I just wonder how much difference there is between the e85 race and flexfuel on e85. if its a solid difference i think a 93 and a e85 tune might be worth it. but if its relative flex fuel seems more convenient.
What I was told was that peak hp may not be much of a change between flex and dedicated e85 but the ramp up of timing is more aggressive when the tuner knows e85 only is being used. I think the convenience of flex fuel outweighs the little bit of gain you will get out of an e85 only tune in most cases. If you were to have an aggressive dyno tune on e85 only maybe but for what tuners are willing to do in an email tune I don't think the difference is that great. If you are close to an e85 station and get the race tune for free then use the e85 tune, why not? But if you are likely to get caught out somewhere without a e85 station around, use the flex tune. From what I have heard our cars can run max timing with anything over e60.
