Quote:
Originally Posted by Majestic_Turd
Hi
I am in the process of rebuilding a 82 sc and I am turboing it using 930 intake and fabspeed head exchangers along with a efi swap. I am reaching out to see if you guys can give me some advice on what pistons I should use in standard size and what comp.
thanks
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One option we've used over the years is 97mm, 930 pistons and cylinders on a 3.0 crank. 3.1 liter. Made great numbers in the 935 race engines.
91-92 3.3 turbo Ps&Cs. (full fins)
It requires you modify the rods (23mm small end bushings and extend the center to center length .080" ?) Longer if you're looking for more compression (slight piston machining if you go this rout.) Be careful about looking for too much compression on these little turbo engines.
The benefits are multiple. Longer rod for better rod length to stroke ratio, Ps&Cs are factory replacement Mahle which mean ease of replacement if you need one, cost is reasonable and factory pistons use Goetze rings. My favorite for street applications.
These 3.3 pistons and cylinders are readily available low mileage used for very reasonable prices if you want to go that direction.
We're in the process of reproducing the 3.1 SC Ps&Cs as an upgrade for the normally aspirated 3.0 builds. It was a little known factory option back in the day for customers looking for that little something more. I'll post more about the upgrade option soon.