Building a High RPM 400ci SBC to Replace Broken "Compression Obsession" - Engine Power S10, E6&7
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- čas přidán 5. 06. 2024
- Our 360ci Small Block Chevy dyno mule is broken! So, we’re going to take the parts we can salvage, put them in a bigger 400ci Small Block and turn it 7000 RPM on the dyno! And we'll answer the question: how do cubic inches affect power??
00:00 - Intro
03:25 - Test Dyno Run
05:16 - Tech Tip
06:33 - Small Block Teardown
17:44 - Crankshaft Balancing
23:41 - Engine Reassembly
32:49 - Small Block Paint Job
35:01 - E85 Dyno Test
39:14 - Gasoline Dyno Test
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PARTS USED IN THIS EPISODE:
ARP: 8740 Head Bolt Kit
More Info: pntv.us/pn_pt_21731_6451714de...
ARP: Bolts & Fasteners
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Forney Industries: Forney 190 MP Welder
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Summit Racing: Cometic MLS Head Gasket
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Summit Racing: ICT Billet Engine Block Torque Plate
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Summit Racing: Intercomp Racing Valve Spring Tester
More Info: pntv.us/pn_pt_21725_6451669c5...
Summit Racing: Mahle PowerPak Piston and Ring Kit
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Summit Racing: Billet Steel Flywheel
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Summit Racing: Harmonic Balancer
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Summit Racing: Valve Springs
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CWT Industries: Multi-Bal 5500
Sunnen Products Company: SV-15 Honing Machine
ARP: Cam Bolts
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ARP: Carburetor Stud Kit
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ARP: Distributor Stud Kit
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ARP: Header Bolt & Stud Kit
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ARP: Main Studs & Bolts
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ARP: Oil Pump Mounting Stud Kit
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Holley: Quick Fuel Black Diamond 950CFM Carburetor
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Lubrication Specialties: Hot Shot's Secret Adrenaline R-Series Racing Oil
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Lubrication Specialties: Hot Shot's Secret FR3 Oil Friction Reducer
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Total Seal: Piston Ring Assembly Lube
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Summit Racing: AFR 220cc SBC Eliminator Racing Heads
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Summit Racing: AFR Intake Manifold Gaskets
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Summit Racing: Cometic MLS Head Gaskets
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Summit Racing: COMP Cams Camshaft
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Summit Racing: COMP Cams Pushrods
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Summit Racing: COMP Cams Valvetrain Assembly Spray
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Summit Racing: Fel-Pro Performance Rear Main Bearing Seals
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Summit Racing: Jesel Rocker Arm Shims
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Summit Racing: Jesel Rocker Arm Stands
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Summit Racing: Jesel Sportsman Series Shaft Rocker Arms
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Summit Racing: Mahle PowerPak Piston and Ring Kits
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Summit Racing: OTC Cylinder Leakage Tester Kit
More Info: pntv.us/pn_pt_21765_646536228...
Summit Racing
Scat Pro Stock I-Beam Connecting Rods
pntv.us/pn_pt_21759_646534df2...
Summit Racing: Summit Racing Harmonic Balancer
More Info: pntv.us/pn_pt_21766_64653649a...
Summit Racing: Summit Racing Non-Adjustable Piston Ring Compressor
More Info: pntv.us/pn_pt_21761_646535816...
Summit Racing: Trick Flow Billet Steel Timing Set
More Info: pntv.us/pn_pt_21763_646535c44... - Auta a dopravní prostředky
Watch Over 13:1 on Pump Gas! Chevy 350 Dyno Mule: czcams.com/video/okYyReBncC8/video.html
Hey guys where can I get that same large silver degree That you guys use?
@@libertyjusticeforall6754 - Summit or Jegs, etc...
Is that a hydraulic cam and is this engine streetable for highway driving with an air conditioner etc?
Did you not use Anti-Freeze???
What was done as far as the steam holes to match the block ? I see the head gasket has the two center holes but the head did not
Guys, 'IF' the cam was optimal for the original motor(367 CID?) it won't be optimal for a 400. See episode 85 of powerTec 10.
