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Longtube-Retune?

This is a discussion on Longtube-Retune? within the Performance forums, part of the General Discussion category; After I install my longtubes will I need to have my PCM tuned for them, or will it be fine ...

  1. 01-04-2008, 12:52 PM #1
    ShortWideVortec
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    Longtube-Retune?


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    After I install my longtubes will I need to have my PCM tuned for them, or will it be fine for a while?
    1997 RCSB 5.7
    - 17" Boyd Coddington Blasters
    -2/4 Belltech
    -Pacesetter Longtubes
    -LS1 E-fans
    -K&N Intake
    -Wheatley tune
    -14 bolt SF Posi
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  2. 01-04-2008, 01:22 PM #2
    91chevZ71
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    Re: Longtube-Retune?

    fine for a while, I would think. couldn't hurt to retune, it's only gonna run better
    91 K1500 ECSB
    LQ4/80E/241/60/14SF/4.88/38
    98 2Dr Tahoe
    L31/0411
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  3. 01-04-2008, 04:57 PM #3
    TITANIUM
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    Re: Longtube-Retune?

    You may get the evil RPM fluctuation off idle. If it does, get a retune and it will fix it.
    1991 C1500 Ext. Scrapped. I still have the engine, tranny and Detroit tru-trac.
    2005 GTO LS2 with full Pedders track II suspension. StreetsweeperHT cam with Kooks exhaust. Tuned.
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  4. 01-04-2008, 10:22 PM #4
    Pauly
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    Re: Longtube-Retune?

    It will run fine, but for max gains PCM tuning will be needed.

    peace
    PAuly
    97 GMC 2wd RCSB 5.7, s10 2700 footstall, Hooker 24621hkr LT's , 2.5" cats dual 4"pipes exit B4 pass. side tire, custom driveshaft 3.42 G80 FIPK MAF descreen GM/Mercruiser Marine intake manifold 29lb LS2(EV6) injectors Ed Wright PCM(best mod), LT4 KM 14.8@94mph 2.007 4000lbs 122mph
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