lexar13

i am looking to buy a built zo6 block with standard ls1 stage three port done. their are forged dimand piston in the block but the owner has no idea what the compression is. i am assuming the shop where he paid for the build just ordered standard compresion pistions. so with the heads what compression whould that be? thank you in advance.

slow trap

iTrader: (22)

it will depend on if your heads have been shaved any. also the diamonds will have either an -2 or -4 cc valve reliefs in them probably so compression will be lower than stock if heads are not milled down any.