need the 351M truth
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http://www.mustangandfords.com/techa...2_small_block/
"The pinholes on Federal-Mogul and other replacement pistons are offset 0.060 inch from center to maintain quiet operation in stock applications. Normally the piston is installed with the notch facing forward (the pin and rod are offset toward the front). Installing the piston backward (with the pin and rod offset toward the rear) reduces rod angularity; the engine behaves as if it has a 0.300-inch-longer rod."
"The pinholes on Federal-Mogul and other replacement pistons are offset 0.060 inch from center to maintain quiet operation in stock applications. Normally the piston is installed with the notch facing forward (the pin and rod are offset toward the front). Installing the piston backward (with the pin and rod offset toward the rear) reduces rod angularity; the engine behaves as if it has a 0.300-inch-longer rod."
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From: KY
On those stock pistons the wristpin isn't centered with the piston. It is offset. Performance pistons are, for the most part, straight. Ford did that to help reduce engine noise. I guess for dogs maybe, I can't hear it. If you put them in backwards you throw the offset to the other side. It will actually give you alittle more torque. Not alot but some. I learned that from a guy that builds engines still today. He as been around for years and his dad did it also. I don't want to give any names out but he very well respected in the racing engine world. He builds only performance motors and doesn't take just anybody off of the street anymore. He is to busy. I haven't ever met anybody as knowledgable about a gas engine. I guess 50 years experience helps. Nascar guys have been know to come to him. He knows several of them.
Posting Legend
Joined: Sep 2001
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The offset being reversed increases the amount of piston slap which makes noise when the engine is cold. That is OK to some people but you should visit some of the newer engine forums and hear people scream bloody murder about it.
Postmaster
Joined: Dec 2006
Posts: 2,866
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From: Rockford, Il
Stay away from that hot rod article we have all agreed that is a huge wasted effort. go to the 335 forum as mentioned and then read all of the hot rod article thread. every post all pages , methinks you will find exactly what you are looking for out of your engine. You will see alot of the above names there talking some great points, and come away with just enough education to hurt. Really though those guys have been awesome about answering my questions, just do your research first. Read as much of the 335 forum you can stomach then have good questions. lottsa luck, Dan
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From: KY
Originally Posted by Torque1st
The offset being reversed increases the amount of piston slap which makes noise when the engine is cold. That is OK to some people but you should visit some of the newer engine forums and hear people scream bloody murder about it.
If a person is uncomfortable about doing something like this then by all means they shouldn't.
New User
Joined: Dec 2006
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From: los angeles
351/400m
I had a 351M in my 1965 Ford F-100.
I liked the motor. Ran strong and very powerful.
I was disappointed with the paucity of aftermarket parts, and what was available was also very expensive.
I had the heads milled, 3 angle valve job and hardened seats, edelbrock intake and holley 4bbl, a nice grind on the crank - wanted to put in a forged 400 crank but couldn't afford it at the time - headers, dual exhaust exiting in front of the rear wheels.
The motor was really ballsy, and pulled that truck like a mule. Smoked the tires on demand. Drank gas like nothing I've ever seen before or since. i wouldn't watch the speedo, but rather the gas guage. Could actually watch the needle on the gas guage move. Ridiculous.
No shortage of power on the motor if you tend to it.
I liked the motor. Ran strong and very powerful.
I was disappointed with the paucity of aftermarket parts, and what was available was also very expensive.
I had the heads milled, 3 angle valve job and hardened seats, edelbrock intake and holley 4bbl, a nice grind on the crank - wanted to put in a forged 400 crank but couldn't afford it at the time - headers, dual exhaust exiting in front of the rear wheels.
The motor was really ballsy, and pulled that truck like a mule. Smoked the tires on demand. Drank gas like nothing I've ever seen before or since. i wouldn't watch the speedo, but rather the gas guage. Could actually watch the needle on the gas guage move. Ridiculous.
No shortage of power on the motor if you tend to it.
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