Do You Have a 400 or a 351M?
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- čas přidán 7. 09. 2024
- In this video, I show you a few ways to figure out if you have the 351M or the larger 400. Thanks for watching! Don't forget to share, like and subscribe for more. And as always...Stay Krazy!
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Those 400's have a ton of potential and make excellent engines for heavy vehicles like the Bronco.
Im excited to work on it for sure. Not exactly sure what all I'll do but the 2 barrel and intake are definitely getting ripped off and put on a shelf lol. Thanks for watching!
I have a 78 bronco with a 400 and a 3 speed C6 and it rips for only 160hp in such a heavy truck
Crankshaft and piston will be different. I built my 400 out of my original 351M using T.Meyer high compression piston set, I found a 400 crancksaft on the web and summit racing was the source for everything else, dual plane aluminum intake, 650 cfm Eddy’s carb, HEI ignition set up from DUI, dual electric fan.... oh RV Cam ... all and all I ended up with a torky Monster with 9.6:1 SC that only likes premium gas but I’m ok with it and I love it ..capable of pulling a palm tree right off the ground.
I came out with a 351m/400 engine from a 78 f250 camper special, it’s a 6.6 L
A prius could pull down a palm tree, they almost have no roots. But I know what you mean.
@@DumbCarGuy i dare you to try … I’ve done it a couple of time and they are tough to pull.. good day!
@@calevel no problem. Next time I’m in Florida and I happen to have a Prius handy I’ll give it a rip
😂😂😂😂😂😂❤😅@@DumbCarGuy
You forgot one very easy way to tell the difference. Just look at the balancer,if its thick it is a 351, thin is 400.
You are backwards on that. Thick is 400.
4th digit of the VIN
H….351 Modified
S….400
Nope
Assuming you don't have the stock harmonic balancer to compare, pull one spark plug and use a wooden dowel rod to check the stroke by hand turning the crank with a breaker bar. Four inch stoke is a 400, anything around three and one half stroke is a 351.
As long as it is a stock crankshaft correct
This will definitly work on a 351m with 400 crank?? Need to know. Makes cents though. Supposedly (my) this M i have has a 400 crank, which would make it a full stroke 400. Will see...
@@JRS2791 A quick search yielded the following :"The 351M uses the same block and heads as the 400, with a shorter stroke crankshaft (3.50"), the same connecting rods, and a unique piston with a taller compression height to compensate for shorter stroke with the same rods in the same block." In summary, what makes a 400 is the crankshaft and pistons.
My 1977 Ford Ranger 1/2 ton 4x4 has the original 351M...Runs great....more then enough power for the truck.....regular oil changes and service does wonders.
It sure does, no matter what the manufacturers say. Thanks for watching!
You'll get a lot longer life out of the 351 M / 400 engines, (fewer valve jobs) if you run half premium and half regular.
What kind of oil pressure ?
Sorry Guys. . . The 351 Modified was built at WEP#2 (Windsor Engine Plant). The 351W at WEP#1. Summer of 1977. When I started working for Ford. Piston & Rod assembly/Piston House in WEP#2. The Windsor Casting Plant (WCP) was next door. The cranks were cast there.
round headlights only came in that grill in 78 and on the custom level trim truck.
I like this body style better with the round lights. What about?
there's the earlier version split grill 73/77 with round headlights nd 2 types of inserts. then the 78 custom had round headlights. custom 78 only in the one peice center type grill.
1978 built in 1977 has round headlamps
😂😂😂😂😂😂❤
Good video !!!
Ford blue thru and thru.
FE engine -franklin Michigan engine plant.
351 Cleveland - Cleveland Ohio engine plant off of brookpark Rd out by Hopkins airport (My hometown)
351W - taller deck than other Small blocks made in Ford's Windsor Ontario engine plant.
351M/400 - a engine family of itself the 400 is the only square engine gas or diesel I know of (you were right on !!!)
I believe made in Ford's Cleveland Ohio engine plant ???????
Customers liked the 400 but were afraid of poor gas mileage... And wanted a 351 displacement engine for gas mileage improvement ???
So Ford remachined the cranks from 351 W stock supplies and fitted it in the 400 block with longer connecting rods which made it a 351 cu in engine by modification !!
Hence the designation of
351 M and now you know.
You take care and all the best to you SIR !!