True, but a lot of hotrodders with a busted engine will just swap parts rather than buy all new and start from scratch. so this shows how far they're going to get. They could have also destroked the block to 377 cid, saved the crank, and seen what a bigger bore would have done.
Nice to see a 400 build 👍
When i worked in auto machine shops in the late 80s people would say all 4 bolt 400s had 3 freeze plugs per side ... wrong ! I have found 2 bolt blocks with 3 ! I was boring blocks every day then .
If you ever have that much trouble taking off a cylinder head, first make certain you got ALL the bolts. then, undo the rocker arms so every valve is closed, grab a leakdown tester device that lets you pump air into the cylinder, and find a cylinder at TDC and give it some air. unless the head gasket is blown or the piston rings are gapped wide open, the air pressure might be enough. Also, it's a lot easier to slip the camshaft in before the crankshaft.
Put your block on the floor, bellhousing-side down. Gravity will be your friend as you drop the camshaft in vertically, and you can do this dry, smearing on lube as you guide it past new cam bearings by reaching into the crankcase. now your lube stays inside the crankcase instead of leaking on your shoe. Now use an engine hoist to get it up in the air, bolt on the apparatus from your engine stand so that you only have to guide it into place on the stand rather than hang the engine and try to get every bolt to match the stationary engine stand.
Useable 400 blocks were getting hard to find back in the 80's , that was the reason 383 strokers became popular .
Also by that time, aftermarket rotating assemblies were getting cheaper and more available.
heck ive got 2 of them...... a bone stocker original in a 77 chev K10 (TH400, np203 full time 4)
and a 327 replacement in a 68 impala
@@kainhall I had one of those all time 4x4
I have 3 Waiting for a home.
And I've seen a 3rd gen firebird with a 383 crate that would just eat rear ends, and do burn outs 5 car lengths long. lmao. Fond memories. Definitely something I won't forget. Goals.
That fiber timing gear is a dead giveaway that it’s original GM.
The small block 400 has always been known as a torque monster...
And for running hot 👍🏼
@@RealSteelStreetwhen the rad gets plugged up
@@cedricwilson2055 it’s actually because they don’t have water jackets between the center two cylinders of each side, 3&5 and 4&6👌🏼
@@bigboreracing356 IDK Sherlock, but ‘probably’ because it’s on dyno water 🤣
@@RealSteelStreet How does dyno water cool a engine that does not have water jackets between the center two cylinders of each side , 3&5 and 4&6?
I love the 400 platform. There are so many different builds and types of power adders. I fell in love with the 400 as a teenager. I really enjoyed you guys take on this project! If the 400 had the same amount of money and hot rod parts that the 327 and 350 got the 400 would have been king of the sbs. Looking forward to the next build. Thanks guys for working on these engines and videos some of the best on you tube
Why is it, that the 400 SBC doesnt get the love of the 327/350?? I always wondered that....
@@bobbertee5945 Tons more component choices. The cranks are different and are balanced different. Plus the bores are different, along with the rods.
The 400 was hard to keep cool I owned 2 and cracked the blocks
☝🏼correct answer of why they were and never will be as popular in the street rod world
Plus Smokey didn't give it good reviews. Back then he was VERY influential, and his opinions made it or killed it.
That 400 is a freakin’ beast.
It really is, if only Id known in the 80s
Shame GM never added a lil more meat to those blocks and based their LT1 off it...guess nobody would want a smaller sbc so it may have killed sales . Perfect bore/stroke
Here's a thing about the 400 blocks. 1970-72 all had 4 bolt main caps, and could be identified on the outside with 3 freeze plugs on the side of the block, the only SBC so configured. 1973 through 1980 had 2 bolt main caps (big block style caps), and the standard SBC 2 freeze plugs on the sides. The 2 bolt 400 blocks are more desirable for a build than the earlier 4 bolt blocks, they're stronger with aftermarket splayed outer bolt 4 bolt caps.
