Camper

iTrader: (1)

Looking at the TSP PRC's proprietary casting.

currently running a 232/242;.617/.615; 113lsa , can anyone suggest a CC size on the heads that will give me optimal compression for Nitrous and not have PTV issues?

also, the 255's or 260's ?

im also curious to hear thoughts on the ls7 small bore setup on spray

litle88

iTrader: (20)

Hey Dave the Small bore Ls7 will be better on stroker Ls3 setups IMHO.

If you want a good head cncd for spray I'd call WCCH first then AI second.

Fwiw I have 65cc chambers with 12-1 compression on the cam in my sig.

I say an 11.5 compression will be good for spray there's really no "set" rule for lack of better terms.

But as always you should always measure before install bud cause you can never be too careful.

DietCoke

iTrader: (18)

The ls7 is always going to beat the LS3, the issue is cost, since you have to swap to LS7 components (rockers/intake). The intake port angle is better on the ls7 then the ls3.

Jason 98 TA

iTrader: (4)

litle88,

I believe he's discussing aftermarket casting ls3 cylinder heads and I promise you there are no ported stock casting LS3 heads that compare to the PRC aftermarket casting cylinder heads.

The aftermarket casting heads allow us to provide better p/v from a 13 degree valve angle, better valve locations thanks to a all new casting & relocated spring pockets thanks to the new casting design.

For example the 260cc head flows near 380cfm while still having a smaller than stock GM runner size!

The LS7s are awesome on a ls3, but keep in mind with the ls7 heads & intake the motor will rev & peak like a LS7 engine. It moves your power band up a good bit!

litle88

iTrader: (20)

Sorry but I didn't want to come across trying to say they weren't any good Jason lol. I thought he was referring to a small bore Ls7 head to fit Ls3's.