Its nice to see an engine builder do what they do and actually build up something available rather than sell something. Watching you build to precise tolerances and values is what I grew up believing in when someone said "machine shop". I can't tell you how many times I've gone in behind a reputable "machine shop" just to find a lot of sloppy work. Fine work you're doing and excellent documentation. I look forward to notifications of new uploads.
Arturo Zarate could not agree more. It’s a very scary thing when the “machinist” you’re working with, you have to hold their hand on extremely basic things... that’s not a machinist. That’s a hackjob fraud. I want to walk into a shop and come out a more informed car guy.
Nice build ! I got a oval port 781 and 289 block .. this things crazy! Love the tunnel ram set up !! Great work awesome videos on the build.. gives me a new direction to build mine to !
thanks for taking the time to make the videos. Its cool to see all the steps involved. It gives me an appreciation for the amount of work that is put into a proper engine build.
I want to see a max effort pump gas iron head BBC oval port motor done to see what you guys can do, the bbc seams like your specialty so I would stick with that, then dyno and track test it, that kind of thing really helps the advertising and you don't see hardly anyone taking 781 heads very serious anymore vs what's available these days, it's nice to see you guys doing it without a million bucks invested, i always have to work with tight budgets for the engines I build and I think it's much more satisfying going as fast or faster than someone who just threw a ton of cash at their engine, jmo
I'm an old school Chevy fan. This video of a 467 build is impressive for the size engine, I enjoy following this channel. In 1982 I purchased a crate Ls7 and all I did to it was pay a local engine builder to do some work on the heads, I added a holley strip dominator intake, modified 830 holley, c12 racing fuel and I had a ball with this engine in a 1970 camaro.
Those numbers are definitely correct I had a 71 454 12.1 tunnel ram with two 660 Center squirter all roller and it was dynoed at 720 horsepower. I had it in my flat bottom aquacraft race boat. It haul ass.
2 Bolt Mains and Oval port heads! Makes you wonder why one should maybe waste(?) money on "glamorous" 4 bolt main blocks and costly square port heads! Great work guys!
@@wedge4hire To be forthcoming about the matter, I do NO not have a lot of money and have NOT had a lot of money due to unexpected health problems through out my adult life. I did not mean to sound like a big money snob, since I am not one. I am a rect port BBC fan. At one time I had a rect port BBC that I loved, that I worked like a slave to get, as well as several oval port BBCs along the way that I liked a lot, for comparison. The rect port BBC is much more of a notable step up than any kind of a waste. Granted it has to be done right, to get the right results, but those results are something to long for .......IF a person likes high performance cars........ rather than to mis label as a waste. My dumb shit brother blew up my Rect Port BBC. He took (stole) the car with out permission. He promptly blew the motor with his dumb shit antics. Those are really strong motors so once they are pushed beyond their limits, it's a real mess. THERE is the real "waste" of money!!! I have never had the financial resources to make it back to that (WONDERFUL) point. One more thing, when your bad ass friend wants to kick the shit out of your brother for blowing up your prize rect port BBC. Don't stop him, like I did. There would be another mistake/ waste. I know. Encourage the guy who wants to do the ass kicking.
Man that sure likes to rev, that's SERIOUS power, I was watching another channel who built a Mopar 440 stroker to about 500 cubes and that only made 530 with AL heads, dual plane intake
Oval ports are the way to go but with 2.25 intake and 1.85 exhaust. Header 2.125 internal diameter. The last two I did where 11:1 compression, single plane 1050 Dominator and made the same 735hp. I want to add a vacuum pump and Tunnel Ram to see if 780 is possible. I'd also like to bump up the compression and run race gas. Thanks for sharing.
Enjoy your big block smart hp for the dollar. Thru the 80's builting race to what if (new and used parts that normally wouldn't try) 396/360hp factory and put no name 292 cam, 1050 Dom with the chrome 4 stack in a Doug Nash 5 speed 66 Chevelle with no carpet or back seat, Hooker headers, ladder bars, weld wheels w slicks. Car ran 10.86et even ran cold fuel can made out copper tubing, and coffee can. The car was used to deliver parts, and a junk yard dog. No one could believe the 1050 would run on a warmed up 396. It ran lean added 100 jet all four corners. Last time I saw the car still running 4 years later. I did set up chassis like high boy. For garage driveways and ha ha ha weight transfer. Wheelie bars were needed. Such a fun V-8 Vega killer back in 83. Most fun for the buck and Honest Charley gave most of the parts...fun years.
I like your videos mark. Thanks for taking the time. Excellent engine builder. I’m old school also. But it’s a Ls world now. Love to see a N/A Ls build from you.
@@thereluctantgearhead4544 - Look, I'm an old guy and love my old school stuff, but BBC's are no longer king of the hill! The LS platform can out perform an old BBC all day. Just tellin' the truth.
@@Anarchy-Is-Liberty in your mind maybe, but I'm a old guy too chief, and I've built a lot of LS engines for people and they ain't all that. You do you.
I think this is the most impressive build I've ever seen. I would never have dreamed of using the oval ports for anything over maybe 540 horsepower n/a. I'm really looking forward to see what numbers I can get with mine when its done, but I'm pretty sure I'll need to buy my reciprocating from Vortec Pro. The machinist I was using for this level in the past died. Dick Champlain of Bolsa Machine. He moved back up here to Minnesota from Westminster California. I dint know how good I had it until he was gone.
I’d like to see you decreeing the cam starting with finding true tdc. Checking the cam for accuracy and also piston to valve clearance. Lots of varied info out there on these tasks. Killer big block you built there. Sounds like a dream.
700+ HP! Holy hell! I'm also working on 4 sets of 781 BBC heads for various motors currently. I really want to know what ported 781 heads with 2.19 & 1.88 valves in a 396/402 engine can do. I'm sure you've done this combo and would love a reply. Thanks.
I was reading some of the comments. By the was that's a very nice big block. I am a small block guy. Someone was commenting on the 421,427.454, small block Chevy engine to know what the torque and horse power would be.I can tell you that I have a 467 small block Chevy engine with 18 degree heads and it makes around 820 horsepower 650 torque. I have it in a 87 S10 truck with no NOS in a 2800 pound truck and run upper 5.70s.very strong small block.
350 Buick 10-11.5 compression, Roller engine, pored heads, and Single plane take, your choice solid or hydraulic roller camshaft... Love to see that built as I am building a Fitech blow thru 88mm PT turbo 355 forged rods and pistons "reworked crank" sbb on e-85,, running the plumbing now, shooting for 700rwhp 1977 regal s/r,,, 9inch ford 4 link bad street car eventually.. but please one day build one... Build on Brother!!!
