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Tune? E85 to 93 or vise versa

Discussion in 'FAST Support Forum' started by Turbopowered68, Sep 18, 2017.

  1. Turbopowered68

    Turbopowered68 New Member

    Joined:
    Mar 28, 2017
    If i am on my E85 tune could i just change the fuel Cal value and fill up with 93 keeping the same tune?
    BTW when i am on 93 it's for cruising and long distance travel NO getting on it at all.
     
  2. Fastmanefi

    Fastmanefi Active Member

    Joined:
    Jun 4, 2011
    Location:
    Sonora, CA
    Assuming the spark timing is safe it should work, but I'd pay attention to the O2 correction % after the change.
     
  3. 9secondz28

    9secondz28 Member

    Joined:
    Jul 4, 2012
    Location:
    psl/florida
    I’m kind of the same but I have a very rough 93 time with 10lbs boost only for street driving and I want to start to do e85 before the dyno
     

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