very good info thanks man!

 

two maps should not be double the price is what we are all trying to tell you. The chance of running an E85 tune on E70 and over richening your tune is not a good idea. Why risk a 5K + motor for what is probably 150 dollars. It just doesn't make any sense.

 

I've noticed minimal changes in overall power delivery running both E85 & E70. The amount of boost/timing is pretty comparable that you can run on both mixtures. The benefit of getting tuned on E85 rather than E70 is that your tune will be richer once E70 is around due to less ethanol content. The difference between running the two is not that noticeable though.

 

Great info. That's what I wanted to hear.

 

Oops haha

 

So if you get tuned on E-70 then you have the chance to run lean once the gas switches to E-85?

 

That's what I understand.

 

Yes, it will lean you out. It won't be drastic, but will be noticeable if you log wideband afr. Say you're tuned to 11.7afr on E70, once the mixture changes to E85 you might be around 12.1. Not sure it's really worth getting re-tuned, unless you do your own tuning to touch up the fuel map. I've run E70/E85 between 11.5 and 12.5 afrs and haven't noticed much change in overall power, knock, boost threshold etc. I say get tuned on E70 and have your tuner keep it a little rich (~11.0-11.5 wot) and then when it changes to E85 you'll still be in the sweet spot in terms of afr.

 

I'm gonna test what's coming out of te pumps here right now and hopefully it's somewhere in the middle. As long as that happens my cars being tuned on it.

 

http://www.quickfueltechnology.com/s...test-tube.html

 

thanks for posting that here! thats what im using since you posted it on hb.

 

Order some E-98 offline, or some E-85 if it is available. I know you can order E-98 though, for sure. Do some math on how much 93 octane you would need to add to dilute it down to E-85 and voila, you have E-85. Either the math or use the tool above to determine the consistency.

 

definately one way to do it