I feel like the 396 BBC has received bad press or has been ignored for the past 20 years. I would like to see a 396 that is given the benefit of newer technology. Perhaps fitted with a roller cam, open chamber heads (factory and aftermarket), better fuels, maybe EFI to see if 396s are really outdated or still viable against newer engines that use factory technology. It might be too broad of a scope, or require too many resources, but I have been curious about this for some time. I do like your real world approach, BTW. -Thanks!
Not that it has been given bad press its just a 'small' BB compared to the 427/454 and they're all the same design so why waste $$$ for a 396 build when you can easily build a 468. It's obvious that the newer engines such as in the new Camaro SS are superior regarding output as are the 10 speed auto. transmissions, etc. However these newer engines have the benefit of AL heads with superior flow and technology in all aspects like fuel delivery, internal part weight that cars from the 60's didnt have, even an L-88 was just pure power with huge cam and 12.5 while a new SS or ZL-1 idle like a kitten, the new Camaro is about a 12.5 car in the 1/4 off the floor, more than any showroom car from the 60's except maybe the L-88 with headers, gearing and traction but it got 5 mpg not about 20 like the new SS. I built a 67 RS Camaro with a 427/425 with 456 gears and a 4 speed in 1975.
I would love to see you do an intake manifold comparison on this engine. 1x4 4150 and 4500 Dart, Brodix, and Pro Filer , 67' Tri Power setup, and a couple of different tunnel rams (Dart, Pro Filer, Weiand).......great build and impressive power from 781 castings.....
I built a sbc 421 with a factory 400 block 13.5 to 1 and solid roller with 675 lift and 108 center. Its in my Chevelle and waiting to get the little stuff buttoned up to see how she pulls. Hughes Powerglide with a brake and 5000 converter. Time will tell.
Very sweet sounding!!!! Love to see the port work and flow numbers and specs on these heads! I know that it would be very difficult to make another set like them but very interested in seeing the work! Nice job!
Bore vs Stroke Build. Displacement being equal. 396 Block with 454 Crank vs 454 Block with 396 crank. You do NICE work. Impressive performance. Thanks for sharing.
Lionel Mumper 454 block with a 396 crank was a popular combo back in the day. It's what GM called their 427. 366,396,427 all the same stroke. 427 was a monster with the larger bore to actually make use of rectangular port heads. Then GM decided why not add a longer stroke. 427 is a great high revving monster while the 454 made better torque for the heavy 4000lb cars. They don't take the above 7krpm abuse. Owned the 396,427,454 and the 400 and 383 sbc. Long stroke and big bore makes for ridiculous low end torque. The 375hp 396 sucks on the street because the heads and it needs a high 4 series gear in a heavy car. 400 with a mild cam and good intake was more fun. Long burnouts and was daily driven.
Yes, the 427 CI displacement was the Sweet Spot during the pinnacle of the Muscle car era. 427 BBC / 426 Hemi / 427 Side Oilier & SOHC engines. Absolute Peak of an Unparalleled era! Truly Historic!!! My Intrigue!! Displacement being equal, What prevails?? Bore or Stroke. The BBC is the perfect platform to prove the Science. VORTECPRO can provide the definitive data that NASCAR, NHRA & Formula 1 already know. I Hope VORTECPRO takes on the Project & Shares their result.
427's just sound great like a blend of SB and BB . But they just dont make the TQ and perform as well. The short stroke big bore works in Small blocks but the Big block have a hard time staying together at the Rpm required. And in drag racing the 60 foot is so important.
Tom Hutchins they cleaned up in NASCAR so I put my money were my mouth is and built one. People don't build them so much anymore because especially on the street they want the displacement. Mine was 12.5:1, got a pair of 66 closed chamber rectangular port heads a set of 7/16 bolt forged rods and a forged crank for $300. Ran a giant mechanical cam that easily buzzed 7600rpm and who knows how much farther it would go. NASCAR used the same factory parts and they would run 8k rpm. Baldwin Motion quit putting them in novas because they said they were completely out of control death traps. 427 .060 over is only a 440 when the 454 is a 468. Most people look at the same price and want bigger. Got a buddy with an ls6 bottom end with l88 heads who's been running it for 15yrs. He got close to 10 flat in a 77 camaro with a crappy t10. He runs 125hp shot and shifted like a trucker to keep the trans together. I don't care if it's a 396, 427, 454 they all work and hold together even with 50yr old gm parts as long as they are planned out and built right. Anything with a cam that doesn't come in til over 4000rpm sounds awesome. My aluminum head 305 sounded awesome with a little comp 280 magnum.
OJ They ran 427's in Nascar in the 60' because the displacement limit was 430. They trashed a lot of parts. The current NASCAR engines are 358 they start out with a 4" bore and 3.5 crank . If short stroke and giving displacement away were good they would do it. Even the big real engine builders have a budget and one of there tricks is they replace cranks more often than blocks so after a race they bore the block and order a slightly shorter stroke crank to stay under the 358 limit. (Thats why you used to see so many odd stroke used NASCAR cranks on the market. But they would stop at about 3.42 stroke.) Drag race is an odd deal the engine only runs for a few seconds and on a quarter mile 20 runs is only 5 miles! at 10 seconds thats 3 minutes and 20 seconds of full throttle run time. with 20 cool downs in between! Long stroke and heavy reciprocating weight is actually an advantage in drag racing. (john force summed it up at a funny car motor is nothing but an ignorant nitro burning flywheel) You stall it against the converter flash it and your off using the stored energy. In oval track and road racing its the opposite you want Min crank ect weight for acceleration and braking . i think that was your point? You know what they say about drag racing the good thing is anybody can do it the bad thing is anybody can do it DONT take that personal If its so easy why do it? pretty much why I stopped drag racing in the 70's and went oval track and road race stuff
Any tips on making a solid roller survive on the street? Is a hybrid roller as reliable as a hydraulic roller? Do you set it up with solid roller springs or hydraulic. I’m asking because I want to build a 427 and I know they like to rpm to get the most out of them. 7000+. Since it seems most people laugh at even wanting to build a 427 it would have to run very strong. What’s the pros and cons with a street tunnel ram on the street. Can they be dialed in to get the same drivability as a single carb or are they constant work? Thank you for your time and wisdom you share with us. Sorry I got carried away with all the questions.