I wasted money trying to make the open chamber heads work when I should have just got some Cleveland or aluminum closed chambers.
From what i understand it is really a 400 cleveland, I know the 351 m is known to be a dog mainly due to the smog regs, but i think the 400 is a bit of a sleeper as long as theyre not saddled down with smog regs like the 351m. At least thats what im hoping.
400 is smog and a dog but with 351C flat top pistons bigger cam with 4 battle then you got a badass!
351m has differant pistons and crank. not just the crank.
If you have a Snap On timing wrench for the 351M / 400, I would like to know if it is a F 8564 B, or what Snap On part number the wrench is, so I can buy one.
Thanks.
I’m just happy to read through the whole thread without seeing some silly fukker call the engine a 400M😂
Wow so much wrong in this vid . The 400 Block uses the 351W crank journal and rod journal diameter NOT big block. The 400 FMX block has the small block bell housing pattern. The regular 400 block uses the 385 series bell housing pattern. The 351M is a 400 with a windsor crank and tall pistons. There is NO way to tell a 351M from a 400 externally you HAVE to measure the stroke. All the emissions sticker tells you is that it came off an engine of that displacement ir does NOT guarantee that is what it is on now. The 351M is a pig of an engine and is in Fords top 3 worst of all time. The best thing you can do with a 351M is convert it to a 400. ......
I like how you said you were going to say why its called a 351m but then explain the reasoning shortly after.
No 😂😂😂, just stick A WIRE IN IT 😂😂😂😂😂
It's almost impossible to check stroke via spark plug method. Piston angle vs plug angle vs the dangle is too steep. The dowel or rod will shift during rotation and can get hung up and not be accurate. The for sure way is to pull the pan look at the crank. The counter weights are almost the same with the 400, 351M counter weights are smaller especially the second one from the front. It is half the size of the front counter weight.
I have checked several with a 6” ish piece of bare copper wire and breaker bar. It is close enough you can tell.
My parents 1978 Ford Thunderbird Diamond Jubilee edition had a sticker under the hood that said 351M/400B which I think meant 351 modified, 400 block.
351m/400 is a 400 big block with a 351c stroke. I have one in a 1977 f150
That's the easiest way to explain it as far as I know
@@jeraldmorrison4775 I just bought a 1977 Ford with a 351m. Plan on sloooowly going through it.
@jeraldmorrison4775 absolutely not a big block.
if the coil has not been removed before, there should be a metal tag with displacement on it, and year, and some other information
the tag is held on by the coil support bolt
Cool, I'll check that out! I bet its long gone on this one lol. Thanks for sharing!
The M is for modified and to differentiate between a 351W and a 351C. The M only applies to the 351. Ford only made 1 400 and 3 351's. Thus the letters for all the 351s
I work for ford and have since 79, the M stands for modified.
Idk why so many people have trouble understanding this
and no such thing as a 400M
Very chocked down motors I have one had it for years in 80 150 4x4 I'm not happy with the power but it is tough it don't oil worth a crap either
Jake, would you know what Snap On part number would be for the timing wrench for the 351M / 400 ? Would it be F 8564 B ?
A nice build for stock compression engine is a 268 comp cam and valve spring a weiand or edlelbrock intake 4 v and about a 600 to 650 carb in a heavy truck in a 400 should give you about 400 hp and 450 torque rhoads lifters help
Hillarious. Your lucky to get 300 HP outta these pig slug 400 M crap
@@eddiespagetti8395 so are you hot rod mag did the same build with a 2v carb and got 385 hp
@@sorshiaemms5959 good luck ya after blow 5 grand in parts maybe. Hillarious slug motors
@@eddiespagetti8395 ok mr know all chevy man ill believe what ever you say about Ford motors
@@sorshiaemms5959 hillarious. GM sucks. I know ford motors. These are fords worst V8s. Yes they are. You a sheep 🤣🤣
Some 400 blocks were small block bellhousing in 1973 only
Negative
Same as 429 460
The 351M, the M stands for Modified. I don't know how Ford came up with that. I rebilt one over thirty years ago. The parts supplier at the time said that the M stands for Modified.
