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09-04-2006, 05:46 PM
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CC Member
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Join Date: Feb 2006
Location: Columbus,
OH
Cobra Make, Engine: Shell Valley- 390 FE, 4 speed toploader, 3.50's
Posts: 249
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Not Ranked
Piston wrist pins- floating or pressed?
Just wondering your opinions on the pros and cons of floating or pressed wrist pins. The engine is a Ford 390 FE with forged pistons. The engine will be going to the machine shop soon and I would just like some input from others. Thanks, and Happy Labor Day. 
Greg |
09-04-2006, 05:53 PM
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CC Member
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Join Date: Feb 2006
Location: Columbus,
OH
Cobra Make, Engine: Shell Valley- 390 FE, 4 speed toploader, 3.50's
Posts: 249
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Not Ranked
Im sorry- I just realized I put this in the wrong spot. before posting, I checked out the tips forum, and forgot to get out of it before posting this.
Greg
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09-04-2006, 05:54 PM
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CC Member
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Join Date: Aug 2004
Location: Orange,
CT
Cobra Make, Engine: KMP 736 Street, Pond 482, FAST XFI EFI
Posts: 339
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Not Ranked
I think full floating pins are clearly better for an engine that is torn down frequently, like a race engine. And it may be better for the do-it-yourselfer.
However, I believe most production engines today use pressed pins, and most modern production engines can go well over 100K miles without a bottom end failure.
I intend to use floating pins because I can do it in my garage.
JMO
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09-08-2006, 11:55 AM
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CC Member
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Join Date: Feb 2006
Location: Columbus,
OH
Cobra Make, Engine: Shell Valley- 390 FE, 4 speed toploader, 3.50's
Posts: 249
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Not Ranked
Thanks for the response. Any other opinions?
Greg
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09-08-2006, 01:21 PM
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CC Member
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Join Date: Nov 2002
Location: Cupertino,
CA
Cobra Make, Engine: Contemporary Classic CCX 3970: 1965 427 Cobra S/C, Shelby aluminum 427 CSX 290 (468 cu in) engine
Posts: 789
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Not Ranked
All I can say is the reason why I have a Shelby engine in my beast is that a wrist pin retainer in my original 390 FE came loose, allowing the pin to visit the block and...  Anyone got a use for a slightly used 390 FE block? Rich |
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