High compression ratio engine 12.5 :1 running on pump fuel The type of build I would like to see is a GMC small or big block Chevy, bored and stroked to a larger capacity 355, 383 or 408 cubic inch running a high compression ratio. Fitted with Vortec or Iron Eagle 49cc cylinder heads running on pump fuel. The following is an example of how to make this work. If a high compression ratio cylinder head is fitted, the engine will not work with pump fuel. The way to make it work is to restrict the inlet by fitting a long duration cam with Comp cams 1.3:1 low ratio break in rockers fitted to the INLET VALVES ONLY, the peak volumetric efficiency will be reduced from let’s say 100% to 80%. Alternatively if a custom ground longer duration 270 Magnum cam with 420 thou lift on the inlet 224 degrees duration @ 50 thou lift with a larger nose circle on the inlet cam lobes. On the exhaust 470 thou lift 224 degrees @ 50 thou lift, the engine will now run on pump fuel. To give you some idea how much the static compression needs to be raised and the inlet valve lift lowered do the following. Take the performance readings from an engine and look at the static compression ratio and the peak volumetric efficiency at maximum torque. Then fit the Comp cams low lift rockers to the INLET VALVES ONLY or fit a custom ground low lift cam. Do another full throttle torque curve and look at the data to determine how much the volumetric efficiency has gone down. Having started off at a hypothetical 100% volumetric efficiency and reduced it to an hypothetical 80% volumetric efficiency the following explains how much the static compression needs to be increased to make up for the reduction in volumetric efficiency. That is 12.5:1. Then the engine needs to be dyno tested and blue printed to record the specification. If an engine has been bored and stroked to increase the capacity. A budget cylinder head can to be fitted with 170cc or 180cc inlet ports. Not an expensive cylinder head with large inlet ports. The smaller ports keep the air flow velocity high. The golden rule is if the engine flows less fuel air charge compress the fuel air charge more. This is done by increasing the compression ratio. With a reduction in air flow a high compression ratio is no longer a problem. Fitted with a lift reduced longer duration camshaft, small induction runners and an increase in compression ratio the engine should have a flatter torque curve and not lose any low end torque. What’s been described here is a budget build, high torque daily driver. If a thunder bolt is wanted a longer duration 294 degree camshaft or similar would be needed.
I'm all about seeing the Buick engine on the dyno. My buddy runs one in D stock class. Saturn Yellow GSX clone. Lance Line ran it about a week or two ago. Lance is working solo in his shop and he's swamped. I'm going to dyno a 440 Mopar I just built for a guys bracket car after nationals on his Dyno.
I’d like to see a 421,427,434 or a 454 small block build!! I’d like to see the numbers that one puts out & see what the torque is like on one!! I’d like to no if they would be a good truck motor & do well in a truck or not?? I’m building a 421 for a 1972 Chevy 4x4 pickup & I’m hoping it will be a good motor for it!! Any one of those motors would be awesome to see built & I’m pretty sure they would definitely do really good at the drag strip also!! I hear they are a good torque motors but would really like to see one be built & put on the dyno!! Awesome videos & lots of good info!! After I get my 421 done a big block will be my next build for sure!!
Here you go with a drag test thrown in as well...........................................www.chevelles.com/forums/13-performance/794225-vortecpro-454-peanut-port-engine-build-drag-test.html
Oh I’ve watched the peanut port drag test videos many times, I remember you talking about peanut heads on yellowbullet I believe. I’m hoping for some videos in the shop with you porting the peanut heads and installing bigger valves, and modifying the chambers, if that’s information you don’t mind sharing...
What compression is it. I have a 467 as well with the 781s but they are unported stock crank has also been turned. 635 lift cam 10.5 : 1. Really impressive numbers from an iron headed 467 that’s crazy wow great job guys
If you can make this much power with factory heads and blocks, you should be able to make even more with a new set of iron heads and new block from Dart or World Products. I'd like to see a large bore over a short stroke high reving hydrolic roller around the 500 inch range.
Would like to see this same displacement engine and setup run with a set of prepped 990 rectangle port heads , don’t see many people working with these heads anymore.
coronetfabz28 I have a set of 990 castings I’m gonna run on a 468 with male 10.7 compression in a 69 Chevelle. It will be a hydraulic Howard’s roller cam! It is a street car with boxed frame mods and 9” ford rear axle! I will run it at the track also !
I have a 78 Suburban K20 that I am planning to put back together as I will need it to pull trailers that are carrying the motorcycle and place where I can sleep at night. I am hoping to put in a 632 Bluepoint motor for as much torque and power as I can get for this vehicle. I also would like you to do something a little different and build a Corvair pancake 6 engine to find out what is available in the range of power and torque.
I would also like to see what could be done with a smog head 350 using the smog heads ported just to see what can be done with factory parts with race cam intake and headers
A 351 W. I heard they can be built for some serious hp. Take it up to 357 ci. 0 deck the block @ the gasket knife cut the crank. Seems Small chev rotating assembly was used. ?? Alum aftermarket heads it was called the 357 magnum....
Question tall deck BBC 632 tunnel ram and carbs 267/279 @050 756/767 11.1:0 cr 365 c.c. heads looking for the wow! Factor any suggestions? Very nice engine ya BUILT thanks
Do a 427 with the oval ports please. I had a .60 over 427 with the 781's like you do them. Never did Dyno it but it had a smaller flat tappet and in a 2nd gen Camaro ran 10.90s. so I am curious to see this combo again
I'd like to see you put a 572 short block under your 620hp 454 build with the same set up (no cam change). Use the extra chamber volume adjustment to make further unshrouding work. Or use the same head and switch to E85 fuel. Would you go to a tall deck and use spacers on the intake? (so a longer piston skirt could be used)
Sorry she was running lean, and the carbs were not wide open, secondaries were less than 50 percent. Don't take my word , look at video.(my life is tunnel rams).
How much porting was done to the heads? Looking to do a 454 with the old LS7 cam with some worked ovals, about 10.5:1, kind of a nostalgia type pump gas deal. Would love to see you guys test those old factory cams on some modern day compression ratios!
Like to see a lower RPM peak Big Block with 215 semi-closed chamber heads. Something like might be a Jet Boat motor, or one for a Mercruiser stern drive with a peak at around 5,500 RPM. Curious where the closed chamber heads fall down ?? We know you do work on "un-shrouding" and low to medium lift motors too, so how about upper mid-range TQ monster motor ... :D
Do the ls1 build alot of guys have an ls and know thry make good power but just how much out of stock gear is a good question.love your bigblock build vids too.
