Octane boost / Jet Fuel / Other Mixture Types
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I am curious if anyone out there has mixed in any type of fuels with premuim gasoline. If so then I would like to know if it made your car a little stronger & what type of fuel ratio you used.
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Jet Fuel is lower octane than premium its similar to putting kerosene in your car. I don't think its a bright idea. I am sure aviation gas is pretty high in octane though.
Last edited by pushing4wardbac; 05-19-2007 at 01:21 PM.
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Aviation gas is very (very!) high octane. It can cause problems with your injectors and various other components. On carbureted engines it is doable if you continually clean the valves and the carb. In injected engines, I hear it is a no-no. Just use racing gas, like everyone else.
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AvGas aka: 100LL (Run in most piston engined AC) will foul up your O2 sensors real quick. Remember the LL stands for "low-lead"
Jet fuel aka: JetA is basicly diesel. Not exactly the same, its just more refined with a higher flash point.
Neither will give you any gains other than seriously screwing up your car.
Jet fuel aka: JetA is basicly diesel. Not exactly the same, its just more refined with a higher flash point.
Neither will give you any gains other than seriously screwing up your car.
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and those octane additives do nothing at all for fuel injected cars (since our fuel amount is regulated by the ecu as to how much fuel goes into the cylinder), those are mostly made for carburated engines. so that means that if you buy cheap gas (non-premium) and put in a octane booster, you basically just bought cheap gas since that octane booster can not make up the difference to the proper level that true premium is refined to.
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Originally Posted by Z04
and those octane additives do nothing at all for fuel injected cars (since our fuel amount is regulated by the ecu as to how much fuel goes into the cylinder), those are mostly made for carburated engines. so that means that if you buy cheap gas (non-premium) and put in a octane booster, you basically just bought cheap gas since that octane booster can not make up the difference to the proper level that true premium is refined to.
The octane boosters you buy at stores like Auto Zone and such are pretty much useless. They raise your octane by a single point. It even says so on the label, if you read it
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If you want a real octane boost, you have several practical choices other than filling up with race gas. You can go to a hardware or paint store and pick up a gallon of Toluene. The effective octane rating of toluene is 115oct and is safe for our cars. If you add 1 gallon of it to 9 gallons of 93oct, you end up with roughly 95oct. Much better octane booster than the stuff from auto store. Another one is Xylene which is roughly the same octane, maybe slightly lower, like 113. You can always just dump denaturated alcohol like methanol or ethanol although large amounts of that stuff can have adverse effects on your fuel system. Methanol is particularly rough on rubber and some plastics. Also, alcohol is less energy efficient than Toluene or Xylene so you'll have better results with the Toluene or Xylene.
All this octane talk is only worth the effort if you can actually take advantage of it. If the ECU is already at the top end of your timing advance profile and you're not experiencing detonation, adding more octane to fuel will not yield more power. In fact, you can actually loose power with more octane than what your tune is set up for. The general rule of thumb is that for maximum power output, you want to run the lowest octane that you can get away with given your setup. Obviously, running with higher octane which allows you to run more timing, get the AFR closer to optimal torque range while increasing air flow will produce more power. So, do your homework to make sure more octane will really help you before you start trying to add more.
Last edited by Ziggyrama; 05-20-2007 at 08:00 AM.
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You can always run water/methanol.. My buddy runs aviation fuel in his single turbo supra (stock internals)... I believe its equivilant to 117 or 118 octane fuel...
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