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Thread: 96 vortec 7.4 0411 swapped still needs a basic tune that works

  1. #31
    Lifetime Member
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    Mar 2009
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    I'll have to keep this thread in mind. I have a 411 and 42# injectors for my dually. Once I address the remaining driveability issues on my 1500 I'll tackle the 3500. I'd prefer to have a 90% solution on day 1 with that truck.
    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. #32
    Lifetime Member SS2win's Avatar
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    Feb 2005
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    Joecar, there was drivability issues with teh original transmission. forget the details. Not sure if the base tune was modified or what but the segment swap fixed it for me.
    2001 Camaro SS #2020
    Stock LS1 w/InconTT | REV Springs | Ti retainers | M6 | McLeod Twin Clutch
    UMI RR K Member | SLP Subframe Connectors | Global West TA | BMR PHB | Metco LCA
    996 Brake Kit| 17" CCW Classics | 17x11 ZR1 Replicas on all four corners

    425@6lbs | ???@12lbs | EFILive Custom OS3 | !MAF | SD
    11.73@12x/1.7 on worn out nittos... yaaawn!

  3. #33
    Joe (Moderator) joecar's Avatar
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    Apr 2003
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    ah, ok, segment swap fixed it

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