Enjoying your video series. Was wondering if you sell balanced rotating assemblies? All I seen on your web site that I found were complete engines. Also the rotating assembly that you are putting together would it hold up to a grassroots blower? If not what changes need to be made?
I'd really like to see a low compression (9.5:1 static) stroker with your ported 049 or 781 heads. I admire your work, since I heard of you. That 467 screams. wow
I'm in the middle of a 489 9.5:1 with self ported 781 heads, SRP +18cc pistons. My machinist picked out a solid flat tappet dual pattern Lunati 60240. There isn't a shop with a flow bench anywhere near me, but my runners are measuring 270cc/265cc, and with Ferrea 2.19"/1.88" valves (back cut, and swirl polished) installed. This is my first big block, and my first time porting. My machinist was thoroughly impressed with my work on my heads, but after watching the 620 hp series, I'm thinking I hogged my bowls too much. My machinist said I'm just fine for what I'm looking for, but I'm a bit concerned. I get it, it's my first go at porting, but im a bit of a perfectionist. I built a flowbench according to David Vizard's books. It doesn't give me cfm numbers, but I did make improvements. although it ran out of breath after .200" lift. I think it would work well on much smaller heads.
Derek, I've seen his 496's on the dyno. I'd like to see a series on a "low compression" stroker like the 620 series. The 489 is my first big block, but I have another to build. The next one being a bit more radical.
"im a bit of a perfectionist". Good for You Jason. Something tells me Mark Jones has the same stuff. If it's not right then make it right. That is what built this country!
I'd like to see a 406 sbc build with a hydraulic flat tappet cam like a Comp 305 Magnum or a crane saturday night special 302. Both those cams are single pattern so I'd like to see a 1.6 X 1.5 rocker test and here's the kicker, use a Edelbrock single 4 Smokey Yunik cross ram or Offy single 4 cross ram! Use Pro max, muscle car aluminum heads, $1,000.00 or less set of heads, nothing exotic, 23 degree stuff! GM block, what a guy building a toy in his garage, buying parts, from Summit, Jeg's and eBay!
Hey Mark, can you put a adjustable belt drive on a build, and do a couple of different pulls With general cam you use 496ci build, would be interesting to show Power level change from retarding 4degs and advanced 4 degree, Haven't seen anyone yet put one on CZcams.
Do a budget build using a stock 454 or a .030 over 468 with "stock" 781 vs simple "port & polish" 781 heads...,I'm running a 454 with stock 781 heads, Holley Air Gap single plain intake with 750 dp Holley carburetor in my Jet Boat. Would love to see how much power and flow you can pull from stock 781 vs porting them
@@youcanbesmartaskhow3857 Yes it had more compression than his street 468 that he used in his Chevelle, still ran a 10.50 running out before the end of the track, Mark feels 410 would have been a better choice along with a more top end cam too.
Why are you testing at 600 RPM/sec , that engine should go over 770 at 300Rpm/sec , which is the typical acceration rate you test at. And is fuel A the front carb and fuel the rear?
I have an observation. It looks like the carbs are not going full throttle during this dyno test. Am I seeing this correct? Are you leaving power on the table by not getting full throttle? I am enjoying the 620HP 467 build videos and I am eager to see the track testing with that engine. Thanks.
Cracking 700hp with iron oval ports is very impressive...nice clean build....
Its nice to see an engine builder do what they do and actually build up something available rather than sell something. Watching you build to precise tolerances and values is what I grew up believing in when someone said "machine shop". I can't tell you how many times I've gone in behind a reputable "machine shop" just to find a lot of sloppy work. Fine work you're doing and excellent documentation. I look forward to notifications of new uploads.
Arturo Zarate could not agree more. It’s a very scary thing when the “machinist” you’re working with, you have to hold their hand on extremely basic things... that’s not a machinist. That’s a hackjob fraud. I want to walk into a shop and come out a more informed car guy.
Most machine shops do slappy work. It takes time to do it right.
Nice build ! I got a oval port 781 and 289 block .. this things crazy! Love the tunnel ram set up !! Great work awesome videos on the build.. gives me a new direction to build mine to !
thanks for taking the time to make the videos. Its cool to see all the steps involved. It gives me an appreciation for the amount of work that is put into a proper engine build.
Have an engine you built several years ago, 550 hp ? Couldn't be happier !
It just goes back to real good engineering, you know the rules no school like the old school.
I want to see a max effort pump gas iron head BBC oval port motor done to see what you guys can do, the bbc seams like your specialty so I would stick with that, then dyno and track test it, that kind of thing really helps the advertising and you don't see hardly anyone taking 781 heads very serious anymore vs what's available these days, it's nice to see you guys doing it without a million bucks invested, i always have to work with tight budgets for the engines I build and I think it's much more satisfying going as fast or faster than someone who just threw a ton of cash at their engine, jmo
Me too. LMAO, as I pass them in 1/4 mile.
I'm a Chevrolet guy keep them videos coming 👍
Just stumbled across this build series. Really enjoying the Tech and Outcome... Thanks to you and the Team!
I'm an old school Chevy fan. This video of a 467 build is impressive for the size engine, I enjoy following this channel. In 1982 I purchased a crate Ls7 and all I did to it was pay a local engine builder to do some work on the heads, I added a holley strip dominator intake, modified 830 holley, c12 racing fuel and I had a ball with this engine in a 1970 camaro.
Those numbers are definitely correct I had a 71 454 12.1 tunnel ram with two 660 Center squirter all roller and it was dynoed at 720 horsepower. I had it in my flat bottom aquacraft race boat. It haul ass.
Wicked engine ya built there. I'm on board with whatever project you do.
starts and idles effortlessly! sounds very crisp! over 1.5 hp per cube!
2 Bolt Mains and Oval port heads! Makes you wonder why one should maybe waste(?)
money on "glamorous" 4 bolt main blocks and costly square port heads! Great work guys!
