351W and 351 Differences????

[vDawG]

Looking for info for my v8 swap. I can't find a definite answer but it looks like the M and W use the same blocks but different internals.... the W heads creating more of a valve cover/ heater box clearance issue. Let me know your expert opinions fellas. Thanks!

 

[Snoranger]

Looking for info for my v8 swap. I can't find a definite answer but it looks like the M and W use the same blocks but different internals.... the W heads creating more of a valve cover/ heater box clearance issue. Let me know your expert opinions fellas. Thanks!

They are different blocks. The 351M is based off a 400M block. It uses a big block (429/460) bell housing bolt pattern.

 

[85_Ranger4x4]

They raised the deck height on a 302 to come up with a 351W.

They raised the deck height on a 351C to get a 400, and then they destroked it to get the 351M.

Not really sure how a 351C and 351W compare sizewise, but the 351M/400 is huge... similar to a 460.

351W is the best of the bigger sized engines to put in a Ranger, they are a lot smaller than the 351M/400 and have a lot more aftermarket support than the old 351C.

http://en.wikipedia.org/wiki/Ford_Windsor_engine#351W

http://en.wikipedia.org/wiki/Ford_Cleveland_engine#351_Cleveland

 

[vDawG]

Windsor it is. Thanks for the quick reply!!!!

 

[vDawG]

Any idea what the sticker on the door should say for 351w?

 

[trail B2]

They raised the deck height on a 302 to come up with a 351W.

They raised the deck height on a 351C to get a 400, and then they destroked it to get the 351M.

Not really sure how a 351C and 351W compare sizewise, but the 351M/400 is huge... similar to a 460.

351W is the best of the bigger sized engines to put in a Ranger, they are a lot smaller than the 351M/400 and have a lot more aftermarket support than the old 351C.

http://en.wikipedia.org/wiki/Ford_Windsor_engine#351W

http://en.wikipedia.org/wiki/Ford_Cleveland_engine#351_Cleveland

well said

One easy way to tell the windsor is the valves are in a row like a 302 the cleavland and m blocks the valve covers art a lot wider with canted valves.

 

[Tedybear]

Check the sticker on the valve cover itself for the emissions. The 351w series is one little snot monster of an engine. (had one in a 77 LTD II back in the day) That engine blew apart 3 transmissions before I went with an FMX series from a 72 merc. (cast iron housing vs alum.)

S-

 

[Snoranger]

I just came across an interesting fact about the 400.

Remember that the 351M and 400 were designed to bolt up to Fords existing big-block (385 series) transmissions. However in '73 Ford produced a small number of 400 engines with a small-block (Windsor) bellhousing pattern, such as the one shown right. Rumor is this was done for the Panteras in case 351C supply fell short. Casting number is D3AE-B, if you think you've got one.

 

[COPPERHEAD85]

Look for a 96 and up 250 van should be a Roller 351W from the info I gather,Baddad457 can help with the year better than me.
If you want years and part numbers .....he is the man!

 

[gwaii]

all the 92up f series and fsb are roller.

 

[85_Ranger4x4]

all the 92up f series and fsb are roller.

I think it was the later ones had E7 heads too which is why they are more desirable.

 

[fordmike1]

all the 92up f series and fsb are roller.

Not on the 351w. The 351w went to roller blocks in 95 and they are used in E & F series trucks.
Also the 351w's use 6 bolt valve covers and the T-stats are in the intakes and the 351m/400's
use 8 bolt valve covers and the T-stats are in the block. 351c, 351m & 400's are dry intakes which
means that they have no water running thru them and 289, 302 & 351w's intakes are wet.

 

[Boggin]

Looking for info for my v8 swap. I can't find a definite answer but it looks like the M and W use the same blocks but different internals.... the W heads creating more of a valve cover/ heater box clearance issue. Let me know your expert opinions fellas. Thanks!

no no no. 351m=400 block. 351m and 400 is huge like a 460. 351w is small block like a 302 or so. 351w would be the way to go in a ranger

 

[85_Ranger4x4]

no no no. 351m=400 block. 351m and 400 is huge like a 460. 351w is small block like a 302 or so. 351w would be the way to go in a ranger

Smallblock by definition.

Same bore spacing as a 260-351W, the extra deck height made them really wide and Ford didn't trust the normal SBF transmission with the 400.

 

[1badexplorer]

A 351M is a truck motor. It doesn't rev very high without mods. If you are looking at buying a complete motor and aren't sure how to tell which it is.
351C's are kinda rare. They only made them from 70-74.
351M's stopped production in 1981.

So if you are looking at any vehicle newer than an 82 it probally has a 351W unless the PO swapped somthing else in. Also a 351W is the only 351 that was offered with EFI if that is what you plan to run a 351W is your only choice. A 351W has the most aftermarket support out of the 3 engines maily because it share alot of parts with the popular 302.