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confused

This is a discussion on confused within the Firebird / WS6 forums, part of the Vehicle Specific category; ok. so i wanted to get bigger hp gain by installing a few mods to my 2002 ws6. i decided ...

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    Junior Member kamahlwolf's Avatar
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    2002 pontiac trans am ws6

    confused

    ok. so i wanted to get bigger hp gain by installing a few mods to my 2002 ws6. i decided to go with the basics and installed pace setter 1 7/8" with a 3" outlet headers, 3" cats, 2.5" custom y-pipe, and slp loudmouth 2 exhaust. also added a volant cold air intake. my problem is that it seems like in doing that i lost quite a bit of back pressure. what can i do to get my full hp out of my mods and where did i go wrong? any help would be appreciated

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    Member damianj03's Avatar
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    slap your mama red
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    get your PCM tuned

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    Agreed. The last part of my install was to ship my PCM to Frost.

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    Veteran Hi-Po's Avatar
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    Back pressure is an old internet myth that needs to die. Get in touch with Frost. He can get that thing nailed with a mail order.
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    Senior Member Lunatikgixxer's Avatar
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    yes im almost positive if u get headers or even a new intake system u need to get it tuned to get some nice results

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    Member dbrichrider33333's Avatar
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    Quote Originally Posted by Hi-Po View Post
    Back pressure is an old internet myth that needs to die. Get in touch with Frost. He can get that thing nailed with a mail order.
    would this be true for cutouts in between longtubes and the y?? ive been thinking about an exhaust setup and am stuck between getting cutouts...or just longtubes and a high flow catted y-pipe...so would the backpressure be an issue with cutouts?

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    Auto Painter RyanJM's Avatar
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    I have 1 3/4" QTP race headers, ory, volant, sevral other bolt ons and the tune still made a great difference escecially if you have an A4, mine runs to 6100rpm in every gear and shifts harded + faster.
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    Junior Member kamahlwolf's Avatar
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    could i do it with a diablo sport power programer or no?

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    Moderator Cutlass's Avatar
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    not really. Frost is the way to go

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    Quote Originally Posted by dbrichrider33333 View Post
    would this be true for cutouts in between longtubes and the y?? ive been thinking about an exhaust setup and am stuck between getting cutouts...or just longtubes and a high flow catted y-pipe...so would the backpressure be an issue with cutouts?

    I asked Frost this very question as I was not yet certain about a cutout when I sent him my PCM. He can clarify, but I am pretty certain his response was that the change would be essentially negligible so there is no need to re-tune for a cutout. The only exception was a car that was "tuned to the bleeding edge".

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    Member dbrichrider33333's Avatar
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    Quote Originally Posted by pajeff02 View Post
    I asked Frost this very question as I was not yet certain about a cutout when I sent him my PCM. He can clarify, but I am pretty certain his response was that the change would be essentially negligible so there is no need to re-tune for a cutout. The only exception was a car that was "tuned to the bleeding edge".
    ok..would cutouts after the longtubes affect performance, or throw a code if they were run open??

    i ask this because where i live u need emissions and i want to go with cutouts before a h/f catted y..and i wouldnt want it to throw any codes to my car because of different readings from the cats being after the cutouts..just a ? im not too sure on..

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    Two thoughts: One, as long as the cutouts are not too close to the O2 senders in the LT's you should be ok. You just do not want the reading contaminated by outside air. Two, if you have the deleted the rear O2's there should not be a problem. If you are still running them, I'm not sure what the effect would be - but an SES light would not surprise me.

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    Exalted Cyclops 67CamaroRSSS's Avatar
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    Quote Originally Posted by Hi-Po View Post
    Back pressure is an old internet myth that needs to die. Get in touch with Frost. He can get that thing nailed with a mail order.
    ^This.

    While it's considerably older than the internet it's a myth nonetheless.

    You ever see a race car with mufflers or cast iron exhaust manifolds that didn't need them for class reasons????

  14. #14
    Junior Member kamahlwolf's Avatar
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    i can deffinatly feel a loss in torque after i put the exhaust on. i am going to get a comp tune and let you know how it works out.

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