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Do I need a tune? Headers

This is a discussion on Do I need a tune? Headers within the External Engine forums, part of the LSx Technical Help Section category; I am looking to buy a set of headers probably shorties due to emissions. Is it recommend to get a ...

  1. #1
    Go Vols! x10-wakerider's Avatar
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    Do I need a tune? Headers

    I am looking to buy a set of headers probably shorties due to emissions. Is it recommend to get a dyno tune like it is with long tubes since it can throw off the air/fuel, or will it act like the stock manifolds. And finally what kind of HP & sound will I get from shorties?

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    Member keliente's Avatar
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    99 Firebird Formula

    What year car do you have? a 98-99 car will benefit from shorties more than other. But if you want a real gain you should go with long tubes.

    A tune is a good idea so that you will maximize your gains...for instance when I added headers I put down 335hp & 342tq on the dyno...after tuning, 351 hp & 355 tq...that's a big difference!

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    We'll be back... GatorSS's Avatar
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    If you're going to install headers, I'd go with long tubes since shorties will not show much gain over the stock exhaust manifolds. After some disappointment, you'd be saying, "Why didn't I go ahead and install long tubes while I was at it..."

    And yes, definitely get a tune after any header install.

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    pewter
    1999 pontiac formula

    I am running pacesetters with no tune and I am showing
    zero et gains over stock at the strip so I say a tune is a must have item.
    John

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    Story of My Life!! BIG D's SS's Avatar
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    Quote Originally Posted by john99
    I am running pacesetters with no tune and I am showing
    zero et gains over stock at the strip so I say a tune is a must have item.
    John
    When I put on my headers with no tune I slowed down et, but picked up mph. Do you have o2 sims on it. I also had someone tell me that it retards timing if you don't. I didn't have them and it hurt me. Since I put my cam, gears, headers, and a dyno tune it is much better.
    3 inch Chambered Catback.

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    pewter
    1999 pontiac formula

    I do not have sims. I will have rear 02s deleted with tune.

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