Originally Posted by SLIM NOTHING

12:! is being done on boosted cars lol but on those sleeves i woudlnt attempt. i beleive that the effect that boosting has on sleeves is safer then building an all motor high cr and running them sleeves.

at this point yes you can port your head, and no you wont see too much of a differance, save your money. a good valve job, maybe performance valve job is good for you. no need to mill your head. do a 10:1 cr, a skunk2 tuner cam or just type R if you want to save money. dont jump on all these band wagons of having to use certain parts. from my experiance and the experiance of others i have talked to and friends with, it way easier than people put into it. if you are worried about your block send it to benson they are good sleeves fro what you need and will be very reliable and wont break your wallet, im saying benson because they are not as pricey as others. GL

Originally Posted by DirtyDA9

Depends what compression ratio CP pistons you buy, they aren't all the same.

Originally Posted by Turbo-LS

Your correct, higher compression all motor engines put more stress on the cylinder walls than lower compression and turbo. Its a more linear rise in pressure and force on the thrust postions of the wall with turbo than with all motor. Yes you can do 12:1 with boost but not on pump gas unless its e85 and on the b20 block i wouldnt trust it