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best piston pin size?

Posted By: Keith BlackĀ®

best piston pin size? - 01/26/13 06:28 AM

Hi Guys, I am about to order rods/pistons & I am looking for some help on the best piston pin option.

Engine (Hemi), 7.100 (steel-Oliver) rods, 2.20 journal crank (crower) 4.500 stroke, 8.5:1 comp. supercharged < 20lbs. est hp <1500.

Options are .990 or 1.03 or? what is generally used or am I safe either way?

PS: Who is presently the best custom piston manufacturer? CP/JE?

cheers, thx for your help.
Posted By: Performance Only

Re: best piston pin size? - 01/26/13 04:43 PM

A good tool steel .990 pin is plenty for what your doing. both of the piston companies you mentioned can make what you need.
I use and sell Diamond Pistons for almost all of our custom pistons, especially the higher horsepower applications.
Posted By: dogdays

Re: best piston pin size? - 01/26/13 05:15 PM

Amen. The 2.20 rod journal and the 0.990 pin have become the de facto standard for big blocks. Deviate from that at your own risk. You'll have a much harder time finding pistons, pins, etc if you go stock Mopar on either end.

R.
Posted By: Cab_Burge

Re: best piston pin size? - 01/26/13 07:38 PM

As already said a tool steel pin and around .170 wall thickness
Posted By: Keith BlackĀ®

Re: best piston pin size? - 01/26/13 10:53 PM

thanks everyone . I'll go with .990.

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