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Author Topic:   351M/400 ???
Bloose
Gearhead

Posts: 621
From: Milwaukee, WI
Registered: Dec 2001

posted 12-13-2004 07:31 PM     Click Here to See the Profile for Bloose   Click Here to Email Bloose     Edit/Delete Message   Reply w/Quote
HEy guys, a while ago we were talking about the 351M/400 having a SBF bolt pattern. Right after that I got a copy of my Legendary Ford magazine (check it out if you don't alreay subscribe) and they featured the Cleavland motors. They mad mention of the 351M/400 and said they were fairly decent motors but they could not be reved very high because of the large 3" main bearings. Don't the 351W also have the same sized main bearings? If so does the W have limitations on RPM's like the M. Do the M's have a limitation because of the main bearing size?

Sort of confused on this so if some one could clear this up for me.

I'm considering a stroked 351W for my wagon, so I'm wondering about the W's limitations. Also under consideration is a 347 based 302.

B-loose

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bifs66
Gearhead

Posts: 250
From: Maryland
Registered: Apr 2000

posted 12-13-2004 08:19 PM     Click Here to See the Profile for bifs66   Click Here to Email bifs66     Edit/Delete Message   Reply w/Quote
IIRC, the early Windsor strokers were made using 400 cranks since they both had 3" mains (and the same bore centers). I would assume that any problems claimed for 3" mains would apply to both engines (bearing speed and friction????). However, it probably isn't an issue for street engines and probably makes for a pretty strong bottom end.

------------------
Bernie Frank
66 Fastback restomod (12.8 @ 112mph)
85 GT (preserved)
2000 SVT CONTOUR

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N266fords
Gearhead

Posts: 1404
From: Spokane ,WA USA
Registered: Apr 2003

posted 12-14-2004 01:36 AM     Click Here to See the Profile for N266fords   Click Here to Email N266fords     Edit/Delete Message   Reply w/Quote
351m/400m have a bell housing bolt patern of a 460 but the crank will fit the 351 windsor and so does the cleveland crank but thats about it the use those cranks to make 104 410 strokers out of windsor blocks.
Hope this helps. Discloser I am not no expert in anyway shape or form just a gearhead is all. Bruce

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Rustang
Gearhead

Posts: 733
From: Clarion PA
Registered: Nov 2000

posted 12-14-2004 07:21 AM     Click Here to See the Profile for Rustang   Click Here to Email Rustang     Edit/Delete Message   Reply w/Quote
There's alot of guys out there still running 3" mains in their windsors and spinning them. Personally I ran my 351 for years shifting at 7200 and never had a problem. Run about .003 clearance, run oil restrictors and a good oil pump and you won't have any problems.

I think until you start spinning them 8 grand or something, 3" mains are not a problem.

------------------
'68 mustang 351 clevor- 10.92@124
'67 Stang, 351W -11.18@118
'69 351C Torino-14.90@100
'78 Pickup 351W-15.56@88
'79 Pickup 460 ET=??

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Bloose
Gearhead

Posts: 621
From: Milwaukee, WI
Registered: Dec 2001

posted 12-14-2004 05:37 PM     Click Here to See the Profile for Bloose   Click Here to Email Bloose     Edit/Delete Message   Reply w/Quote
Cool I was thinking maybe 6000, maybe even a little less. I had heard about the 400's not likeing being reved because of the main size before. When I relized the W had the same main dimensions I was concerned. When I get closer to building a motor I'll have to ask some more specifics about the oiling system. For now I have lots of work before I get to the point of putting a motor together. But if I run across a 351W block for a good price I'll likely snap it up.

Thanks,
B-loose

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