QUOTE Makes you wonder why one should maybe waste(?) UNQUOTE you have OBVIOUSLY never had a good running rect port head BBC 😃😃😃😃😃
@@wedge4hire To be forthcoming about the matter, I do NO not have a lot of money and have NOT had a lot of money due to unexpected health problems through out my adult life. I did not mean to sound like a big money snob, since I am not one. I am a rect port BBC fan. At one time I had a rect port BBC that I loved, that I worked like a slave to get, as well as several oval port BBCs along the way that I liked a lot, for comparison. The rect port BBC is much more of a notable step up than any kind of a waste. Granted it has to be done right, to get the right results, but those results are something to long for .......IF a person likes high performance cars........ rather than to mis label as a waste. My dumb shit brother blew up my Rect Port BBC. He took (stole) the car with out permission. He promptly blew the motor with his dumb shit antics. Those are really strong motors so once they are pushed beyond their limits, it's a real mess. THERE is the real "waste" of money!!! I have never had the financial resources to make it back to that (WONDERFUL) point. One more thing, when your bad ass friend wants to kick the shit out of your brother for blowing up your prize rect port BBC. Don't stop him, like I did. There would be another mistake/ waste. I know. Encourage the guy who wants to do the ass kicking.
@@wedge4hire 👍👍👍
Man that sure likes to rev, that's SERIOUS power, I was watching another channel who built a Mopar 440 stroker to about 500 cubes and that only made 530 with AL heads, dual plane intake
jim dandy I bet it made as much torque probably more a lot lower in the rpm that’s one thing 440 are good at
Thanks for sharing your videos and knowledge! I go back and watch them time and time again. Like that ole Chevelle!
Oval ports are the way to go but with 2.25 intake and 1.85 exhaust. Header 2.125 internal diameter. The last two I did where 11:1 compression, single plane 1050 Dominator and made the same 735hp. I want to add a vacuum pump and Tunnel Ram to see if 780 is possible. I'd also like to bump up the compression and run race gas. Thanks for sharing.
Steve Solo wat cam
Enjoy your big block smart hp for the dollar. Thru the 80's builting race to what if (new and used parts that normally wouldn't try) 396/360hp factory and put no name 292 cam, 1050 Dom with the chrome 4 stack in a Doug Nash 5 speed 66 Chevelle with no carpet or back seat, Hooker headers, ladder bars, weld wheels w slicks. Car ran 10.86et even ran cold fuel can made out copper tubing, and coffee can. The car was used to deliver parts, and a junk yard dog. No one could believe the 1050 would run on a warmed up 396. It ran lean added 100 jet all four corners. Last time I saw the car still running 4 years later. I did set up chassis like high boy. For garage driveways and ha ha ha weight transfer. Wheelie bars were needed. Such a fun V-8 Vega killer back in 83. Most fun for the buck and Honest Charley gave most of the parts...fun years.
I like your videos mark. Thanks for taking the time. Excellent engine builder. I’m old school also. But it’s a Ls world now. Love to see a N/A Ls build from you.
Not everybody wants an LS. Bigblock Chevys are still a better engine if you want real power.
@@thereluctantgearhead4544 - Look, I'm an old guy and love my old school stuff, but BBC's are no longer king of the hill! The LS platform can out perform an old BBC all day. Just tellin' the truth.
@@Anarchy-Is-Liberty in your mind maybe, but I'm a old guy too chief, and I've built a lot of LS engines for people and they ain't all that. You do you.
i would like to see a 460 ford with the afr heads, love your work and hope people realise why it costs what it cost.
467 ! That's what I want !
I think this is the most impressive build I've ever seen. I would never have dreamed of using the oval ports for anything over maybe 540 horsepower n/a. I'm really looking forward to see what numbers I can get with mine when its done, but I'm pretty sure I'll need to buy my reciprocating from Vortec Pro. The machinist I was using for this level in the past died. Dick Champlain of Bolsa Machine. He moved back up here to Minnesota from Westminster California. I dint know how good I had it until he was gone.
Thats the cool man! Over 700 hp... Wow!
A low bucks small block would be great.
I’d like to see you decreeing the cam starting with finding true tdc. Checking the cam for accuracy and also piston to valve clearance. Lots of varied info out there on these tasks. Killer big block you built there. Sounds like a dream.
Great video to see. Use what you have and make it work. That’s what it’s all about. Nice peak numbers.
700+ HP! Holy hell! I'm also working on 4 sets of 781 BBC heads for various motors currently. I really want to know what ported 781 heads with 2.19 & 1.88 valves in a 396/402 engine can do. I'm sure you've done this combo and would love a reply. Thanks.
I loved seeing this again, I laugh at those guys who build a 496 with some expensive big rec port heads, billet everything and they can't break 600hp🤣
4.375" crank, 6.385" rods, 4.310" bore, big ovals worked over with a compression and cam allowing 93 octane.
I was reading some of the comments. By the was that's a very nice big block. I am a small block guy. Someone was commenting on the 421,427.454, small block Chevy engine to know what the torque and horse power would be.I can tell you that I have a 467 small block Chevy engine with 18 degree heads and it makes around 820 horsepower 650 torque. I have it in a 87 S10 truck with no NOS in a 2800 pound truck and run upper 5.70s.very strong small block.
Do a caddie 500/472
350 Buick 10-11.5 compression, Roller engine, pored heads, and Single plane take, your choice solid or hydraulic roller camshaft... Love to see that built as I am building a Fitech blow thru 88mm PT turbo 355 forged rods and pistons "reworked crank" sbb on e-85,, running the plumbing now, shooting for 700rwhp 1977 regal s/r,,, 9inch ford 4 link bad street car eventually.. but please one day build one... Build on Brother!!!
I feel like the 396 BBC has received bad press or has been ignored for the past 20 years. I would like to see a 396 that is given the benefit of newer technology. Perhaps fitted with a roller cam, open chamber heads (factory and aftermarket), better fuels, maybe EFI to see if 396s are really outdated or still viable against newer engines that use factory technology. It might be too broad of a scope, or require too many resources, but I have been curious about this for some time.
I do like your real world approach, BTW. -Thanks!
Not that it has been given bad press its just a 'small' BB compared to the 427/454 and they're all the same design so why waste $$$ for a 396 build when you can easily build a 468. It's obvious that the newer engines such as in the new Camaro SS are superior regarding output as are the 10 speed auto. transmissions, etc. However these newer engines have the benefit of AL heads with superior flow and technology in all aspects like fuel delivery, internal part weight that cars from the 60's didnt have, even an L-88 was just pure power with huge cam and 12.5 while a new SS or ZL-1 idle like a kitten, the new Camaro is about a 12.5 car in the 1/4 off the floor, more than any showroom car from the 60's except maybe the L-88 with headers, gearing and traction but it got 5 mpg not about 20 like the new SS. I built a 67 RS Camaro with a 427/425 with 456 gears and a 4 speed in 1975.
