How much psi on stock ls1?
This is a discussion on How much psi on stock ls1? within the Forced Induction forums, part of the LSx Technical Help Section category; Hey guys well I'm ready to start upgrading my car again. I am looking into purchasing a Procharger, and upgrading ...
08-17-2010, 02:17 PM #1
How much psi on stock ls1?
Hey guys well I'm ready to start upgrading my car again. I am looking into purchasing a Procharger, and upgrading the rear end first. But my question is first does the procharger kit come with everything? (fuel injectors, intercooler etc etc) and also do I have to run LT headers with a procharger? I live in California where the emissions are a bitch.....any info would be greatly appreciated!2000 Arctic White trans am, ws6 hood, ws6 air box, slp lid, slp smooth bellows, slp loudmouth exhaust,shift kit, rebuilt trans, LS6 intake, 3.73 gears, Shaner S3 p/p throttle body, and a tune . SFC. C6 ZO6 rims 18" in back 17" in front. Drilled and slotted rotors.
08-17-2010, 05:02 PM #2
No you shouldnt have to run lt's since its all belt driven, granted you will not see as much in power gains, but you also could get a catted Y pipe, and im pretty sure you can get a procharger kit that has everything in it dont hold me to that i havnt reasearched all that much, but 5-8psi is all i would push on a stock ls1
08-17-2010, 05:07 PM #3
- Join Date
- Jan 2010
- East of Cleveland, Ohio
- 99 WS.6 - Modified
Procharger kit - depends on who you order from - some places sell kits with everything, some do not.
L/Ts - as said, since you'll be forcing more air into the motor - if you restrict the exhaust, you'll see less performance gains as opposed to having L/Ts. But you can do it, nonetheless. I'd also look into a tune too.
And upgrading the rear is a very good idea - as you stated.
08-18-2010, 04:33 PM #4
08-20-2010, 05:17 AM #5
08-22-2010, 02:38 PM #6
- Join Date
- Aug 2005
- Lemont, IL
- 2002 Trans Am WS6
If you're pushing the timing and A/F too far you risk internal damage, but 8psi is definitely doable on stock internals. This doesn't mean there won't be some additional wear and tear compared to a stock motor, just that it's not mandatory to upgrade everything at this stage.
Plenty have gone tens of thousands of miles with this setup.Nick
2002 Trans Am WS6 - 520rwhp
D1SC @ 10lbs | FLT Level V - SS3600 - ARH 1 3/4" LTs w/ Catted Y-pipe - Corsa - Koni 4/3's - UMI Adj. LCAs and Brackets - UMI 3 Pt. SFC's - UMI PHB - UMI STB - TTM's (17X9, 17X10.5) - M/T ET Streets
08-22-2010, 02:47 PM #7
8#... and I would recommend a meth kit!
GM EFI Tuner
2002 Trans Am WS6 - 9.41@143mph, #3675, on pump gas and drag radials - sold
08-22-2010, 03:49 PM #8
08-22-2010, 04:01 PM #9
08-22-2010, 04:12 PM #10
I would not consider 3-4K on building the bottom end as a "little" extra money.
08-22-2010, 06:13 PM #11
Rear end- $2500
Suspension parts- $2000 (give or take)
Add all tht up and its about and its about 11-12k which is about 1/10 of what everthing else will cost, IF ITS A STOCK CAR AND HE WANTS TO DO IT RITE. Point is, forced induction is not cheap.
08-22-2010, 06:18 PM #12
I totally understand and agree which is why I stated what I did. Once my car has a Procharger on it, I'll be at around 23-25K total invested.
You forgot the trans
08-23-2010, 05:06 AM #13
You are a fear mongerer.... I have more 60 local cars that are boosted on stock bottom ends. I haven't had one that I tuned tat has come apart early either. There are the guys that folks like you say "aren't doing it rite" but have been making 550-650rwhp on their stock motors for the last 4-5 years now. He's not gonna make anywhere near that much without long tubes and a cam, so he's nowhere near the imminent danger you are talking about. I would forge a bottom end if I planned on running about 625rwhp or more consistently. When guys don't track race, 10 bolts live. I kept my 10 ten bolt with 315 drag radials and full suspension for 3 years at over 700rwhp on a more-than-full weight car. It wasn't even hurt when I finally DID remove it and replace it with something beefier.
08-23-2010, 06:44 AM #14
I was just giving my advice, but its his car and he can do what he wants. I guess im the guy who would be "Better safe than sorry".
08-23-2010, 07:03 AM #15
- Join Date
- Aug 1999
- San Diego, Ca
- 383 Procharged & N20 Vert
I ran 8# with a shot of Nitrous for a long time. Till I got greedy.
I always ran it a bit rich, which I think it lasted so long.Black 1999 Blown Convertible A4
Forged 383, ATI D-1SC
NX MAF Kit | 222/226 .585 115
AS Stage II 6.0L FI Heads
Moser 9" | 3.70 | Wavetrac | 35 Spline | Vigilante 3600
548.0 RWHP - 563.8 RWTQ - 10# - D1
666.0 RWHP - 734.2 RWTQ - 125 Shot - P1
Black 2009 Escalade Hybrid 4WD
Black 2008 GMC Yukon Hybrid 4WD (Totaled)
Black 2013 Chevy Volt (Gone)
08-23-2010, 08:00 AM #16
That wasn't a plug for my tuning though... the VAST majority of forced induction cars that I see have stock bottom ends. They are absolutely not on 'borrowed time'. The cost JUMPS up when you forge the motor.
For rears and drive shafts, you will find that the guys that break them always break them.
08-23-2010, 11:39 AM #17
- Join Date
- Nov 1999
- over here...
D  V D
- 1999 trans am
one other thing i haven't seen mentioned is that it depends on how the motor was treated prior to the boost...
08-23-2010, 06:32 PM #18
I am glad you chimed in Frost as I've been trying to decide whether to just throw a Procharger on mine and call it a day or forge the internals. Everything I've read over on tech says 8# on a stock bottom end "rarely" results in any internal damage.
I have 18K miles on my 2002, so my thought process was that with such low mileage and proper maintenance I have kept on my vehicle, it should be a great foundation for running the 8# of boost with stock internals. Even more so longevity wise because of the low miles the car sees.
However, there have been a couple incidents where piston #8 ringlands go on 8#. This of course be the result of a number of things.
08-23-2010, 07:40 PM #19
Use methanol (from a quality kit like Alkycontrol), avoid ragged edge tuning; you will be good.
08-24-2010, 07:18 AM #20
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