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Hot Rods av gas

Discussion in 'The Hokey Ass Message Board' started by blackanblue, Jun 4, 2019.

  1. Higher octane = more heat .
  2. jimgoetz
    Joined: Sep 6, 2013
    Posts: 264


    No it doesn't. It can take more heat before it detonates so it can run higher compression or more lead before it knocks.
    Ericnova72, G-son and dirty old man like this.
  3. 28dreyer
    Joined: Jan 23, 2008
    Posts: 1,093

    from Minnesota

    I believe Pete is confusing his flat head compression ratio with the 14.7:1 stoichiometric ratio for gasoline fuel. LOL
  4. Pete1
    Joined: Aug 23, 2004
    Posts: 1,624

    from Wa.

    It is your head.. You can think anything you want with it.
    I meant what I said.
  5. I put 115/145 av gas in my 47 Buick and drove it 5 miles , opened the hood and the whole exhaust manifold was glowing red. didn't do that any more.
  6. Ericnova72
    Joined: May 1, 2007
    Posts: 128


    But this wasn't the fault of the was your fault for not re-jetting the carb to match the different fuel.
    Jetted correctly it would have been just fine....although your Buick was probably of low enough compression it wouldn't have made a lick of power difference.
    G-son likes this.
  7. gimpyshotrods
    Joined: May 20, 2009
    Posts: 15,944


    What is the compression ratio of your 355, and how much boost are you running (or what over/underdrive), and which blower?
  8. lippy
    Joined: Sep 27, 2006
    Posts: 3,935

    from Ks

    Back in the day we use to run 12.5 to 1 and even higher on the street and run it every day. To school, work, streetracing ect... We would get blue or even purple avgas and run leaded ethyl premium with it. You could just about throw all the timing you wanted at it. So much Tetraethyl in it, the carbs would be red on the outside. :D
  9. a boner
    Joined: Dec 25, 2004
    Posts: 4,956

    a boner

    I've heard that AV gas doesn't varnish up a carb like regular gas can. And it also stores better, if your vehicle sits unused a over winter.

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