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Thread: fuel mileage

  1. #1
    Junior Member
    Join Date
    Jan 2014
    Posts
    14

    Default fuel mileage

    any help on tuning for fuel mileage on the gas ls gen IV 4.8,5.3 & 6.0 would be helpful? Thanks

  2. #2
    Lifetime Member
    Join Date
    Jan 2012
    Posts
    213

    Default

    general tuning helps alot. Lean out the cruise tables. add timing where needed. Im tunning about 15.6 afr and 38* timing at cruise speeds (70mph). Currently getting 16mpg out af a gen III 5.3L with a 80e, 4.56 gears and 33" tires

    Old setup
    2001 GMC Sierra C3, 6.0L, AWD, pacesetter LT, ORY, dmax 4" exhaust and 14" magnaflow, 05 e-fans, NNBS intake manifold, K&N intake, Comp Ls-R 227/235 .614/.621 113LSA, WCCH P&P heads. Procharged with a D1-sc.
    2001 GMC Sierra CK1500 C3: 12.020 @ 111.580 MPH
    New Setup: 5.3L, 80E with HD2 shift kit, stock converter, NNBS intake mani, Pacesetter LT, ORY and 4" exhaust.

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