Stock Bottom & Boost - Reliability List
You also have options like selling your motor buying a high mile 5.3 for super cheap and put in forged pistons, new bearings etc and have something more reliable under boost than just swapping out bolts.
Moral of the story... check the tune in the worst weather you will experience and don't push injectors past 80%.
Teching In
Joined: Apr 2009
Posts: 8
Likes: 0
From: Scottsburg
I have a 04 gto with a t76 sts turbo kit on it. have not got to the dyno or a good track pass on the new turbo but the old setup was 42# injector and a hp 61 turbo. on the dyno it made 522hp and 630 tq and went 11.2 in the 1/4 at 124. the car has been boosted for 4 years now with no prob with the motor i any way..
Launching!
Joined: Mar 2009
Posts: 281
Likes: 0
From: Melbourne, Australia
Planning on running around the 10psi mark with a PD blower, doing the odd drag run and I know my tuner is pretty much spot on. Planning on doing bottom end bearings and rod bolts, plus high volume oil pump
Stock LQ4, Custom Cam, Stock Heads, ARP Head studs and Rod Bolts, Precision 76mm, Through 4L80E:
11.5 LBS = 655 RWHP Pump and Torco Mix
8.5 LBS = 585 RWHP Pump Only
Sees 6800 RPM on the REGULAR
Been together for roughly 6k miles total about 4k of which were at 550 RWHP then the last 2k have been somewhere in the upper 500 range. Motor had approx 60k on it when I installed it and boosted it.
11.5 LBS = 655 RWHP Pump and Torco Mix
8.5 LBS = 585 RWHP Pump Only
Sees 6800 RPM on the REGULAR
Been together for roughly 6k miles total about 4k of which were at 550 RWHP then the last 2k have been somewhere in the upper 500 range. Motor had approx 60k on it when I installed it and boosted it.
I have a 04 gto with a t76 sts turbo kit on it. have not got to the dyno or a good track pass on the new turbo but the old setup was 42# injector and a hp 61 turbo. on the dyno it made 522hp and 630 tq and went 11.2 in the 1/4 at 124. the car has been boosted for 4 years now with no prob with the motor i any way..
IMHO of course.
mods in sig...
Stock LS2 short block has never been out of the car... now 761rwhp 645rwtq on boost only (no N2O) 31,000+ miles.
the car was S/C'd right after I bought it new back in '05, I only put 2000 miles on it waiting for the S/C kit to come in... the very first setup netted 620rwhp 518rwtq back then... It's ALL about the tune...
P.S. this car is set up for standing mile, it gets raced every chance I get...
Stock LS2 short block has never been out of the car... now 761rwhp 645rwtq on boost only (no N2O) 31,000+ miles.
the car was S/C'd right after I bought it new back in '05, I only put 2000 miles on it waiting for the S/C kit to come in... the very first setup netted 620rwhp 518rwtq back then... It's ALL about the tune...
P.S. this car is set up for standing mile, it gets raced every chance I get...
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I was making 660 at 12 psi with lq9 heads a small cam and 76gts turbo. It lasted till i got tired of the power and didnt waqnna just try to break it. IE just keep uppin the boost and timing till it popped. Put about 20k miles on it.
And i definately put it through its paces. Alot. Like always. Every stop sign and light. Every onramp. Everycar that i thought had even the smallest chance of takin off.
Now i just gotta get off my *** and finsih it so that i can go faster.
And i definately put it through its paces. Alot. Like always. Every stop sign and light. Every onramp. Everycar that i thought had even the smallest chance of takin off.
Now i just gotta get off my *** and finsih it so that i can go faster.
I would say it's the opposite..... Generally turbo setups require a good bit more injector than supercharged setups. For instance it is very common to run 42lbs injectors on centrifugal setups but I dont know of any turbo cars that'd be willing to gamble on the 42's unless a small motor or minimal boost.
IMHO of course.
IMHO of course.
While it's true turbos like a lower AFR than the a supercharged setup, the total amount of injector required for the supercharged setup is more because of the drag of the supercharger. For example, a turbo and supercharger setup are both making 500 rwhp so that's 588 crank hp with a 15% drivetrain loss. Tossing in some numbers into rceng's injector sizing calculator the turbo setup needs 51 lb injectors with a 0.65 BSFC. Add another 75 hp for supercharger drag and the supercharged injectors have to support 663 hp so it'll need 53 lb injectors even with a lower BSFC of 0.60. So for the same power level the supercharged setup needs about the same size injector if not a little larger than the turbo setup.
oh well onto the the Forged 370 
Registered User
Joined: Oct 2010
Posts: 4
Likes: 0
From: bonham tx.
just askin anyone know how much boost i can push on a stock bottom end of a lt1 email me at michaeltripp1029@yahoo.com
Teching In
Joined: Apr 2009
Posts: 4
Likes: 0
From: Houston
Big Mileage & Serious Weight 4x4 Suburban 6400lbs 185,000 miles
Added the Maggie @ 80k miles pushing 6lbs
Ran with a bad tune for awhile
8lbs & a 4L80E around 85000 miles
9-10lbs now, daily work truck and tons of 1/4 passes...just ran Pinks All Out @ 185,000 miles on a never opened bottom end!
Added the Maggie @ 80k miles pushing 6lbs
Ran with a bad tune for awhile
8lbs & a 4L80E around 85000 miles
9-10lbs now, daily work truck and tons of 1/4 passes...just ran Pinks All Out @ 185,000 miles on a never opened bottom end!
