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Yea he is about right. E85 will take a lot tighter than pump gas as well. Most of the time a 80-100k mile engine will be about right for E85 but on gas it could still be a little tight for really high boost.
Thats what i figured. Gonna be a lot of horsepower i need those rings to not bind up at all. Did you just open the gap up and shave it down with a file?