[Shane@DBPerformance]

I usually have to run .022"-.025" on bigger turbo E85 cars. I have been able to get away with bigger gaps on high boost smaller turbo E85 cars. I really haven't seen bigger gaps help full boost power, a smaller gap will definitely effect your idle and part throttle though for the worse. I have had a bunch of E85 cars that weren't noticeably misfiring but weren't making the power they should, gain good power from new plugs, tighter gap, swapping coils, ignition boxes, etc.