FULL_METAL_JACKT Posted March 10, 2004 Report Share Posted March 10, 2004 Ok........ Just wanted 2 know what every1 thinks about these fuels. Is there a difference?? (Besides Price) Will it make a difference in engine performance or temperature??? M Quote Link to comment Share on other sites More sharing options...
Lanky Posted March 10, 2004 Report Share Posted March 10, 2004 Race gas. AV gas is ment for low rpm engines that run at high altitudes. I would not run AV gas. Quote Link to comment Share on other sites More sharing options...
Indubitably Posted March 10, 2004 Report Share Posted March 10, 2004 I've run both and have never really fealt a difference so go with which ever is cheaper. Quote Link to comment Share on other sites More sharing options...
DUNEDEMON Posted March 10, 2004 Report Share Posted March 10, 2004 I would urge you to look into the specifications of the fuels in question. My understanding is that "Av Gas" can be different from one place to another. VP racing fuels (what I run) publishes their fuels spec's for the consumer to make an informed decision. It is also important to keep in mind that octane rating and motor octane are two different numbers, and should be looked at closely. Quote Link to comment Share on other sites More sharing options...
FULL_METAL_JACKT Posted March 10, 2004 Author Report Share Posted March 10, 2004 oh...... Contraversy!!! I like it kepp it comming! I need more info from people to make a sound decision. I am at sea level M Quote Link to comment Share on other sites More sharing options...
SyNtAxx Posted March 10, 2004 Report Share Posted March 10, 2004 Hey, Maybee the question is this: Are you flying a 4 wheeler....or driving an airplane ? Nick Quote Link to comment Share on other sites More sharing options...
FULL_METAL_JACKT Posted March 10, 2004 Author Report Share Posted March 10, 2004 LOL Quote Link to comment Share on other sites More sharing options...
XTShee Posted March 10, 2004 Report Share Posted March 10, 2004 Jim for passion told me I would be sweet running AV with the motor hes making me. Will be using 20cc domes at sea lvl So thats good enough for me. Quote Link to comment Share on other sites More sharing options...
DUNEDEMON Posted March 10, 2004 Report Share Posted March 10, 2004 Try looking into the major race fuel manufacturers (Vp, Sunoco, Unocal, Trick etc..) spec's or FAQ's this may provide some answers, if nothing else it will give you some more information. Quote Link to comment Share on other sites More sharing options...
'99350t Posted March 11, 2004 Report Share Posted March 11, 2004 i run AV gas in my Tecate with 175lbs of compression. i would never in my right mind spend 7.00+/gallon for race fuel, speccially since mine gets around 15 miles to a 2.75 gal tank. av does have lead in it, but you can buy the low lead (100LL) i spend about 2.70/gal on AV gas, which is good. Quote Link to comment Share on other sites More sharing options...
MotulMonsta Posted March 11, 2004 Report Share Posted March 11, 2004 Well, AV is rated differntly then race fuels and pump gas. a 103 octane rated av fuel might be the equivelent of a 92 grade pump gas. They use a diffrent formula. Also AV gas contains anti-icing additives that could potentialy harm a two stroke motor. Kinda like jet-a isn't good for deisel trucks..the trucks will run good but it will ruin the motor. All in all the AV gas is formulated to provide a reliable fuel for high altitude flying at constant rpms. It made to keep carbs & fuel injection from icing and operated under heavy loads. I wouldn't run it. Quote Link to comment Share on other sites More sharing options...
FULL_METAL_JACKT Posted March 11, 2004 Author Report Share Posted March 11, 2004 WOW!!!!! Alot of different oppinions!! Keep them coming! Quote Link to comment Share on other sites More sharing options...
orion6781 Posted March 11, 2004 Report Share Posted March 11, 2004 they only put anti icing in av gas durring winter time. the gas in an airplane passes the oil which cools the oil and heats the gas. Quote Link to comment Share on other sites More sharing options...
Meat Posted March 11, 2004 Report Share Posted March 11, 2004 What bugs me is, there's all these reasons why AV gas is not suitalbe for quads, from the high altitude forumla to the anti icing crap, but what bugs me is I know a few respected guys who run AV with no problems, never and have been running it for years. Plus its a hellava lot cheaper than VP. Last summer I was burning 10 to 15 gallons of gas per weekend, if I had to pay 7 bucks a gallon Id need to get a better payin' job . I just put 20cc domes in and my compression jumped from 130 to 165, I need hi octane and im gettin' some AV Quote Link to comment Share on other sites More sharing options...
PassionRE Posted March 11, 2004 Report Share Posted March 11, 2004 Avgas is not a blanket fuel for any purpouse. In an all out purebred race engine race gas is best...period. For engines that are in that grey area of potential detonation, Avgas is fine...and yes, the Octane is definately higher than 92 automotive fuel. As for damaging to 2-strokes, 20 years of use never showed that to me. I broke the waterspeed world record in 91 with a replicated H-2 Induction Kawasaki 536cc twin 46mm sidedrafts running 305psi on avgas and that motor was dependable enough to let my daughters run around the lake on all day long, and those motors are under 6 times the stress, and much more likely to detonate than a Banshee motor...Jim Quote Link to comment Share on other sites More sharing options...
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