wooly

Hey guys im struggling abit with figuring out what cc pistons I need.

Im building a ly6 408 so 4.030 x 4.00 with a ls9 head gasket and same l92 stock heads.. im aiming for 9.5.1to suit my needs. Can anyone help with what piston dish size??

Cheers

lil john

You need the CC of the heads, crank/rod combo,deck ht, and gasket thickness. Call any piston guys JE,ROSS,WISECO ..etc

wooly

Thanks mate. Ive emailed a few but no luck really so thought id ask on hear hoping someone could work it out for me.

Ill leave these hear just incase anyone could get me a figure.
Cheers.

Crank 4"
Bore 4.030
Rod 6.125
69cc heads
Gasket .055" compressed 4.100 bore
Ly6 block

KCS

iTrader: (20)

Google "compression ratio calculator".