Sorry to bring up the whole timing debate again.... Iv been gone from the forums for a while and haven't had a chance to pipe in. One thing you guys have to remember is that I am running a high compression setup.... Higher compression = me hitting peak combustion in a shorter amount of time. I need less time before TDC to reach peak combustion. I rolled into the dyno session with a 3.8" pulley, 230whp, and 19* of timing. Left with 15* of timing, a 3.6" pulley, and 260 ish whp. On a low compression setup I have NO DOUBT WHATSOEVER that more timing would be very beneficial. Now on e85 you do get more headroom to add timing if you arent already at your maximum useful timing. So if you are still rocking stock timing by all means take advantage of the additional octaine and crank the timing up.