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That’ll get you in the ballpark…but testing and calculating the blend is the only accurate way.
The station I use for E85 is very consistent at 85 but I still test it about every 2 weeks to verify. You have to factor in any ethanol in your 93 as well. The apps make it foolproof where guessing is just guessing and these don’t love too much ethanol on a 93 tune.
Thanks Unbroken - I do have the 93 Daily Driver Tune from ZFG or do I need a tune specifically for E85? I understand the stock fuel system is a limitation on full power. But if I can run it safely with my 93 tune from ZFG and get a few extra ponies when the E85 is available that is good information to have. Thank you for sharing your knowledge. I'm learning.