I heard of flex fuel but I thought with that tune it's one or the other.... either e85 or 91/93. Whipple stage 2 tune is tuned for 93 I believe. This guy is convinced that with his "calculator" I could mix x number of gallons of 91 and x number of gallons of e85 (tested at 60% ethanol) and I could be at 93.It's called flex fuel and there are flex fuel tunes that take this into account. Just splashing in E85 and pretending you have 93 with no tune revision is going to be a bad time.
Thanks for the clarification... yeah I'm not going to be messing with this mixture thingMixing E85 and Pump gas "works" but is technically playing with fire.
You are just relying on the cars widebands to try and correct for the change in Stoich
People also dump paint thinner in their tanks for "octane boost"
So ya, there's that.
I do flex tunes all the time for GM guys.Flex fuel can work but I'm pretty sure many tuners won't tune forced induction setups using flex fuel since it's basically guessing the mixture.
VP Racing Octanium is what was recommended to me. I used to mix that with my 93 to diagnose false knock. They sell at it the major auto parts stores for ~$20/bottle.
I just run full E85 now, though.
We're on Mustang6G so we're talking coyote mustangs lol.I do flex tunes all the time for GM guys.
But Fords don't have the same method of precision control for blending
Well not at least as far as I have dived into.