I use to call it morphodite. I had a 1979 farm pickup with a 351M that took the main bearing out at 34,000 miles. Short blocked it and that took the crankshaft bearings out at 35,000 miles on the replacement. God smiled on me when a NAPA deliver truck with a 400 did a few flips in the ditch and that engine went in my truck and was going strong at 50,000 miles when the truck got sold. Their were reports of oil pump problems that I learned about after the fact. Probably the oil pump got switched between the 2 engines and condemned both. Hindsight is always 20/20.
The heads on the 400. Killed its power take the smog heads off it and it will come alive
Any 70s smog motor sucks. The heads are OK they are Cleveland 2v. The cam and timing gear were severely retarded. To make a 400 run good rip off all the smog crap, install good double roller timing set, a good dual pattern cam and matching valve train, 4bbl and headers and shell come alive.
Put a set of GT40 Explorer heads off a 302 on it find a 96 to 2001 Ford Explorer intake the GT40 heads off and put them on that baby wakey wake compression cheap budget get up
This is going to be good😅😊
I have one in a 80 150 4x4 few years ago I added alum intake and a Carter 650 it helped but probably still only around 200 hp it don't oil worth a crap either even after a compete rebuild but it is a tough motor
Tim Meyer makes grooved cam bearings that will fix the oil pressure problem.
HV pump, chrome molly shaft, 8 quart sump pan. Fully grooved main bearings if you are willing to buy two sets of them.
Its a good truck engine, plenty of torque but 175hp is pretty low....
Yeah you aint wrong there lol
Malaise era, what do you expect?
I heard you say you don’t care what the m stands for but it’s for modified
Thats what I think too but people say otherwise.
@@k30krazy yeah but what other people “think” makes no difference, anyone with any sense at all will know that the 351m is a 400 that’s MODIFIED to displace 351 Cubic Inches, so 351 MODIFIED. Remember, it isn’t about what people think, it’s about what YOU KNOW
@@warrenmcelroy4718 yes. Ford had to designate it as "M" so it was not confused it with the Windsor or Cleveland. And there is no such thing as a 400M.
@@todsimpkins8908 drives me nuts when I hear someone say 400m
Hi,
1978,79 bronco and on came with 300 cubic inch straight, 302, 351, 351m( modified 400 heavy block and heavy crank with 351 bore for pistons), 400 and 460 cubic inch V/8. 351m is the one I had. A Very good engine. Not good on gas mileage. Aloha. Roger
Nothing gets good gas mileage that’s fun to drive
Smiles per gallon is what it's about lol
The '78/'79 only came with the 351m or 400.
The other options you speak of weren't available until 1980.
The first generation is a whole different story.
No 400 after '79.
The Bronco never came factory with a 460 ever.
I'm glad you are interested in the hobby, but you shouldn't post inaccurate information on a respectable channel like this one.
actually with dual exhaust and proper tuning they can get fair gas mileage with power it was the cheap ford muffler that killed that
@@kellyh4035 you could get a 400 in a ttb bronco up to I think 1982 then the 400 was gone.
I have a 400 in my 71 hi-boy good running engine!
5:22 😂 I need one of those too !
I'll save you the trouble of explaining the M in 351M. Lotta people believe it stands for Modified where it's a 400 and 351C (from what I was told) pretty much jammed together into one block BUT it's also believed it stands for "Michigan Casting Center", the factory where the blocks were made. I guess it depends on what you prefer to call it, there's really no wrong answer between the two. It's pretty much a V8 with parts from another V8 design and that they were made in Michigan so really, both groups of people are right. I call it a Modified but who cares. It's a good engine for hauling and if they're taken care of, they'll last a long time, same with the Windsor and the Cleveland. Only things I don't like about the 351M are the oil pan, how long the oil sump is and where the sump is located. Makes changing the pan gasket a headache.
M stands for Morphadite.
IF you have a Snap On timing wrench for the 351 M or 400, and know it fits the distributor bolt, I would appreciate it if you could give me the Snap On part number,. I see a lot of F 8564 B wrenches on ebay, but no specifics as to whether they fit the those engines. I have two Mercury wagons, one with the 351M and one with the 400. Thanks, Tom in Miami
Im thinking about swapping the old 351m on my 78 f250 4wd for a 460.
We've also thought about it lol
I got a 351m in my 1977 f150 ranger
Gonna get a 72 400 with 35k original miles, came outta Ltd gonna put it in my dads ranger....
