buick_lsx

Been running 9 lbs on the stock motor with 10-1 compression...the new forged motor will be 9.2-1 compression...

How much more boost should that allow me to run on pump gas?

kmracer

iTrader: (1)

intercooler? 91 or 93? what turbo/supercharger?

buick_lsx

93 octane, a/w intercooler, 75mm turbo

kmracer

iTrader: (1)

playing it safe? 12-13. i woudlnt play with timing either.

if you wanna roll the dice you can probably do a couple lbs more. are you planning on hitting the dyno again?

buick_lsx

Yea, it'll be tuned on the dyno then track. Just trying to get an idea...13lbs would get me 700hp on pump and I'd be happy with that

buick_lsx

And yea, the timing won't change on pump gas. 609 to the wheels right now with just 15 degrees

kmracer

iTrader: (1)

good luck! 15* should be very safe, even at 13.

buick_lsx

I'm sure race gas will see more timing. Might add meth for even more boost on pump but that would prob just get me in trouble lol

kmracer

iTrader: (1)

exactly. i personally would rather tune on the dyno, get the torque/timing combo (mbt) along with a comforable boost level, and turn it down for pump. i wasnt sure if you were planning on running race gas or not.

are you tuning yourself?

buick_lsx

It'll be tuned on pump, that'll be close to 700rwhp and then race gas will max the turbo out

buick_lsx

Race gas might be for just 1 or 2 races a year plus dyno days lol

kmracer

iTrader: (1)

cool cool. have fun mang.

ChevyChad

iTrader: (50)

what heads and intake manifold? 15psi on stock restrictive heads is a LOT different than 15psi on nice flowing aftermarket heads. What size engine? Takes a lot more air to feed a 427 than a 347. This is why you need to look at total power rather than total boost.

buick_lsx

This is on a 364-370 motor with stock 317's...when it gets forged the heads will be ported though. And edelbrock pro flo intake.

yessir

iTrader: (5)

my stock lq9 see's 14 psi on pump with no meth, id imagine u could run more thah that on your setup

robbyredneck

iTrader: (1)

what timing?

kmracer

iTrader: (1)

great point, i should have asked, although 12-13 is a very safe number for almost anything with a 75mm turbo and an A2W.

yessir

iTrader: (5)

not exacly sure, 13 or 14 i belive, lol was so happy with peak numbers i forgot to ask the tuner

buick_lsx

So what did it make with 13-14 lbs? And why dyno