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Thread: Bosch 42# Injector Data Help Needed

  1. #11
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    This is good to know. I will first address my fuel delivery, head to lower elevation with as much margin as possible, then do the pulley. I really do think I have the margin in the MAF tables for it, but the calc.vet probably won't happen before I leave hence me waiting to pulley down. I will then post up with logs and before/after tunes so my blending can be judged, I really suck at that and want to get better.
    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. #12
    Joe (Moderator) joecar's Avatar
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    So, if you're running out of MAF (due to PCM internal 512 g/s limitation as statesman said), you can scale MAF/VE/IFR down, and shift all the tables that reference flow or mass.

  3. #13
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    Oh yeah, I recall that being mentioned in my 1500 thread. And I lied, I'm going to pulley down after work today now that I know I have more than enough fuel for the job. I've got to wonder about the closed loop KR too, will have to grab a log of that.
    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.

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