droppedchev

iTrader: (5)

im running a lq4 with stock gaskets and 243s idk what the cr is i think its like 10.5 would it be to much to run boost or should i switch back to the 317s what do u guys think

also im running the cam in my sig 228/228 588 588 could i still run that or would i have to swap that to a ls6 cam

YenkoST

iTrader: (11)

LQ4 is 9.5:1 compression and the 317s are 72 cc heads. 243s are 64.45cc heads so you are roughly in the 10.25:1 compression area. Depending on how much boost you want to run. You should be fine with 8-10 psi with an intercooler on that compression. LS2 TBSS guys are running 6 psi intercooled with 11:1 compression. It also has to do with the amount of timing you run as well.

scooter k

iTrader: (22)

I set mine up to run 10.5cr and run 16psi with no troubles. The higher CR makes it run alot better out of the boost too.

YenkoST

iTrader: (11)

Just curious, are running alky/meth and whats your timing looking like at WOT?

Atomic

iTrader: (42)

droppedchev

iTrader: (5)

deff glad i can run those heads another question is should i swap my cam out its a 228/228 588 588 112lsa

old motorhead

iTrader: (10)

I ran that same setup for quite a while on about 9psi with an occasional 75 shot of n2o. It ran lean a few times and I'm building a forged motor now. I'm going to look into a little more capable fuel system on the new motor.

Your cam isn't the first one that I would choose for boost. You can do better there.

YenkoST

iTrader: (11)

Depends on what FI you are going with...procharger or TVS.....there are better options....turbo....probably would be ok but I would get a custom grind so it will be exactly what you want.

droppedchev

iTrader: (5)

im going with a front mount turbo and its only for now