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
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From: Denver Colorado
St. Jude Donor '09
Life Time NCM #2196
Joined: Sep 2004
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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.
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Former Vendor
Joined: Jun 2006
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From: Dallas TX
Le Mans Master
Joined: Dec 2005
Posts: 6,999
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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
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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
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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: 6,999
Likes: 1,684
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
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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: 6,999
Likes: 1,684
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.