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  #1  
Old 02-22-2010, 11:41 PM
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351w vs 351c 351m whats the best and why

Okay guys 351 Windsor versus 351 Cleveland versus 351m . what are the differences and are there any performance differences.
Which one is the most reliable.
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Old 02-23-2010, 09:06 AM
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The 351W would be your best bet. Most available performance parts and is affordable. Factory heads are restrictive and has a solid block. Toss on some aftermarket heads with a decent intake and let her rip.

The 351C is next but takes a little bit more knowledge to make them go. Decent flowing heads but block is cast weak. Back cylinders distort on an engine stand. Only the 4v heads are good but takes a good custom cam guy to make them a monster from idle to 6500 rpm. Wrong camshaft makes the lowend soft.

351M isn't really worth it. Might as well make it a 400 but by the time you correct the camshaft and boost the compression you would be ahead of the game with a 460. Same exterior engine dimensions and gets the same mileage.
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Old 02-23-2010, 11:37 AM
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Can you put a set of heads from a 351C on a 351W. How about 351M heads on a 351C. Do they fit.I thought a 351 M was a 400 CI.
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Old 02-23-2010, 05:11 PM
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351c motors were only made in North America for 5 years, 1970-74 so they are getting pretty rare.351c 2bbl heads and 351M-400 heads are basically the same casting, the 351M-400 heads cast from 1975 and on have a more restrictive exhaust port than earlier versions but other than that they are very similar.351c 4bbl heads are significantly different than the 2bbl versions as they have much larger ports and have bigger valves (except for some of the ones made in 1974).351c-351M heads physically bolt to the 351w block but there is no factory intake available,there used to be an aftermarket one available and there are some adapter plates around but by the time you finish messing around you might as well just get some aftermarket aluminum 351w heads.400 motors seem to be overlooked, they seem to be capable of making good power fairly cheap with nothing more than some higher compression pistons and a different cam and intake.It is interesting that the majority of the Popular Hot Rodding engine masters competitions have been won with Cleveland based motors.Due to the popularity the cheapest,most reliable way to go would probably be the 351w though.
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Old 02-24-2010, 06:34 PM
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I'd take a cleveland over a windsor anyday, just saying "clevland gave me a lil chub".......but just stick with a windsor they are cheaper
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Old 02-24-2010, 08:21 PM
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So can you get more horsepower and durability out of a Cleveland
Or do you get more horsepower and durability from a Windsor?
Or is there very little difference like a 429, or 429 dove?
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Old 02-24-2010, 09:17 PM
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I think in the end the 351 cleveland would provail in horsepower, but for "bang for your buck" the Windsor wins hands down.
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Old 02-26-2010, 01:19 PM
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i dont think you can really truly compare them to each other... they are all different and are more "specific" for what you want out of a motor? know what i mean? it all depends what you want, then you can say "this motor is best for that"

if you want cheap and reliable there are tons and tons of windsor motors out there, and you can mate 5.0 mustang parts to them i beleive? so you can get cheap power also, theres more options for that motor also.. it's just as popular as the 5.0 so theres lots out there for aftermarket, as they are the same "family" of motor too...

i dont know much about the clevland but i beleive its a pretty good power house motor, and has lots of potential, but more expensive cause there isnt too many of them around?

the modified motor is more of a torque monster than anything, but if you were to go with an M motor go for the 400.. the 351m and the 400 are the same thing just the 400 is bigger, so again more torque. i have the 400 in my 4x4, with some work done to it and i can burn off the 35" tires with the stock 3.00 gears! but after 3,000 rpm or so she dies out... also the 351m/400 use the "big block" bolt pattern for transmition housing so keep that in mind too
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Old 02-26-2010, 01:20 PM
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actually, im pretty sure the 351m uses clevland 4v heads too does it not?? but its still a low end torque motor..
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Old 02-26-2010, 06:52 PM
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I would go with a 351w just for aftermarket, and reliability sake.

I would love a 351C.

351/400m's are one step above worthless in stock form. They are low powered, gass guzzling slugs.

Ryan showed me a link one time where I did some reading though and you can make a pretty good motor out of a 351/400m.
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Old 02-27-2010, 07:38 PM
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You mean this one Sheldon?
Installing A 400M Short-Block Into A 351 Cleveland Stroker Engine - Muscle Mustangs & Fast Fords Magazine
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Old 02-27-2010, 09:12 PM
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Yep you got er Collin!
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Old 03-01-2010, 07:44 PM
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Back in the 70's guys were always looking for the Cleveland engines for the racing horsepower they gave. I never had one. I always had a Windsor. They do have interchange possiblility's with 302's.
The 351 Modified. I was mislead to beleive they were a sought after engine. I have recently learned they are mostly good as work horse engines. Gas mileage is bad, but they are suspose to help with torque power in work trucks.
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Old 03-09-2010, 06:32 PM
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351 Clevelands distorting the back cylinders on an engine stand eh. I happen to know where there is a 351 C 4V from a mach 1 on an engine stand - been on it for a few years. What kind of trouble do you expect to see with this one dueller?
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Old 03-09-2010, 11:14 PM
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It doesn't hurt the block. The problem is when you assemble the engine and torque the heads while the rear bores are distorted. They will stay distorted unless you support the engine differently when torquing the heads. The distorted bores can lead to ring failure and oil burning on a newly rebuilt engine.
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Old 03-09-2010, 11:14 PM
 
 
 
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