SLP Headers and LM Dyno question, Please Help

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Dec 11, 2002 | 09:09 PM

Nautilus

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From: VT/SC

SLP Headers and LM Dyno question, Please Help

I have an '01 WS-6 (M6) with the following mods: SLP lid, SLP smooth bellows, SLP 85mm MAF, SLP 160 T-stat, manual fan switches, and loudmouth exhaust. I have ordered the SLP LT headers w/ Y-pipe and high flow cats. I have three questions, first what kind of Power gains should I see and is there anyone with a similar setup that has had it on the dyno? Second, my car has not been tuned at all, the computer remains stock, is there anything I should have done to maximize my gains? And third, I love the way my LM sounds but does anybody have a loudmouth with headers and how much louder is it? Also any other comments that would be helpful......
Thanks,
Tim

Dec 12, 2002 | 06:50 AM

TA_2001

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From: Dallas,Texas

Re: SLP Headers and LM Dyno question, Please Help

hotcam+lid+catback I had 330/330
added the SLP lt kit ( headers,cats,y-pipe)
351/364

the sound is great!.. ( mac catback ).

slp headers are very high quality and fit great.

here is how I installed them at home.
http://www.ls1info.com/article.php?sid=149

Dec 12, 2002 | 08:17 AM

niphilli

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From: Raleigh, NC

Re: SLP Headers and LM Dyno question, Please Help

On an '01 car you can expect about 10-15 HP from the LTs. The Manifolds are actually pretty good for an internally stock car. You will most definately want to get a MAFT because in all likelyhood you will go rich after header install. You may even want to look into Predator or LS-1 edit so that you can look at your timing (It looks like GM pulled some timing out of the '01-'02s to slow them down a lil). My guess on Power would be 335-345 without a tune, 345-355 with a tune. It seems like the '01s and '02s have more variations in power than the pre-'01 cars. Hope this helps.

-Nick