Back in the day (80s as a teen) we all believed you had to have a 4 bolt, steel crank.
Little did I know a 2 bolt 400 cast crank woulda served me just fine. Didnt know any better
I love that they used stock blocks and cranks for both builds. You have no idea how much internet lore says they will both explode at 500hp.
It's been awhile, but I'd love to see an 87 octane sbc build and compression/ aluminum head limits 😊😊
I second this.
Yes
9:1 with cast heads & 9.5:1 with aluminum heads👌🏼
they already did this, they ran 14:1 and made about 400hp
@@gabrielsturdevant9700 not on 87 octane, not even close to pump gas 😬
The 'freeze" plugs wouldn't have been my "first" question. My first question would be, "Was there anti-freeze in the block?" It was sort a blessing though. You guys created a beast!
I don't know about here, but water is typically used on a dyno because freezing isn't usually an issue. Given that most dyno rooms are climate controlled.
It probably should be antifreeze though. Considering most don't use a radiator on the dyno either.
I bet they don't make this mistake in the winter ever again. Lol
I dropped a performance built 1972 400 4 bolt into an 87 corvette with TPI . The torque is crazy! The car is a rocket with the tune. 400 SBC forever!
Just wanted to say Clay Millican is one of the nicest people I have ever met.unfortunetly I love 20 mins from New England Dragway and our national got rained out this year so I didn't get to see Clay again,but he meets thousands of fans every year and he remembers me by name every year.
640+ hp out of a 406ci small block Chevy is awesome. Great numbers for an old mil. Best of 🍀luck guys, thanks for the post.
I love these 400 it's what I have in my 79 tube chassis camaro. Factory oem block with a splayed caps going 9.00s no spray no boost
Saturday morning let's go.
I used to be upset when I missed power block on Saturday seem back around 2000 there wasn't squat for car shows and basic cable sucked at least when I got digital premium I was able to get speed channel I thought that was awesome were to spoiled now.
@@95Sn95 I hear that, this is probably good to cast to the TV in the garage when your buddies are over.
I loved my 406. It had KB125's, mild rv cam, lt-1 type intake. A beast.
I love those 400 sbc motors. I didn't know there power was that low thow from factory. I have 2 friends and they always wanted me to find them the 400 sbc engine so they could build them for racing. I had one in my truck I built once. I bought a 82 I think Chevy pickup 4 by 4 and I put a box and cab on it that was a 70 pickup truck. It was a turquoise color. I looked cool when I got it done. Only took 2 days to change the cabs and boxes out. I put a 4 inch body lift out of square tubing and had 36 inch super swamper stl on it.
You guys do awesome work, and I was amaxed what the 400 made stock. Chevy had it right for big car and truck use.
Ya it made 454 TBI numbers! And that was net hp with all the accessories on!
I have a 71 400 sbc in my 4 speed 1969 Beaumont making 525hp with a set of dart iron eagle heads. Love the torque
Note to self - use anti-freeze in the dyno room!
I don't think they have the for thought for using antifreeze!
Dyno rooms aren't suppose to freeze in woke Kalifornia...
@@BuzzLOLOLI'm pretty sure this studio is in Tennessee
Dynos don’t use antifreeze just straight water
@@stevenhoitz9260 yeh, I know. That is why the water froze and busted the engine block - ant-freeze would have avoided that issue. Cheers.
100 foot pounds more at 4000 over the 350
and 200+ hp at 4000 over the 350
.
this is why i LOVE my 400s (even if they are low comp "stock" motors)
No mention of the Siamese bores? Steam ports? The few things that make a sbc 400 different from other sbc from a builders perspective?
I sure wish I would have dynoed my 406 back in 1995. Wisco 14.5:1, 6.0" H-rods, AFR 220 64cc heads, Lunati solid roller cam, Victor E intake, holley 850cfm and it ran lean as he'll all the time. Twin holley blues on 1/2" lines struggled to keep up. '65 chevy II, 350TH 3500 TCI stall, 488:1 rear. 9.54sec @145mph
I always guest it was a 750hp motor.
