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Thread: Drive to Tuner will full tank of E85 tune

  1. #1

    Drive to Tuner will full tank of E85 tune

    I have an LS3 with a Vortech that I'm trying to get tuned on E85. (DSX FF kit and DSX Aux pump) It has already been tuned on 93. Can I modify my current tune so that it knows E85 is in the tank, but not add the additional timing or performance aspects of the tune? Just need to drive it 8 miles to the tuner on E85. No boost of course.

    Is that possible? If anyone is willing to help I can upload my tune from my laptop.

    Thanks,
    2011 Camaro SS LS3
    ESS Tuning Supercharger
    711/638

  2. #2
    Just change you stoich under the general fuel tab to 9.68 in the entire table. If the fueling was correct on 93 that will be close enough to get it to your tuner.

  3. #3
    Senior Tuner Ben Charles's Avatar
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    Pure e85 is closer to 9.8x, but also take into account most pump e85 isn?t full blend.. also did it have any 93 left??

    I would sit it closer to 10.5 on stoich but 9s be fine too.. we are only talking half a percent and fuel trims will take care of fuel in closed loop

  4. #4
    Well that's easy enough... So I planned to run it empty at the pump, fill with the E that I will be using most often (closest to my house), flash the tune, then take it in for a tune.
    Should I also switch my wideband to read lamba? If I cant switch to lamba, what should it read running E to indicate fueling is correct?
    2011 Camaro SS LS3
    ESS Tuning Supercharger
    711/638

  5. #5
    Senior Tuner Ben Charles's Avatar
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    Use gas scale be fine... AS long as stoich is changed to reflect Alcohol

  6. #6
    Thank you guys. I went with Ben's recommendation of 10.5 just to get me to the tuner.
    Version4.0ReadNov3 + DSX Aux pump FP + E85stoich.hpt
    2011 Camaro SS LS3
    ESS Tuning Supercharger
    711/638