gm_71chevelle Posted May 12, 2011 Report Posted May 12, 2011 hey guys I have a 2005 banshee with Toomey t6's, cool head, v force 3 reeds and k&n and I was wondering if there would be any benefit or negative to running race gas and if you had suggestions on what fuel to use. thanks guys. -Dylan Quote
bonerific250 Posted May 12, 2011 Report Posted May 12, 2011 (edited) With the mods you have you will be good with just running on 93 pump gas. Running stright race gas could lead to detto and a rebuild. you could do a mix but even at that you will notice little if any difference. But just for shits, whats your compression and dome size? Edited May 12, 2011 by bonerific250 Quote
bonerific250 Posted May 12, 2011 Report Posted May 12, 2011 With the mods you have you will be good with just running on 93 pump gas. Running stright race gas could lead to detto and a rebuild. you could do a mix but even at that you will notice little if any difference. But just for shits, whats your compression? Quote
gm_71chevelle Posted May 12, 2011 Author Report Posted May 12, 2011 I haven't checked my compression yet I just barely bought it and the guy said it has 21cc domes. so I thought I would ask. Quote
gotta_goatsfast Posted May 12, 2011 Report Posted May 12, 2011 Oxygenated race fuels will require rejetting. In your case with 21cc domes, High octane fuels will do nothing for performance as higher octane simply results in a slower and cooler combustion (good to resist high compression). Quote
newbatv Posted May 12, 2011 Report Posted May 12, 2011 higher octane fuel than needed actually loses horsepower. you need the lowest octane fuel you can use without detonating. Quote
gm_71chevelle Posted May 12, 2011 Author Report Posted May 12, 2011 oh ok that cleared it up for me. thank you for the info guys. Quote
Josh Z Posted May 12, 2011 Report Posted May 12, 2011 oh ok that cleared it up for me. thank you for the info guys. OK let me straighten this all out! Will you gain power simply by running race fuel? NO!!!! the only reason to run high octane fuel is to avoid Pre ignition or detonation (often caused by high compression). You do not gain power by running race fuel you gain power by running higher compression (requiring higher octane fuel) Quote
Bansheeejohn Posted May 12, 2011 Report Posted May 12, 2011 Oxygenated race fuels will require rejetting. In your case with 21cc domes, High octane fuels will do nothing for performance as higher octane simply results in a slower and cooler combustion (good to resist high compression). well said! ........really just throwing your cash away with 21cc domes, 93 octane will do fine ive been running 16cc domes in my cool head now for 10 years and yes extra compression equals more power but after all the coin ive spent on having to run straight racegas ........................................................its killing me! Quote
Josh Z Posted May 12, 2011 Report Posted May 12, 2011 With the mods you have you will be good with just running on 93 pump gas. Running stright race gas could lead to detto and a rebuild. you could do a mix but even at that you will notice little if any difference. But just for shits, whats your compression and dome size? For the record do not ever listen to advise from this guy! If he knew what he was talking about his first and only question would have been what your compression is not suggesting a 50/50 mix.... Quote
06specialedition Posted May 12, 2011 Report Posted May 12, 2011 If your not running 165-170 compression....don't waste your money. Quote
fastquad02blaster Posted May 13, 2011 Report Posted May 13, 2011 If your not running 165-170 compression....don't waste your money. The reason for race fuel is high compression. Race fuel wont cause detonation, nor will it cause engine problems. I'm with everybody who said don't waste your money. It will actually make your bike run worse. It sure smells good though. Quote
06specialedition Posted May 13, 2011 Report Posted May 13, 2011 The reason for race fuel is high compression. Race fuel wont cause detonation, nor will it cause engine problems. I'm with everybody who said don't waste your money. It will actually make your bike run worse. It sure smells good though. X2 on running worse. I ran out of pump gas while riding so my buddy gave me some 50/50 mix of 110.....My bike ran, but it sure didn't run the same. I'll stick with pump since I'm not running high compression. Quote
mopar1rules Posted May 13, 2011 Report Posted May 13, 2011 I just laugh and shake my head, whenever someone says "if you don't have 160-170psi or so, you don't need race gas." DO NOT use compression gauge readings, dictate what octane fuel to run. A compression gauge is simply a tool used to measure cranking compression. You need to know UCCR and CCR of motor to accurately know what fuel to run. I don't know why this compression thing ain't a sticky or something?? It should be, so people simply stop using their harbor freight compression tester to dictate the octane requirements of their motors. Quote
mopar1rules Posted May 13, 2011 Report Posted May 13, 2011 I also laugh when people think race gas causes deto, makes more hp on pump gas compression ratios, and that it causes harm to engines. It does NONE of the above. There should be a sticky as well on race gas, so these questions hopefully don't keep popping up. Quote
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