This is one of y'all's best builds!
I've always been told the 2 bolt main 400s are actually known to be stronger. For example the 509 casting blocks
Yes, the later 4 bbl. blocks have windowed main bearing supports...
They are, by a little. The reason is the block webbing is the same for 2 bolt mains, as for 4 bolt mains. The only thing different is 2 extra bolt holes. Without them, the webbing is solid, thus stronger.
I want you guys to build my 351 Cleveland. I'll buy all the parts if you want to feature it on TV. So far I've got Trickflow heads. Still got to buy Eagle 4 in forged rotating assembly, cam & edelbrock air gap intake manifold.
Yes the 509 blocks are stronger!
Whether it's a 350 or a 400, I'll take a 2 bolt over a 4 any day. If I need the strength, it's better to have the mains splayed than have a factory 4 bolt
One of the best motors made..I ran one of these in my 69 nova .it was really strong.
Really enjoyed you showing crankshaft balancing. Wish more channels would show this and how important it is.
A 400 SBC especially with 4 bolt mains are like hen’s teeth, would make a great pump gas street engine with 10:1 compression
Back in the day my good friend was a truck puller, in Super Stock class his weapon of choice was the 406...Nascar 350 block punched .030" & Lunati 3.75" stroke crank, heavily ported 202 doublehumpers, came that had over .900" lift, 6" aluminum rods, 14.5 compression & 750 double pumper on alcohol..she was very stout!!!
41:46 this is a good opportunity to show the before/after benefits of porting the heads.
I would think its Good Practice to Deck that Factory Block, its old,it was done a long time ago by old machines,deck heights are probably different,probably not 100% flat, plus cometic gaskets require a certain RA finish....but great job as always Powernation..
Agree. my brand new GM block was out a few thou on each side
Earlier blocks esp after decades of use can be out a bunch.
WOw that is BBC power! Cubes fit the intake heads perfect.
Thats an old grind but it works great in about anything
Imagine if GM used these for performance apps like the LT1
Anyone like me, wish they would have done dyno stages, with this 400? Example: This stock= stage 1, then stage 2= put the aftermarket intake, and 4brl. carb. from project compression obsession, then stage 3= Add the Big 1in. 7/8 dia, Long tube hedders, with a 3in. Dia., 18in. Long, collector extension. That would have been Awesome! Plus then when they rebuilt this 400cu. In., into a 406cu. In., added the roller valve train, and Afr 220cc Eliminator cyl. heads, we would get to see the 200 to 250Hp increase!
Hit that joker with a 150 shot you knocking on 800 hp. Definitely a LS killer in the right chassis
That sounded beautiful on the first pull. Great work. Also, 406 is an old Ford displacement from the early 60’s. That poor motor with the BRG paint doesn’t know what it is. 😊
Pat and Frankie do a great job! I like watching these guys. Lotsa knowledge.
Congratulations on another excellent build with impressive numbers.
Love these guys! Very informative and they do things right, always!!
Old school like the rest of the build
You should have ground the top of the center oil gallery, because some double roller timing chains will knaw on it and put tiny flakes of metal in your oil. You fellows better get some one in the shop with more know how!
I wonder how many people learned that "freeze plugs" ARE NOT freeze plugs. They are actually supposed to be called core plugs.
Just like the "harmonic balancer."
It IS NOT a harmonic balancer, it is a crankshaft dampener 🧐
Clay Millican is one of the nicest guys out there .
