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Thread: E85 AFR's

  1. #1

    Default E85 AFR's

    Hi,
    I have searched the forum and googled with no luck for E85 numbers.
    Is there a EFI Live E85 conversion how to I missed.

    2004 HSV Clubsport LS1 12225074......................STD.........E85
    {B3601} Ratio of Air to Fuel for Stoichiometry......14.63.......9.760
    {B3606} Maximum Enrichment...........................12.947.....7. 515
    {B3607} Open Loop Lean Limit (Idle)..................14.629.....9.700

    Are my E85 numbers in the ball park or what do I change or leave.
    This is a LS1 turbo straight E85.

    Apples

  2. #2
    Joe (Moderator) joecar's Avatar
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    If you use EQR units then stoich is 1.0000, idle is 1.000, NA PE is 1.175, boost PE is 1.25... regardless of fuel being run.

    ~ posted by phone ~

  3. #3
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    Sorry for the dumb question. But I'm in the middle of switching to an E85 only tune. If I change over to EQR on 93 oct then all my PE settings get converted as you say ~ 1.25. Then once I fill the tank with ethanol blend all I need to do is change my B3601 to 10.3 or so for E75 and I'm good to go?
    2001 Camaro SS
    Built 370 LQ9, Ported 243s, D-1SC 14 psi. 691 rwhp, 643 rwtq
    Best time: 11.6@124 on nitto drags with a 2.1 60'
    "if you're gonna build a time machine into a car, why not do it with some style." Dr. Emmett Brown

  4. #4
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    Quote Originally Posted by white01ss View Post
    Sorry for the dumb question. But I'm in the middle of switching to an E85 only tune. If I change over to EQR on 93 oct then all my PE settings get converted as you say ~ 1.25. Then once I fill the tank with ethanol blend all I need to do is change my B3601 to 10.3 or so for E75 and I'm good to go?

    Yes.

    Change to your current stoich. You should go to a P59 ECM and add a sensor to avoid the changing of calibrations.
    "All that is needed for the triumph of evil is that good men do nothing..."

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