what can i do to my car to get the most horsepower with my car on av gas?

 

Unless you have some secret mods that you haven't listed, any fuel over about 94 octane is going to be a waste of money.

Some aviation fuels are "leaded" and will destroy O2 sensors and cats. Aviation fuels do not have the correct vapor pressure curve for street application in an auto engine.

To reach a state where you might require a small quantity of aviation gas to control detonation, I'd estimate you would need a 550HP stroker, forged bottom end, and a 300-350 shot of nitrous on top of that. VP Fuels "Air Race" is about $9.50 a gallon.

 

while avgas is cheap, like already stated, its leaded. look on the side of the avgas fuel truck at your local airport 100LL means 100 octane Low Lead. also, if u needed it anyways, the guy can simply fill up your tank. you have to pretty much have connections and have them fill up containers of it. you could try saying you have an ultralight, have heard people do that before. i personally use a 50/50 mix of avgas and premium for my dirt bikes.

 

i heard that all i have to do is raise my compression and av gas would help me out. what would the compression ratio of my car and what can i do to raise my compression?

 

AVgas is mean to burn at a higher altitude also. your compression is 10.5:1. you can mill the heads change pistons/rods etc to raise the compression.

there is no real benefit to running avgas,unless you are stuck in the 60's. Race fuel is so much more advanced it's not funny.

 

100LL is only low lead in comparison to other avaiation fuels...its still going to have more lead than pump gas will and it will clog up your O2 sensor good. If you really want more Octane, consider adding Toluene or Xylene in proper amounts to your fuel...
http://www.gnttype.org/techarea/misc/octanebooster.html
Unless your running some sort of FI where you can turn up the boost, additional octane isn't going to help you. Compression ratio is the ratio between the volume of the cylinder when the piston is at bottom dead center vs the volume of the cylinder when the piston is at top dead center. You can change compression by altering your engine internals, changing the combustion chamber size, or using smaller head gaskets. Any of them is going to require you to pull the engine apart to do it, and the gains would be minimal at best unless you get different pistons.


disclaimer: Both these chemicals should not be handled if your clumsy or don't know what your doing. If you kill yourself or blow up your house, we warned you.

 

all right then i guess its not worth it, im just gonna go with nitrous if i want the real gains. but i just changed out my plugs to tr55s and i need tr6s for nitrous, damn it, it was a pain in the *** to change the plugs too!

 

how much nitrous do you plan on using? the tr55's might be fine.....

 

in the beginning 100wet then when i get money for a centerforce a 150 wet...

 

I've heard that AVgas is not good to use in a street app regardless of necessity, not because of the lead content, but because it is heavier. It has more oxygen per lb., and will make the car burn hotter and leaner, than a normal race gas. There is more oxygen in AV gas because of the altitude. Anyone have any more info on it?

 

There is no "oxygen" in AV gas, or any other kind of gasoline. Nitromethane - yes... brings its own O2 to the show.... but gasoline is simply carbon and hydrogen. Only alcohol additives - ethanol and methanol - contain oxygen, but that is not readilly avialable for combustion. It just changes the compostion of the exhaust gas to control emissions. And they aren't usually used in aviation gasoline.

Some fuels may be "heavier", but that just means the specific gravity is high.... more pounds/gallon. But that means more pounds of carbon and hydrogen per gallon, not oxygen.

Typically, aviation fuels have a supressed vapor pressure to keep them from boiling at higher altitudes.

There is nothing harmful in the chemical compostion of aviation fuels. I routinely blend VP Fuels Air Race with their C16 leaded racing fuel to control detonation with large shots of nitrous.