A all your videos are good I watched you on my other channel but I can't my other channel back but your very knowledgeable on gm you do very good work
I would love to see you do an intake manifold comparison on this engine. 1x4 4150 and 4500 Dart, Brodix, and Pro Filer , 67' Tri Power setup, and a couple of different tunnel rams (Dart, Pro Filer, Weiand).......great build and impressive power from 781 castings.....
I built a sbc 421 with a factory 400 block 13.5 to 1 and solid roller with 675 lift and 108 center. Its in my Chevelle and waiting to get the little stuff buttoned up to see how she pulls. Hughes Powerglide with a brake and 5000 converter. Time will tell.
Very sweet sounding!!!! Love to see the port work and flow numbers and specs on these heads! I know that it would be very difficult to make another set like them but very interested in seeing the work! Nice job!
Scott Sigmon have you watched his 467 budget build videos?
No sir I have not watched all of them but I am definitely going to and very interested, thanks for the reply.
My Grandaddy Has a Chevrolet Engine Like That My Granny and Grandaddy Love Chevy.
thanks mark i love these videos and i greatly appreciate them keep them coming
Your a bad man. Great job. 👏
Bore vs Stroke Build. Displacement being equal.
396 Block with 454 Crank vs 454 Block with 396 crank.
You do NICE work. Impressive performance. Thanks for sharing.
Lionel Mumper 454 block with a 396 crank was a popular combo back in the day. It's what GM called their 427. 366,396,427 all the same stroke. 427 was a monster with the larger bore to actually make use of rectangular port heads. Then GM decided why not add a longer stroke. 427 is a great high revving monster while the 454 made better torque for the heavy 4000lb cars. They don't take the above 7krpm abuse. Owned the 396,427,454 and the 400 and 383 sbc. Long stroke and big bore makes for ridiculous low end torque. The 375hp 396 sucks on the street because the heads and it needs a high 4 series gear in a heavy car. 400 with a mild cam and good intake was more fun. Long burnouts and was daily driven.
Yes, the 427 CI displacement was the Sweet Spot during the pinnacle of the Muscle car era. 427 BBC / 426 Hemi / 427 Side Oilier & SOHC engines. Absolute Peak of an Unparalleled era! Truly Historic!!!
My Intrigue!! Displacement being equal, What prevails?? Bore or Stroke. The BBC is the perfect platform to prove the Science. VORTECPRO can provide the definitive data that NASCAR, NHRA & Formula 1 already know. I Hope VORTECPRO takes on the Project & Shares their result.
427's just sound great like a blend of SB and BB . But they just dont make the TQ and perform as well. The short stroke big bore works in Small blocks but the Big block have a hard time staying together at the Rpm required. And in drag racing the 60 foot is so important.
Tom Hutchins they cleaned up in NASCAR so I put my money were my mouth is and built one. People don't build them so much anymore because especially on the street they want the displacement. Mine was 12.5:1, got a pair of 66 closed chamber rectangular port heads a set of 7/16 bolt forged rods and a forged crank for $300. Ran a giant mechanical cam that easily buzzed 7600rpm and who knows how much farther it would go. NASCAR used the same factory parts and they would run 8k rpm. Baldwin Motion quit putting them in novas because they said they were completely out of control death traps. 427 .060 over is only a 440 when the 454 is a 468. Most people look at the same price and want bigger. Got a buddy with an ls6 bottom end with l88 heads who's been running it for 15yrs. He got close to 10 flat in a 77 camaro with a crappy t10. He runs 125hp shot and shifted like a trucker to keep the trans together. I don't care if it's a 396, 427, 454 they all work and hold together even with 50yr old gm parts as long as they are planned out and built right. Anything with a cam that doesn't come in til over 4000rpm sounds awesome. My aluminum head 305 sounded awesome with a little comp 280 magnum.
OJ
They ran 427's in Nascar in the 60' because the displacement limit was 430. They trashed a lot of parts.
The current NASCAR engines are 358 they start out with a 4" bore and 3.5 crank . If short stroke and giving displacement away were good they would do it.
Even the big real engine builders have a budget and one of there tricks is they replace cranks more often than blocks so after a race they bore the block and order a slightly shorter stroke crank to stay under the 358 limit.
(Thats why you used to see so many odd stroke used NASCAR cranks on the market. But they would stop at about 3.42 stroke.)
Drag race is an odd deal the engine only runs for a few seconds and on a quarter mile 20 runs is only 5 miles! at 10 seconds thats 3 minutes and 20 seconds of full throttle run time.
with 20 cool downs in between!
Long stroke and heavy reciprocating weight is actually an advantage in drag racing. (john force summed it up at a funny car motor is nothing but an ignorant nitro burning flywheel)
You stall it against the converter flash it and your off using the stored energy.
In oval track and road racing its the opposite you want Min crank ect weight for acceleration and braking .
i think that was your point?
You know what they say about drag racing
the good thing is anybody can do it
the bad thing is anybody can do it
DONT take that personal
If its so easy why do it?
pretty much why I stopped drag racing in the 70's and went oval track and road race stuff
Any tips on making a solid roller survive on the street? Is a hybrid roller as reliable as a hydraulic roller? Do you set it up with solid roller springs or hydraulic. I’m asking because I want to build a 427 and I know they like to rpm to get the most out of them. 7000+. Since it seems most people laugh at even wanting to build a 427 it would have to run very strong. What’s the pros and cons with a street tunnel ram on the street. Can they be dialed in to get the same drivability as a single carb or are they constant work? Thank you for your time and wisdom you share with us. Sorry I got carried away with all the questions.
I'd like to see a 6.0 LS build with a focus on low-end torque. Keep up the good work Mark, I really enjoy these videos.
Jesse Endsley normally people don't build LS motors for torque just high hp builds.
Brian Samuels hence the reason I'd like to see Mark build one. For guys like myself that have 3/4 ton trucks and use them as such.
