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Thread: Intake manifold with different runner lengths

  1. #1
    Advanced Tuner
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    Oct 2004
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    Intake manifold with different runner lengths

    Will it be a problem to tune this manifold with OEM Gen3 PCMs?

    https://www.motortrend.com/reviews/p...ld-first-look/

    Email from their sales team:
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    At this time we are not offering different runner length options for the XS. The different runner lengths that are in there now are the front/rear for clearance and the center ones are mixed to maximize torque/power balance.
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    1998 NBM Camaro Z28
    LS3 motor
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  2. #2
    Tuning Addict 5FDP's Avatar
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    May 2012
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    I don't see a problem.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  3. #3
    Tuning Addict blindsquirrel's Avatar
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    Apr 2017
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    If that kind of thing bothers you then you should not be using a factory ECM, you should be using an aftermarket (and a high-end one at that) ECU that allows individual cylinder tuning. And once you're at the point of spending the kind of money for a carbon fiber intake what's the point of hobbling your eleven-tenths combo with all the other limitations of a factory ECM?

  4. #4
    Senior Tuner
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    Nov 2006
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    If you guys ever get to go on a engine dyno with 8 widebands running at the same time you would flip out at the wide range of AFR's that come out. Some cylinders might be low 12's others might be high 13's..

    And the next run it will be completely different.
    Tuner at PCMofnc.com
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