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Do I need a Tuner after header install?

This is a discussion on Do I need a Tuner after header install? within the External Engine forums, part of the LSx Technical Help Section category; Installing long tubes on my '01 formula A4. Will I need to have computer reprogrammed? Thanks...

  1. #1

    Do I need a Tuner after header install?

    Installing long tubes on my '01 formula A4. Will I need to have computer reprogrammed? Thanks

  2. #2
    Blown, Stroked, & Sprayed

    Ed Blown Vert's Avatar
    Join Date
    Aug 1999
    Location
    San Diego, Ca
    Posts
    50,746

    Black
    383 Procharged & N20 Vert

    I would get it dyno tuned, you most likely are running lean now.
    Black 1999 Blown Convertible A4
    Forged 383, ATI D-1SC
    NX MAF Kit | 222/226 .585 115
    AS Stage II 6.0L FI Heads
    Moser 9" | 3.70 | Wavetrac | 35 Spline | Vigilante 3600
    548.0 RWHP - 563.8 RWTQ - 10# - D1

    666.0 RWHP - 734.2 RWTQ - 125 Shot - P1

    Black 2009 Escalade Hybrid 4WD
    Black 2008 GMC Yukon Hybrid 4WD (Totaled)

    Black 2013 Chevy Volt (Gone)

  3. #3
    Slow'er'Ass Mr. Luos's Avatar
    Join Date
    Aug 2005
    Location
    Thornton, CO
    Posts
    23,785

    Red Tint Jewelcoat
    2008 Trailblazer SS

    Don't LT's make it go rich?

    But yeah...a good tune would find you more power and prevent any issues with fuel trims.
    2008 Trailblazer SS
    Yank PTB3600, Kooks 1 7/8" LT's, 4" intake, E-fans, Magnaflow, Sonnax kit, tranny cooler, tune.
    Lowered, HID's, tinted.

    1999 Pontiac Trans Am WS.6 #1747 SOLD
    531.1 RWHP 481.3 FT/Pounds all motor.

  4. #4
    Blown, Stroked, & Sprayed

    Ed Blown Vert's Avatar
    Join Date
    Aug 1999
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    San Diego, Ca
    Posts
    50,746

    Black
    383 Procharged & N20 Vert

    I have seen it go both ways

  5. #5
    Slow'er'Ass Mr. Luos's Avatar
    Join Date
    Aug 2005
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    23,785

    Red Tint Jewelcoat
    2008 Trailblazer SS

    Okay.
    Just hear most of the time that they go rich. Mine did.

  6. #6
    member since may 2000 nhraformula's Avatar
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    Dec 2002
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    n/w chicago
    Age
    47
    Posts
    6,933

    black
    2000 nhra edition formula

    i had mine tuned.
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

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