Jesse Endsley I feel you bro
High compression ratio engine 12.5 :1 running on pump fuel
The type of build I would like to see is a GMC small or big block Chevy, bored and stroked to a larger capacity 355, 383 or 408 cubic inch running a high compression ratio. Fitted with Vortec or Iron Eagle 49cc cylinder heads running on pump fuel. The following is an example of how to make this work. If a high compression ratio cylinder head is fitted, the engine will not work with pump fuel. The way to make it work is to restrict the inlet by fitting a long duration cam with Comp cams 1.3:1 low ratio break in rockers fitted to the INLET VALVES ONLY, the peak volumetric efficiency will be reduced from let’s say 100% to 80%. Alternatively if a custom ground longer duration 270 Magnum cam with 420 thou lift on the inlet 224 degrees duration @ 50 thou lift with a larger nose circle on the inlet cam lobes. On the exhaust 470 thou lift 224 degrees @ 50 thou lift, the engine will now run on pump fuel. To give you some idea how much the static compression needs to be raised and the inlet valve lift lowered do the following. Take the performance readings from an engine and look at the static compression ratio and the peak volumetric efficiency at maximum torque. Then fit the Comp cams low lift rockers to the INLET VALVES ONLY or fit a custom ground low lift cam. Do another full throttle torque curve and look at the data to determine how much the volumetric efficiency has gone down. Having started off at a hypothetical 100% volumetric efficiency and reduced it to an hypothetical 80% volumetric efficiency the following explains how much the static compression needs to be increased to make up for the reduction in volumetric efficiency. That is 12.5:1. Then the engine needs to be dyno tested and blue printed to record the specification. If an engine has been bored and stroked to increase the capacity. A budget cylinder head can to be fitted with 170cc or 180cc inlet ports. Not an expensive cylinder head with large inlet ports. The smaller ports keep the air flow velocity high. The golden rule is if the engine flows less fuel air charge compress the fuel air charge more. This is done by increasing the compression ratio. With a reduction in air flow a high compression ratio is no longer a problem. Fitted with a lift reduced longer duration camshaft, small induction runners and an increase in compression ratio the engine should have a flatter torque curve and not lose any low end torque. What’s been described here is a budget build, high torque daily driver. If a thunder bolt is wanted a longer duration 294 degree camshaft or similar would be needed.
Awesome Video old school ported iron on that baby everyone just want to buy race heads now days like to see a ported rectangle port build bbc
Do a rectangular port build. 990s or 088s please.
I have a set of 858s and would love to see what he would do to them
That sir is one fine big block
I wish he’d do a 396 and show us how to get 500hp from 50 year old stock parts. And port some closed chamber heads.
Yes please. Any more content would be welcome. :)
I'm all about seeing the Buick engine on the dyno. My buddy runs one in D stock class. Saturn Yellow GSX clone. Lance Line ran it about a week or two ago. Lance is working solo in his shop and he's swamped. I'm going to dyno a 440 Mopar I just built for a guys bracket car after nationals on his Dyno.
I would like to see a chevy 302 with vortec heads. Or a 283 low buck build.
Tunnel ram is always the answer
Ls platform ,nitrous , Na and turbo build. Start with all stock parts and start adding aftermarket to measure the increases.
I’d like to see a 421,427,434 or a 454 small block build!! I’d like to see the numbers that one puts out & see what the torque is like on one!! I’d like to no if they would be a good truck motor & do well in a truck or not?? I’m building a 421 for a 1972 Chevy 4x4 pickup & I’m hoping it will be a good motor for it!! Any one of those motors would be awesome to see built & I’m pretty sure they would definitely do really good at the drag strip also!! I hear they are a good torque motors but would really like to see one be built & put on the dyno!! Awesome videos & lots of good info!! After I get my 421 done a big block will be my next build for sure!!
I would like see some videos on Mark’s work with peanut port heads, and flow test them...
Here you go with a drag test thrown in as well...........................................www.chevelles.com/forums/13-performance/794225-vortecpro-454-peanut-port-engine-build-drag-test.html
Oh I’ve watched the peanut port drag test videos many times, I remember you talking about peanut heads on yellowbullet I believe. I’m hoping for some videos in the shop with you porting the peanut heads and installing bigger valves, and modifying the chambers, if that’s information you don’t mind sharing...
YES! For all of us "boat" guys with peanut port heads looking to just get 450HP :)
What compression is it. I have a 467 as well with the 781s but they are unported stock crank has also been turned. 635 lift cam 10.5 : 1. Really impressive numbers from an iron headed 467 that’s crazy wow great job guys
Never mind I see you said mid 11 to 12 to 1 wow 6800 rpm to
What's the dome cc on ur pistons. I'm doing the same build
Too much cam, heads wont flow enuff. 781s at 550 backflow.
If you can make this much power with factory heads and blocks, you should be able to make even more with a new set of iron heads and new block from Dart or World Products. I'd like to see a large bore over a short stroke high reving hydrolic roller around the 500 inch range.
Would like to see this same displacement engine and setup run with a set of prepped 990 rectangle port heads , don’t see many people working with these heads anymore.
coronetfabz28 I have a set of 990 castings I’m gonna run on a 468 with male 10.7 compression in a 69 Chevelle. It will be a hydraulic Howard’s roller cam! It is a street car with boxed frame mods and 9” ford rear axle! I will run it at the track also !
I'd like to see you do a Cleveland. Non strocker. With stock crank and rods.
I have a 78 Suburban K20 that I am planning to put back together as I will need it to pull trailers that are carrying the motorcycle and place where I can sleep at night. I am hoping to put in a 632 Bluepoint motor for as much torque and power as I can get for this vehicle.
I also would like you to do something a little different and build a Corvair pancake 6 engine to find out what is available in the range of power and torque.
I would also like to see what could be done with a smog head 350 using the smog heads ported just to see what can be done with factory parts with race cam intake and headers
A 351 W. I heard they can be built for some serious hp. Take it up to 357 ci. 0 deck the block @ the gasket knife cut the crank. Seems Small chev rotating assembly was used. ?? Alum aftermarket heads it was called the 357 magnum....
I WOULD LIKE TO SEE Chevy BBC 427 tested with different Oval port heads to reach 70to 800 has. THK
Question tall deck BBC 632 tunnel ram and carbs 267/279 @050 756/767 11.1:0 cr 365 c.c. heads looking for the wow! Factor any suggestions? Very nice engine ya BUILT thanks
Enjoy your video! Thank You for sharing 👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻
Did you mention a Buick engine build towards the end of the vid?? Yes then!
Do a 8.1 vortec with factory heads. Interested to see how much power they can make
Yeah, I'm ready to see those motors start taking off. That's a good platform to not be used that much
Outstanding
Awesome man thanks i like sound of the chevy motors
can you do a walk through of the machines you use and what tools to look for in a machine shop building an engine for a customer
check the channel, there is a bunch of stuff he has out there.