My 406 SBC with Canfield aluminum heads full roller setup with the stock 2 bolt mains block and factory cast crank 11.125:1 compression was a 600+ HP engine all day long and drove to the track, raced all weekend long and always drove it back home! It was amazingly powerful for its weight, and definitely durable with the thicker webbing of the 2 bolt block and siamese bores of the 400 it makes them pretty damn tough blocks. The larger mains of the crank is also a good benefit for strength, even being cast. The only thing that I changed to from the factory design was the 5.56 to the 5.7 rod length, and clearanced the block and rods for the big roller camshaft. This is the only issue one may have. With the larger dimensioned crankshafts of the 400 and going to the larger lobed camshaft, stock rods you may not have too many interference issues? I know aftermarket beefier rods at the big ends have a chance of contacting themselves in certain degrees. So it's vital to check this out more than once and making sure you have a minimum of .020 clearance between your rotating internal parts. The only issue I ever had while racing was pumping the oil pan dry around 3/4 the way down the ¼ mile. This was self inflicted though, using a high volume high pressure oil pump and a stock capacity pan was a bad combination. And this was with crank scrapers and all the oil return passages were cleaned up and enlarged before assembly. This though didn't make much difference. Adding a 8qt pan and Swapping back to a stock type oil pump it would still start to cavitate the pump around the end of the ¼ mile and I would watch the oil pressure dropping off around mid track, while going through the traps at almost 20lbs of pressure @ 76-7800 RPM'S. It never hurt the engine thankfully, but the problem was the oil flow for the original hydraulic lifters which wasn't really required for my application, so the engine was pumping all its oil up to the top end of the engine and it couldn't return fast enough by gravity to the pan. The answer to this dilemma was oil gallery restrictors and my nightmare was over! It was amazingly different afterwards and oil pressure was no longer any problem or cavitation wasn't a problem I mean. 😊 Otherwise they are fantastic engine's for street or strip or even a daily driver with weekend warrior thrills LMAO!
Wonder if a windage tray may have helped you
If the oil gets whipped up too much (aerated) it can wreak havoc on hyd lifters possibly cauing P to V interference .
If I build to run over 6k often I always go solid to prevent it. To each their own
Those are impressive numbers. The flat curve of the torque is super impressive. But more appealing is the budget GM block & cast crank!!!
You guys are living the dream, I can say that cause I am so old.
When I was a kid $10 Grand would get you a stomping competitive mill.
Atomic engines and B & M but alas so many places to noodle away the cheddar.
The Old Frozen Engine Block Trick !!
2 bolt 400s are supposedly stronger than the 4 bolt plus you can install splayed caps on a 2 bolt block and 400s are notorious for having out of round cyclinders, i rerung a 406 as a ladt ditch effort and even tho the bore looked nice from the dingle hone it had bad blow by so it went in the corner and replaced the engine in a tube chassis vega wagon with an old stock 283 just so we could go to the strip, we tossed 305HO heads on it with a nice big cam and a dz302 high rise intake to try n wake it up some, it would pull the wheels effortless and run low 6s in 1/8th with the 406 with camels vic jr and big cam but with the 283 let go transbrake it would chirp n go very smooth steady and slow lol and ran around 8.5 not fast but better than sitting home.
The 2 bolt blocks are stronger due to the fact that the 4 bolt blocks are notorious for cracking between the main cap bolts .
@@HowardJrFord THey can crack from headbolts also thats common .Some tap steam holes and screw in a plug, drill a hole to make that area a little stronger
This would be nice in my Trans-Am. . Yall are great engine builders.
My last 406 had hyperutectic pistons. A 480 lift cam and 492 gm double jump heads. 750 Holley. That thing made enough power to put a 3800 pound 87 monte carlo into the high 11 second class. Give me 400 or nothing.
Good old school combo. dual plane 280 cam headers youre hauling azz
Really thought that out devels in the details Pat you the man!
I actually found a 511 block with 2 bolt mains ... i was puzzled until i looked at the date it was made ...very late 72 ! When chevy begin changing to 2 bolt mains . The numbers for 2 bolt block are 817 and 509 .
ill take the 400 over the 350 any day of the week
More to start with, for sure.
Love watching you two work together. A genuine team that gets great results and has fun doing it. Congrts guys!!!
The 406 picked up way more mid range torque over the 360. Goes to show the heads are too big for the 360. That's a good driving 406!
Not the heads, the cam.
