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#1
Sun, February 14th, 2010, 12:26 PM
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The problem with running E85 is that the compression ratio in the engine doesn't change so you can't take advantage of the higher octane of E85. Sure, you can advance the timing a bit and that helps improve efficiency of the combustion and provides a little more power, but engines built specifically for E85 would notice a significant power increase from higher compression. The same goes for oxygenated fuels.
__________________
Bill Cohron - The Mad Doctor   Power Hungry Performance - The ORIGINAL in Ford performance tuning... Since 1997! (678) 890-1110 www.gopowerhungry.com - Home of the Hydra Chip, Minotaur Tuning Software, and the new Orion Reflash System for Navistar! Bring back  Windows™ XP and 7.  Windows™ Vista and Windows™ 8 is a pain in my a$$!  Windows™ 10 is only slightly less annoying!  Windows™ 11 is garbage!  Much to my surprise, I'm actually quite enjoying Linux! 
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#2
Fri, February 19th, 2010, 07:51 AM
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Awesome, thanks for the replies. I'll go ahead and stick with the 91 tune. I just got my tax return money this morning so I'll probably be putting in my order this morning!!!
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#3
Fri, February 19th, 2010, 06:12 PM
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I was wondering the same thing. I have an 07 Flex 5.4 with CAI and Cat back not true duel. I just got my grypon yesterday and Bill said to use the 87 Tow until my custom 87 Perf and 92 perf tunes get built. WoW I got that tune all tweaked out just the way I like it. I run 90-92 ans just advances the spark 1 degree. So here is my question what tune do I use if I run e-85? The Custom 87 perf or the 92 or canned tranny only?
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