I put up video not long ago asking this question I have a 79 f150 ranger
I'm wondering if my 351 is a 351m , it has the 400 cam and performance pistons etc sounds very deep but revs very high
might be a cleveland/ 351C
hello all, thanks for the video love the fords!! So the 351m is modified from what I've learned theirs a Windsor Cleveland and the 351m same heads as the boss 302 which are interchangeable just have a water jacket cut and a special intake the heads are from the 400 and will fit on a Cleveland the stroke for the 351 is like 5 somethingish or 6ish the bore is the same as the 302 the c6 trans can fit on the 460 bellhousing the crankshaft bearing is monster huge compared to the 302 you have a 351 modified 400 same heads as on the gt40 I think something something gt40 somewhere in the line of the 5.8 redheaded step kid engine id have it blue printed its worth it
Can I have some of that stuff you've been smoking.
The 96 to 2001 Ford Explorer 5.0 came Factory first era was just a GT40 head on the 5.0 302 in the Ford Explorers then a few years later they went to a little more compression head call the gt40p which have 4 bars on the front of them to identify the GT40 head has three bars gt40p head makes little more compression has 4 bars marks on the front of head so you can identify them
@@shawnlibby675they were also on some of the Mercury mountaineers 5.0 engines of the same time
I have 3 Cleveland blocks and 3 sets of heads on top of the one under the hood... I will stick with those...lol
So your the one buying the Cleveland’s up
@@lrsgaming9184 this is gonna kill ya but I got them free...
@@lrsgaming9184 i watch Craigslist free and they pop up from time to time
They modified the heads and pistons for lower compression….. damn epa. I would assume in my opinion that’s where the “m” comes from. The 400 is in that family, but doesn’t carry the “m”. The 400 is a stroker block.
Wrong what he said in the video was correct Ford came out with the 400 to replace the 390 and they need sum to replace the 351 Cleveland so they destroyed the 400 and called it the 351m for modified because it’s a 400 modified to be a 351, the 400 is not a stroker
It's the other way around. 400 was never considered by Ford as a stroker block. But the 351m was a modified destroked 400 block.
Fords own literature is where I read that.
351 Modified , modified from the 400
Or you can look at the VIN number and figure out what's in there
Your history is off on the 351, 400. Ford actually built the 400 replace the 460, the original design of the engine was capable of 500' foot pounds of torque, The block is based off the Cleveland with a big block bellhouse and bolt pattern. For the idea that it was gonna be smaller and bit lighter with better fuel efficiency than the 460. but thanks to the EPA it become a 169 horsepower boat anchor. M represents modified. A destroked 400.
Your information is wrong too.
What other year Broncos or trucks came with the 351m/400
I have had 1978,79,and 80 with a 400 in them.
According to my research, the 400 was introduced in 1971 and the 351m in 1975 for cars. They were introduced in the tucks with a stronger block and truck specific parts in 1977. The updated block was put in the cars for 78. These engines were available in cars through 79 and trucks through 82.
@@k30krazy 351m was avilible in trucks ann broncos until 84
My 77 F-150 has 351M
'82 was the last year, the F series had the 400 as the biggest engine until after '83 then the 460 was available and the 6.9l diesel came shortly afterwards.
8:48 or just start it up and listen
Nope. No dowel pins. Not on mine anyway.
Mine shows 401 cubic inches 6.6L
You have a Pontiac.
@@rolltide9547 Buick nailhead 😂😂
I have some of each. the 400s run better. but I also have. 300, 390 410 460s.
Awe that 410fe you got there, you want to part with it? Also if you have a 4x4 transmission and mounts I'd buy that too.
The "M" stands for modified, referring to the modified Cleveland.
I agree. Some people apparently don't 🤷♂️
@@k30krazy It's a well known fact.
I'm just old enough to remember when they came out. Lol
@@kellyh4035 Modified 400, not modified Cleveland.
@@projectmayhembronco5457 That is not a factory destination.
Or maybe it's a 400m
Neither I have a 460. L
351 m is for modified
Midland
The only engine worth a dam in a Ford truck that year was the 460 mine kicked ass for years loved gasoline ⛽
I'd be lying if I said I didn't think about shoving one in there
The M means modified
I agree. Some people don't lol idk
Michigan it means it's made in Michigan
It means modified 😂😂
Slug engines. Fords worst V8s these 2
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