We all know that torque is never affected by stroke either.....right ?
It's an apples and oranges thing, the definition of bigger is "more" , ya feel me ?
If they had put in longer rods it would have had even more torquies.....know what I'm sayin ?
Of course it did, 46 more ci. Thats 13 %
@@jamesroberts1800thank you, I was thinking the same thing.
@@jamesroberts1800 - Torque is little affected by stroke or rod length, but varies directly with cubic inches... Torque 'characteristics' change a mite by stroke and/or rod length...
It doesn't show that at all 😂😂 it shows what more stroke and cubic inches will get you. Doesn't tell you anything about the heads
Also, love the British Racing Green choice for the block and covers.
I’ve watched a lot of these shows and these two together are the best…I hope they stay grounded and keep putting out videos. People like muse need this type of “entertainment”/actually, knowledge! 😊
2 of the best engine builders I've ever come across,, well done guys, top quality workmanship
I love your comment on the core plug... In the early 70's, in trade school, that was one of the catch questions on an exam. They drilled it in our heads over and over and over; There are no "Freeze/Frost" plugs on an engine, they are "Casting or Core" plugs which are necessary to remove the sand from the hollow part(s) of the casting. They were never intended or designed to prevent damage due to freezing of the coolant inside of the block. Thanks for asserting and clarifying this for the viewers.
Agree...Dart little M block...shocked at all the metal floating around in the water jackets thank goodness I checked and cleaned th eblock out. Woulda killed a water pump fast
Blew a plug out the side of my last L98 block due to a head gasket slowly letting go.
That was pretty impressive
Love your work boys, as always😊❤
Love those 400sbc. Can't believe how clean those cylinders were. Considering the rest of the motor.
Saturday morning small block church! 😎👍🏼
Hey maybe grandpa really did pull the front wheels enough to jump over Coke cans. 😁
You didn't mention anything about the steam holes in the block or heads "siamese cylinders" . Did you drill the heads or not
That was my question I wanted answered also. I've drilled steam holes in all my 400 projects.
Needed more for daily driving than racing and WOT dyno runs...
That's so awesome that you picked that color, that is seriously the color I'm going to paint my 65 skylark
Love the 400 build. A lot of us Hotrod them . Thank guys.
Excellent show Guys!
I had a 2017 F150 3.5L eco boost. It was a torque monster and towed my 10000lb trailer awesome. If this new motor for Ram is anything like that it will rock.
The machine’s you all use are amazing omg.
My favorite channel!!! Love the stuff you guys do!!!👍😸
Turn that huge ac compressor on and see how much it loses.😂😂
Probably a loss of 50hp
I would not turn it past 5000 with the AC clutch engaged.
@@Dr_ReasonI’ll turn it 95 all day…😂
Yeah, that huge ac compressor, and pull a loaded dump truck and see how much it loses, and disconnect a couple of spark plugs and see how much it loses. All of which have nothing to do with maximum dyno hp tests.
@@nojunkwork5735😂😂 thank you
Yall are great engine builders
Man, I love this show.
Tommy put that engine back into the Caprice forget about LS. Mr. George how much is the LS no that's too much. 🤣 All jokes aside I like a 350 stroker or 406 because they're easier to get decent power a low-budget.
Love your colour choice. I envy all the toys you have to play with.
Yall should do in house power mouse with that procharger, the one yall built with mike galley
Would have liked to see the numbers a cam swap, fresh timing chain, headers and four barrel carb would have done. I got a 400 and that's all I could afford years ago and it was a torque monster
Just adding a 4 bbl. would bump it over 300 HP with headers... was hoping they'd do that...
@@BuzzLOLOLme 3
I’ve been watching this show since 1998, when it was called HotRod tv, I’m still waiting to see a 292 duration camshaft used in a engine build.
Remember late 80s? The typical 390-400hp recipe was 11-1 350 ported camels vic jr 292 cam .Loved the Isky version over the comps. Needed plenty of gear or it would be a pig
love Engine Power!!!
