experts needed: LS3 Safe Boost
Thread Starter
Instructor
Joined: Apr 2009
Posts: 205
Likes: 19
From: Denver Colorado
St. Jude Donor '09
experts needed: LS3 Safe Boost
I am getting a Procharger race valve installed and I was thinking of getting a smaller pulley installed at the same time.
here are my specs:
P1SC with a 4.25 pulley for 6.5 lbs of boost = 620 RWHP 543 lb on
91 octane pump gas only - no meth
I have a upgraded springs and push rods along with a cam and headers.
what is a safe level of boost for an LS3 - I was thinking of going to a 4 inch pulley...
experience please
ryan
here are my specs:
P1SC with a 4.25 pulley for 6.5 lbs of boost = 620 RWHP 543 lb on
91 octane pump gas only - no meth
I have a upgraded springs and push rods along with a cam and headers.
what is a safe level of boost for an LS3 - I was thinking of going to a 4 inch pulley...
experience please
ryan
Last edited by birk1; Dec 22, 2009 at 05:52 PM.
Pro
Joined: Apr 2008
Posts: 717
Likes: 1
From: DFW 942whp/938tq
Wow.. Those are really good #'s for the P1 and 6.5psi.. I wouldn't turn up the boost unless your running meth.. I run a D1 @ 12-13psi w/ meth and make 710/636.. My afr is 11.2 I feel this is safe and am very happy with the results, but if I were you, I wouldn't push it any more without meth.
Thread Starter
Instructor
Joined: Apr 2009
Posts: 205
Likes: 19
From: Denver Colorado
St. Jude Donor '09
Life Time NCM #2196
Joined: Sep 2004
Posts: 82,599
Likes: 1,717
From: Converse TX
Thread Starter
Instructor
Joined: Apr 2009
Posts: 205
Likes: 19
From: Denver Colorado
St. Jude Donor '09
no meth...I do have a kit in the garage...just never put it on as I want to keep the car simple.
so just 91 pump gas
I figured I could had a couple of pounds of boost and be safe, but it sounds like that might not work without pulling timing etc... to keep it safe.
so just 91 pump gas
I figured I could had a couple of pounds of boost and be safe, but it sounds like that might not work without pulling timing etc... to keep it safe.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Former Vendor
Joined: Jun 2006
Posts: 1,622
Likes: 3
From: Dallas TX
Le Mans Master
Joined: Dec 2005
Posts: 7,002
Likes: 1,687
From: Southeast TX
I'm at 672rwhp on my LS3. 8.5psi with TVS2300. I do plan on adding a boost cooler soon. Meth or maybe WW fluid. I'm not going to tune it to depend on the meth though. The power it's making now is good enough for me. I guess I have about 4K miles on this setup. So far so good.
Drifting
Joined: Apr 2008
Posts: 1,840
Likes: 3
From: halton region Ontario
If ya have a meth kit ...... use it....easy.....along with the 4" pulley....and a fresh tune.
I know ya want more power....or will....inevitable.
my $0.02
merry xmas
Pro
Joined: Feb 2003
Posts: 745
Likes: 136
From: Detroit MI
My '09 made right on 600rw at 5.5psi with the turbos. I honestly don't see how adding more power makes the car any faster since it's constantly riding the traction control in the first three gears. 600rw is a LOT of power, be happy with it, enjoy it, and don't get greedy.
Pro
Joined: Apr 2008
Posts: 717
Likes: 1
From: DFW 942whp/938tq
I'm at 672rwhp on my LS3. 8.5psi with TVS2300. I do plan on adding a boost cooler soon. Meth or maybe WW fluid. I'm not going to tune it to depend on the meth though. The power it's making now is good enough for me. I guess I have about 4K miles on this setup. So far so good.
Those are crazy #'s considering a ZR1 with CAI, Headers, and race fuel and pullied to 17psi only makes 700/700 with essentially the same blower.. Are you running meth?
Le Mans Master
Joined: Dec 2005
Posts: 7,002
Likes: 1,687
From: Southeast TX
No meth yet. I run 93 octane and stock heads. Compared to a ZR1, I have a much bigger cam, much better exhaust (long tube headers, no cats, straight thru muffs), higher compression ratio, a better intake, and a more aggressive tune.
Last edited by old motorhead; Dec 23, 2009 at 05:34 PM.
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
Alex Trebec - "The answer is, a safe level of boost for an LS3".
Ding - "What is KABOOM -1 Alex?"
Jez, I don't want to be the Grinch who stole Christmas here but am I the only one who's going to call BS? 620 RW with 6.5 PSI, 91 octane, no meth? With a P1 no less?
Either the boost gauge is lying or the dyno is. I'm a little short on cubes but I have a similar setup and I need to push ~11.5 PSI to get my numers.
Ding - "What is KABOOM -1 Alex?"
Jez, I don't want to be the Grinch who stole Christmas here but am I the only one who's going to call BS? 620 RW with 6.5 PSI, 91 octane, no meth? With a P1 no less?
Either the boost gauge is lying or the dyno is. I'm a little short on cubes but I have a similar setup and I need to push ~11.5 PSI to get my numers.
Team Owner
Joined: Mar 2005
Posts: 20,933
Likes: 905
From: salem OR
Team Owner
Joined: Mar 2005
Posts: 20,933
Likes: 905
From: salem OR
Alex Trebec - "The answer is, a safe level of boost for an LS3".
Ding - "What is KABOOM -1 Alex?"
Jez, I don't want to be the Grinch who stole Christmas here but am I the only one who's going to call BS? 620 RW with 6.5 PSI, 91 octane, no meth? With a P1 no less? Either the boost gauge is lying or the dyno is. I'm a little short on cubes but I have a similar setup and I need to push ~11.5 PSI to get my numers.
Ding - "What is KABOOM -1 Alex?"
Jez, I don't want to be the Grinch who stole Christmas here but am I the only one who's going to call BS? 620 RW with 6.5 PSI, 91 octane, no meth? With a P1 no less?
Either the boost gauge is lying or the dyno is. I'm a little short on cubes but I have a similar setup and I need to push ~11.5 PSI to get my numers.
You broke the ice, I was thinking yeah right too!
Le Mans Master
Joined: Dec 2005
Posts: 7,002
Likes: 1,687
From: Southeast TX
EPP made 671rhwp on just 8.4psi. Mustang dyno. It was done on an LS3 powered Camaro. Procharger D-1sc, cam, and bolt ons. The LS3 headed motors are very boost freindly. Don't guys pick up 40 to 50 rwhp when going from LS2 to LS3 heads on a cam only LS2? If you make them breathe easy (upgrade intake, heads, cam, and exhaust), you don't need a huge amount of boost for 600+ rwhp.