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Thread: Idle Tips & Tricks

  1. #61
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    So you're saying the pintle may seat differently in that passage? I.E. if the passage is smaller the pintle doesn't seat as deeply and thus must open farther to provide the same airflow as a larger hole in which the pintle would seat more deeply? I guess I assumed they'd take that into account when designing a TB for that particular IAC.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

  2. #62
    Joe (Moderator) joecar's Avatar
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    The passage 'size' is different, and how the pintle 'seats' is different...

    also note that some IAC passages are airflow limited (you have to drill them larger).

  3. #63
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    Hmm, seems like one could nerd out by simply measuring said passage assuming one had a tool to fit said passage (depending on angles and whatnot). ASSuming the entrance to said passage wasn't also flow limited, right?
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

  4. #64
    Joe (Moderator) joecar's Avatar
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    You could, and then you would be close, would need just minor tweaking.

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