02NBMFormula

iTrader: (6)

I plan to put a d1sc on this summer and run it around 8psi, its through a stall auto so im guessing around 420-440 rwhp. i was wondering if switching to lq9 heads, to get lower compression, to going to a little higher boost would be safe. id like to get around 480-500 rwhp but im not too sure how safe it would be. (550rwhp is around the stock blocks limit, correct?) i understand that would need a really good tune. this is a daily driver with 50k miles. also what boost would be safe with that head combo? would it be as safe as 8psi on stock heads?
thanks in advance.

98turbls1

iTrader: (17)

8psi is perfectly fine...Just make sure that there is no Knock Retard if you're tuning and that your AFR is somewhere around mid 11.x @WOT ...

fenix999

iTrader: (17)

what he said, those heads should make the motor run real nice and safe while still giving you nice power all around. Just whatever you do be prepared for worse case scenario and save up about $600 for pistons just in case you fry one or more of the rings and you have to rebuild. Just my .02 good luck with it though it should hold for a very long time the way ur thinking about doin things

52172

iTrader: (2)

you can run more boost with the lower compression and still have the same cylinder pressures. So the answer to your question is yes.

EPP

iTrader: (22)

Patriot LQ9 stage 2 heads work great on these engines, and are affordable.
We use them on many of our builds, such as in this Corvette. http://www.exoticperformanceplus.com...Car.php?car=40 Bob

lmt0705

iTrader: (7)

you have to be careful with the stock pistons, trust me I know from experience. I was making just under 500 rwhp and I busted 2 pistons in my stock motor

rufretic

iTrader: (37)

Who tuned it?

I'm planing on making around 600rwhp with a good tune. I'm pushing my luck but with 500rwhp and a good tune, the stock block should last. I am also using lq4 heads for extra safty. I don't think you want to add more boost though. The way I understand it, you can make the same power with less boost. Ex. stock heads+8psi=495rwhp and lq4 heads+6psi=495rwhp. At least thats the way I understand it, it's safer because you can run less boost but still make good power.

barnat

iTrader: (59)

just buy my block and turn the boost up babyha ha. its aforged 364 ls2 still at mach shop in bag 9 to 1 rated to 1000 hp 5200 inv. will let go for 3850 with new ati supper damp and tci auto fly wheel barnat 724 869 9643 this is a short block.

BIG BAD BLACKSS

iTrader: (4)

Thats a heck of a deal!