i keep seeing posts about the 351m engine and also about the c and w. i understand the c is for cleveland and w is of wendsor, these being the respective places each was built, i think.
what's the difference between the c and w type engine?
what or how does the m relate to the c and w.?

 

check out site on ford v-8's. adress,
<a href="http://users.erols.com./wrljet/engines/">http://users.erols.com./wrljet/engines/</a>

 

a 351M(modified), was simply a 400 small block with a shorter stroke. Everything is identical on 400 @ 351M but the crank.

 

the crank AND pistons are different..nothin else though.

Matt

 

RT what is with the address change, I went to the wrljet site and the engine workshop was gone and you post it here.

What's up man?

John

 

I don't know what happen. I had the workshop bookmarked and when I hit my bookmark it informed me that it had move to posted address.

 

Do I have a 351 or a 352 and How do I find out if it is W or C?

Thanks

 

If it's a 352 you'll know because the intake is part of the head. The difference between m, & w is where the water outlett is either on the intake or on the block.

 

>Do I have a 351 or a
>352 and How do I find
>out if it is W or
>C?
>Thanks


If it is original, and your two choices are a 352 or a 351, you would have a 352 in a 65 model. The 352 is an FE motor which is neither a C or a W.

Look at your heads, intake mainfold, and your valve covers. If the valve covers go over onto your intake manifold (in other words the intake is so wide it looks like it complete the head) then you have an FE block.

Clevelands have the block cast out around the timing chain and not a timing chain cover. The Windsors do not have th block cast around the timing chain.

There are quite a few other differences but these are some of the obvious.

Hope this helps

Hio\\\

 

>i keep seeing posts about the 351m
>engine and also about the c
>and w. i understand the
>c is for cleveland and w
>is of wendsor, these being the
>respective places each was built, i
>think. what's the difference
>between the c and w type
>engine? what or how does the
>m relate to the c and
>w.?

 

What I have seen from all the research on my current project is that w has narrow heads very different from the c heads and m heads. Just about the only difference between the w and a 302 is the intake and a half inch more stroke. M has a different bell housing than the 400. and both 400 and 351 M have weak bottom ends... many re-builds don't last that haven't been line bored.
Put a high vol.oil pump on either of these. The application of the M's and 400's were so rare that it is a pain finding parts. But a close examination of the three together and no one would have troubles telling them appart again.

 

>What I have seen from all the
>research on my current project is
>that w has narrow heads very
>different from the c heads and
>m heads. Just about the
>only difference between the w and
>a 302 is the intake and
>a half inch more stroke.
>M has a different bell housing
>than the 400. and both
>400 and 351 M have weak
>bottom ends... many re-builds don't last
>that haven't been line bored.
>Put a high vol.oil pump on
>either of these. The application
>of the M's and 400's were
>so rare that it is a
>pain finding parts. But a
>close examination of the three together
>and no one would have
>troubles telling them appart again.

The 400 and the 351 M share bellhousing bolt pattern. The 351 Cleveland is of the same engine family and it is the one of the three (351C/351M/400 - the 335 engine series) that has a different bellhousing pattern. The 351 C shares its bolt pattern with the 351W and its smaller siblings (302 & 289-most that is - early 289s had a 5 bolt pattern like the 221/260s)

There were actually quite a few 351M/400s produced. The 400s from 1971 through some time in the early 80s and the 351Ms from 1975 until the early 80s. They had a reputation of a smog motor so you do not see a lot of people messing with them today unless it is in the vehicle they have. They can really be awakened by getting rid of the smog junk, some head work, and a few other performance mods. There are also some fixes for the poor oiling in the bottom end (external oil plumbing, restrictors, chamfering of the oil holes in the crank).

The Clevelands are getting quite hard to find these days as they were only produced from late 69 into 73.

You are correct that telling a 351M/400 from a 351 C from a 351W is pretty easy.

 

matt, the pistons and rods are the same i will mail you pistons and rods if you beg to differ.

 

I am looking for any info on the FORD FMX Transmissions if you know where I could find this let me know. I have one bolted up to a '71 model ford 400 C.I. in my 1971 ford F100, The engine came out of a '71 country squire and it is now beginning to give me problems.

 

I have a 79 351M for sale. I have about $800 in it and would let it go for 6. It has been bored 40 over, crank turned ten under, heads rebuilt with stronger springs for the 524 lift 272 dur crane cam, high vol. melling oil pump, cam bearings, freeze plugs, needs dist,have new starter too. Interested parties need E-mail me
at jwink6(No Email Addresses In Posts!) Thanks.