Maybe a little bit of antifreeze this time round?
Right??? The solution is right there in the name of the stuff...
Engine dynos don’t use antifreeze they use straight water
@@stevenhoitz9260 then drain the engine when not in use or don't be lazy and remove the engine from the dyno.
@@1Phoenixfire idk. If it’s actually a dyno mule like they said then it probably stays on there. Plus if it’s a heated room then you wouldn’t worry about it freezing
Come now stop making excuses for them
Sillicon, not all 72s were 4 bolts, my hubby found a late 72 built in november, k date, that was a 511 number with 2 bolt mains ! Most 2 bolts numbers were 817 or 509,, thats last 3 digits of casting num. On bellhousing end of block. Most 511 blocks are 4 bolt but pull the pan to be sure, also, some 2 bolts have 3 freeze plugs, hubby has shown me !
Yeah I'll take one of those engines. Nice build guys.
Nobody mentioned if you guys drilled the cylinder heads for the 400's steam holes?
Great engine combo 👍🇦🇺
I forgot to put in coolant before winter and did the same thing, 4 vertical cracks, 2 on each side. I just took the grinder to them, filled and covered them up with JB Weld and ran it trouble free for another 3 years before I upgraded my valve train and spun a couple bearings on the crank journal. I'll pay for shipping and give you the scrap price for that block. Lol
Would like to see a Mopar 440 build pump gas , hydraulic Roller cam , 270 max wedge Heads !!
these guys only bend over for chevy and ford.
I'd like to see a low deck 400 to 500 inch with a 4.150" stroke with a 6.760" rod build; specifically with 7000 RPM in mind and hydraulic roller with short travel lifters.
Comp would be ~ 10.5:1.
There used to be these aluminum Stage VI Mopar heads that had raised ports. On a low deck any RB intake would bolt on with no mod. With those heads on the RB, spacer plates needed to be used (similar to when using B intake on the RB except in this case it was vice versa). Those heads flowed 330 CFM unported (IIRC) and a MW variant was available that flowed 350CFM. Summit still carries a listing for them but billed as 'order' I think and they 'ain't cheap being about $2000ea bare - ouch!
Problem with low deck is the lack of intake manifold range that the RB benefits from. Those heads solved all that, so you could hypothetically run a 426 MW cross ram intake on a low deck without mod (not that you'd want to since they flow 70CFM less per runner than a bare head with no intake, making it in the middle of the intake in the test lineup of 12 intakes and at the bottom of the top 6 intakes of Dec 2006 test as evidenced by a Mopar intake manifold test from Hot Rod magazine). They flow a measly 280CFM per runner - again the lowest of the top 6!
Google, "Mopar Engine Intake Manifold Comparison - Max Wedge On The Bench."
What did you do with the “steam holes”
I love this build
i love a 400 , i built a 73 400(out to 406) 2bolt block with the splayed main caps stock crank and rods wth new hypertectic pistons but issue's with sump leaking and steering hitting high volume sump meant it came out one to many times and i decided to build a 400 dart block(no water jacket between cylinders ) with all the new goodies like scat crank and 6" rods Wisco pistons with raised gudgeon pin holes roller solid and afr 228 heads crane rockers ,bushed roller lifters ' ive only had it started a couple of times and it sounds awesome through 24" hot dogs
love watching!! great show
This one is a great build . . . nice one
Love Clay's Hollwood smile, top man.
Has anyone else noticed that they did not drill steam ports in those heads????? It's a must on a 400 to cool the Siamese cylinders... I see burnt pistons in the near future for that engine... Correct me if I'm wrong!!!!!
Awesome color looks military an thanks for the great information tips
I was seriously curious about this one, as I run a 400 SBC as one of the engines in my 71 Camaro (the other is a 383, and the two short blocks share the same heads, intake and carb). It's not built as beastly as yours, but it has insane torque.
More cubic inches is gonna make more power
cadillac 500 cubic inch rolling around with 125hp be like@@jjmccloud
Great information, thx!