Do a 427 with the oval ports please. I had a .60 over 427 with the 781's like you do them. Never did Dyno it but it had a smaller flat tappet and in a 2nd gen Camaro ran 10.90s. so I am curious to see this combo again
thanks for sharing ☺️
I have a 427 chevy big block, from a grain truck. This is a tall deck, with factory reverse gear drive camshaft. Can this make 729 hp??
Speed costs money! How fast can you afford to go?
@@mattrosenboom4810
10 second quarter mile, in a 1972 corvette (original big block) (3300 to 3400 pounds)
650 hp. To 750 hp.
I'd like to see you put a 572 short block under your 620hp 454 build with the same set up (no cam change). Use the extra chamber volume adjustment to make further unshrouding work. Or use the same head and switch to E85 fuel. Would you go to a tall deck and use spacers on the intake? (so a longer piston skirt could be used)
That is one bad little dude
Sorry she was running lean, and the carbs were not wide open, secondaries were less than 50 percent.
Don't take my word , look at video.(my life is tunnel rams).
Iron heads are better than aluminum. Watch the prices go up!
Iron American Dream on CZcams.
Low buck DZ 302 using 283-327
Are you going vintage racing?
Would love to see a 468 with dark one pro 325 heads with tunnel ram and dual Dom's 13 to 1 compression with around a770 lift and 300 duration cam
How much porting was done to the heads? Looking to do a 454 with the old LS7 cam with some worked ovals, about 10.5:1, kind of a nostalgia type pump gas deal. Would love to see you guys test those old factory cams on some modern day compression ratios!
Do you ever "do a 454" with the ovals, like you said?
If you pulled that off, was it worth it? I can't make up my mind. Change my mind....
What can you do with a 402 big block, something on street gas or maybe e-85, love the way you build motors.
That is an awsome build would rect port heads make anymore power on this combo?
Like to see a lower RPM peak Big Block with 215 semi-closed chamber heads. Something like might be a Jet Boat motor, or one for a Mercruiser stern drive with a peak at around 5,500 RPM. Curious where the closed chamber heads fall down ?? We know you do work on "un-shrouding" and low to medium lift motors too, so how about upper mid-range TQ monster motor ... :D
Italy? Ferrari, Lamborghini Killer! And whatever other euro junk they have. Great sound
Curious why you say “N/A of course”
A Chinese turbo on one of these would be a beast.
Prochargedmopar naturally asperated =no turbo,blower
Hank Clingingsmith Exactly,
Why leave simple/reliable power on the table?
Would be interested to know how much difference in numbers between single carb manifold and tunnel ram with the same engine... Great channel btw...
Do the ls1 build alot of guys have an ls and know thry make good power but just how much out of stock gear is a good question.love your bigblock build vids too.
Poverty must be rough. Btw. I'll take one. ☝️
Enjoying your video series. Was wondering if you sell balanced rotating assemblies? All I seen on your web site that I found were complete engines. Also the rotating assembly that you are putting together would it hold up to a grassroots blower? If not what changes need to be made?
Nice work on that engine. What kind of numbers could i expect with a 9to.1 comp ratip and a smaller cam. Comp 595 .
I'd really like to see a low compression (9.5:1 static) stroker with your ported 049 or 781 heads. I admire your work, since I heard of you. That 467 screams. wow
Jason Evers I have a low compression 496 BBC with 088 heads
I'm in the middle of a 489 9.5:1 with self ported 781 heads, SRP +18cc pistons. My machinist picked out a solid flat tappet dual pattern Lunati 60240. There isn't a shop with a flow bench anywhere near me, but my runners are measuring 270cc/265cc, and with Ferrea 2.19"/1.88" valves (back cut, and swirl polished) installed. This is my first big block, and my first time porting. My machinist was thoroughly impressed with my work on my heads, but after watching the 620 hp series, I'm thinking I hogged my bowls too much. My machinist said I'm just fine for what I'm looking for, but I'm a bit concerned. I get it, it's my first go at porting, but im a bit of a perfectionist. I built a flowbench according to David Vizard's books. It doesn't give me cfm numbers, but I did make improvements. although it ran out of breath after .200" lift. I think it would work well on much smaller heads.
They have done lots of them, check the channel out
Derek, I've seen his 496's on the dyno. I'd like to see a series on a "low compression" stroker like the 620 series. The 489 is my first big block, but I have another to build. The next one being a bit more radical.
"im a bit of a perfectionist". Good for You Jason. Something tells me Mark Jones has the same stuff. If it's not right then make it right. That is what built this country!
I'd like to see a 406 sbc build with a hydraulic flat tappet cam like a Comp 305 Magnum or a crane saturday night special 302. Both those cams are single pattern so I'd like to see a 1.6 X 1.5 rocker test and here's the kicker, use a Edelbrock single 4 Smokey Yunik cross ram or Offy single 4 cross ram! Use Pro max, muscle car aluminum heads, $1,000.00 or less set of heads, nothing exotic, 23 degree stuff! GM block, what a guy building a toy in his garage, buying parts, from Summit, Jeg's and eBay!
Hey Mark, can you put a adjustable belt drive on a build, and do a couple of different pulls
With general cam you use 496ci build, would be interesting to show
Power level change from retarding 4degs and advanced 4 degree,
Haven't seen anyone yet put one on CZcams.
Fkn Sick noise from that thing
stunning sir.
Do a budget build using a stock 454 or a .030 over 468 with "stock" 781 vs simple "port & polish" 781 heads...,I'm running a 454 with stock 781 heads, Holley Air Gap single plain intake with 750 dp Holley carburetor in my Jet Boat. Would love to see how much power and flow you can pull from stock 781 vs porting them
X2
WOW, so you estimate 620 from a 467 single carb and with the tunnel ram its 725 so an increase of 100 running a tunnel ram?
This motor had higher compression I believe and possibly a bigger cam as well. Peace
@@youcanbesmartaskhow3857 Yes it had more compression than his street 468 that he used in his Chevelle, still ran a 10.50 running out before the end of the track, Mark feels 410 would have been a better choice along with a more top end cam too.
Why are you testing at 600 RPM/sec , that engine should go over 770 at 300Rpm/sec , which is the typical acceration rate you test at. And is fuel A the front carb and fuel the rear?
I have an observation. It looks like the carbs are not going full throttle during this dyno test. Am I seeing this correct? Are you leaving power on the table by not getting full throttle?
I am enjoying the 620HP 467 build videos and I am eager to see the track testing with that engine.
Thanks.
Do a small block high powered vortec build