Thread: Piston question (off set pin)
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09-07-2009 01:33 PM #1
CHR Member
- Join Date
- Aug 2009
- Location
- Richmond
- Car Year, Make, Model: 1984 Inboard Ski boat
- Posts
- 37
Piston question (off set pin)
Does a stock Small Block Chevy generally run an offset piston pin.
My engine is a 1989 350 (Late Gen-1 TBI) from a 2wd Suburban.
I've swapped the engine to counter rotation for my boat.
~ Simple Cam swap / crank seal swap. Cam and crank are gear to gear with no idler gear ~ Crank spins backwards / Cam spins forwards.
Now I am getting conflicting information (from the boat guys) that I need to flip the pistons as some folks believe that the Small Block Chevy has an off set wrist pin as standard design, Thus the part making the pistons directional.
Question 1. Are the piston pins off set?
Question 2. Will I need to flip the pistons to run the engine backwards?
Question 3. Any concern for the rods (oiling cyls) spinning the opposite direction.
[img] width=700 height=523]http://i9.photobucket.com/albums/a53/whitfimb/Dixie%20Super%20Skier%20299/P9060908.jpg[/img]Last edited by Whitfield; 09-07-2009 at 02:44 PM.
UNDERSTEER is when you hit the wall with the front of the car. OVERSTEER is when you hit the wall with the rear. HORSEPOWER is how fast you hit the wall. TORQUE is how far you take the wall with you.
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I saw last night on fb about John. The world sure lost a great one. I'm going to miss his humor, advice, and perspective from another portion of the world. Rest in Peace Johnboy.
John Norton aka johnboy