No way ever would I use higher than 9.0:1 compression rotors as found in the S5 onwards turbo engines. Do not recommend it for any fuel types in human existence. You will always need to run non ideal fuel mixtures and spark timing and all of these factors point towards the static compression being WAY TOO HIGH. :biggthumpup:

There are other ways to fight off detonation rather than using E85. My big concern with E85 is that you don't always get E85. So you tune for E85, then get a tank of E70 thinking it's E85 (making up numbers here, I don't know what the actual variances are) and then what happens? I would rather go with something that can be had consistantly. Or get one of those sensors that senses the amount of ethanol and trims fuel and spark to suit it. That would be trick, but a pain in the ass to tune, although once you did get it, you would truly have a flex fuel vehicle.... funny how the OEM's did it that way :D

Or just drop in some turbo rotors.

I'm thinking about putting in a set of the the S4 n/a rotors into the 'vert. But this will be a low boost, stock turbo engine. A little more compression to liven it up down low... but we'll see.

This is a true story, but again, horses for courses as you put it. If you're running minimal boost on a stock port, stock turbo engine, it can liven it up a bit in the vac/cruise ranges.

E85 is a total certified nightmare > read here > http://www.ausrotary.com/viewtopic.p...de809551254e98

I convert one car a week back from that bullshit to gasoline and water injection. I am not the only person either, across the country MANY people are doing the same, there are so many horror stories running this hyped up shit its unreal............. most are too ashamed to admit how many engines that they have destroyed as a result of running E85 crap!

You need to see what it does to your rotor bearings after it contaminates the sump oil, again something no one will tell you about, but is a well known fact in the "industry" For road cars E85 is a total con job, its really a race fuel and a very poor one at that given how often it fucks engines.

I was waring people from the outset of this bullshit being promoted as gods gift, and its turned out to be the BDC of fuels.

:smilielol5: @ BDC of fuels

That's something else that I totally forgot about.... what it does to the oil. Obviously not as much of a concern with piston engines but still something to be aware of.

It amazes me that you don't really hear too much about the failures of it, just about how great it is before it's even used. I suppose it could have it's place though.