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Thread: Aviation Fuel in a high comp engine

  1. #1
    Senior Member MASTER BUILDER
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    Aviation Fuel in a high comp engine

    I have a 415 sbc engine That has about 12.5 /1 comp. I would like to run it on the street and wondered if aviation fuel would be ok in it. I have been told yes and no. I have never used it but it is a lot cheaper than race fuel. :?

  2. #2
    Senior Member RACING JUNKIE
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    There was a great post on yellowbullet and I'd never run the stuff in anything I have. I tried to find it and couldnt
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
    419-280-1406
    Lanning Electric
    Complete Drag Car Wiring
    APD Race Engines
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  3. #3

  4. #4
    Senior Member DYNO OPERATOR
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    About 14 years ago I lived 1 mile from an airport. I used to run aviation fuel 100LL (100 octane low lead) in a 13 to 1 BBC. Never had a bit of problem with it. Now I did have to go up (I think ) 2 jet sizes on my carb. Since 9-11 I don't know if they will still sell it to the public. If it's available to you, I wouldn't be afraid to run it in a 12.5 to 1 motor.

    TS1955

  5. #5
    Senior Member RACING JUNKIE fla1976's Avatar
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    Fuel

    I used to run it as it was cheaper than race gas and ran without problems. It is still avaiable, but is harder to find. Find a small private airport, they usually have it. The airport here uses Shell Fuels.

  6. #6
    Senior Member RACING JUNKIE
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    It'll run fine, but the octane is not tightly controlled, in most cases it's only guarenteed to be over 102, but it is illegal for someone to sell for street use.

    Zip

  7. #7
    Senior Member RACING JUNKIE
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    What is the difference between AV GAS and "CAR GAS"?

  8. #8
    Senior Member RACING JUNKIE fla1976's Avatar
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  9. #9
    Senior Member RACING JUNKIE
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    Gas

    Bottom LINE!
    Its FINE,i also use to run it ALL the Time in my 468"Chevelle back in the Late 70's Ealy 80's.
    BUT.....................?
    I ALWAYS would add some Type of Leaded Fuel,or Lead Additive.Its VERY DRY.
    Later
    G 8)

  10. #10
    Senior Member RACING JUNKIE
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    Quote Originally Posted by Tod74
    http://www.yellowbullet.com/forum/showthread.php?t=125553&highlight=AVIATION+FUEL

    http://www.yellowbullet.com/forum/sh...=AVIATION+FUEL

    Here's two.

    Still not the one I was looking for, someone took the time to explain what was missing in the stuff that makes it no good for us. I looked earlier today again and still couldnt find it. I do know a local used some and switched to torco 116 and picked up over a tenth 1/4
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
    419-280-1406
    Lanning Electric
    Complete Drag Car Wiring
    APD Race Engines
    www.apdracing.com


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