http://www.fnsweet.com/forums/ Discussion not specific to Roush Mustangs, but 2005+ Mustang mechanics in general. en Wed, 22 May 2013 19:11:17 GMT vBulletin 60 http://www.fnsweet.com/forums/images/misc/rss.png http://www.fnsweet.com/forums/ http://www.fnsweet.com/forums/s-197-mustang-mechanical/61600-octane-ethanol-tuner-adjustment.html Wed, 15 May 2013 21:13:30 GMT I have a 91 octane, 10% ethanol tune. If I use a higher octane with or without ethanol should I adjust my spark and fuel using the SCT adjustments to compensate? If so what would be the compensation?

Here is what I'm thinking:
91 w/o ethanol: Advance spark +1-2 deg, lean 2%
93 w/o etanol: Advance spark +2-3 deg, lean 4%
93 with ethanol: Advance Spark +1-2 deg, lean 2%

If these aren't right what are your recommendations?

I still need to do a few runs datalogging now that my wideband is in and realize that will have some impact on specifics, but looking for generalities here. ]]> S-197 Mustang Mechanical nawagner http://www.fnsweet.com/forums/s-197-mustang-mechanical/61600-octane-ethanol-tuner-adjustment.html http://www.fnsweet.com/forums/s-197-mustang-mechanical/61581-ford-racing-tubular-front-bumper.html Tue, 14 May 2013 06:25:41 GMT Another way to save a little weight on the front of the car... of course just like the Ford Racing electric fan, no numbers are given. It says for racing use only, but when has that ever stopped us for using stuff around here. http://fordracingparts.com/parts/part_details.asp?PartKeyField=23401 Another way to save a little weight on the front of the car... of course just like the Ford Racing electric fan, no numbers are given. It says for racing use only, but when has that ever stopped us for using stuff around here.

http://fordracingparts.com/parts/par...KeyField=23401 ]]> S-197 Mustang Mechanical KyleB http://www.fnsweet.com/forums/s-197-mustang-mechanical/61581-ford-racing-tubular-front-bumper.html