05 STi, ST, Leaded fuel, missfire - Page 2

TurboQueef · 05-09-2007, 01:01 AM

Quote:

Originally Posted by crystal_Imprezav

J, I personally have never gotten the results I have experienced with leaded fuel vs. unleaded fuel. The numbers and tune I got out of 110 leaded far exceeded those of 110 unleaded. My guess is that, after doing a few runs and tunes on the unleaded gas, you will be heading back to the station for the oh so good lead

Could be ... have you ever tuned with the oxygenated lead free fuel though? I hope that gives an advantage over the leaded... time will tell.

crystal_Imprezav · 05-09-2007, 03:51 AM

Ahh, I didn't catch that it was oxygenated. Good luck with it, report back your findings or shoot me a PM to compare logs.

WolfPlayer · 05-09-2007, 04:45 AM

Lead acts as a Detonation Antagonist. It seriously helps to prevent it. Being oxygenated just means that it can add more power when combusted (due to more O2). Thus, if you have detonation problems on leaded fuel, then unleaded race fuel will usually hurt the problem. If you don't have detonation problems, then the extra O2 will be a nice tiny power adder

t

05-09-2007, 03:51 AM	#17
crystal_Imprezav Spec C Club Car: Slow 05 STi Fav Mod: Loping Idle Location: Chewy's Garage Posts: 1,863 Join Date: Mar 2005 Trader Rating: (11)	Re: 05 STi, ST, Leaded fuel, missfire Ahh, I didn't catch that it was oxygenated. Good luck with it, report back your findings or shoot me a PM to compare logs.

05-09-2007, 04:45 AM	#18
WolfPlayer Moderator & ECU Tech Car: 05 CGM STI Fav Mod: mo boostaz Location: Fredneck, MD Posts: 3,639 Join Date: Jun 2004 Trader Rating: (6)	Re: 05 STi, ST, Leaded fuel, missfire Lead acts as a Detonation Antagonist. It seriously helps to prevent it. Being oxygenated just means that it can add more power when combusted (due to more O2). Thus, if you have detonation problems on leaded fuel, then unleaded race fuel will usually hurt the problem. If you don't have detonation problems, then the extra O2 will be a nice tiny power adder t This ad is not endorsed by this member. Please register or login to hide this ad.