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Thread: octane number

  1. #1
    Senior Member RACING JUNKIE
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    octane number

    my new motor will be 13.2 to1 compression
    what octane number will I need to safetly run this motor
    A friend of mine says he has used 108 with booster
    others say 110
    what do you guys use for fuel in a simmilar compression range, That I will have

  2. #2
    Junior Member JOURNEYMAN
    Join Date
    Dec 2007
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    My old moter had 13 to 1 compression. I ran 110 in it. I used to spray 150 to 175 NOS running 110 octane and never had detonating problems. Running NA or spray. That moter still lives, I sold it and went bigger. :wink:

  3. #3
    Senior Member RACING JUNKIE mopar1968's Avatar
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    My little small block is almost 14.1 and i run 112 in it with no problems :!: :!:



    ''JUST MY TWO CENT'S WORTH''
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  4. #4
    Senior Member RACING JUNKIE
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    13-1 in my BBC, 110 works fine.
    ***IN GOD WE TRUST***

  5. #5
    Member MASTER JOURNEYMAN
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    Unless you plan on going way up in the atmosphere with RPM 110 will be fine. Leave the "Octane Booster" on the shelf.

  6. #6
    Senior Member DYNO OPERATOR
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    13.5 110 No problems

  7. #7
    Senior Member SENIOR BUILDER
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    Why would you even want to use "octane Booster" ? It only boosts octane 4 points at best. From say 93 to 93.4, and thats as advertised. Ill bet its even less with higher octane.
    Now if you were a body shop guy and had access to 55 gallon drums of Xylene or Touline that might be a differant story.

    Craig
    98 Camaro, RJ Car,540 Reher/Morrison, PG,
    8.12@167
    86 Buick GN, 10.50@129
    87 Buick GN, 11.30@116
    http://i43.photobucket.com/albums/e3...y2010-1a-1.jpg

  8. #8
    Senior Member RACING JUNKIE
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    Quote Originally Posted by gnsrule
    Why would you even want to use "octane Booster" ? It only boosts octane 4 points at best. From say 93 to 93.4, and thats as advertised. Ill bet its even less with higher octane.
    Now if you were a body shop guy and had access to 55 gallon drums of Xylene or Touline that might be a differant story.

    Craig
    I am asking because this is new to me, I have only had 9.5 to 1 motors, this is my first high or higher compresion motor

  9. #9
    Senior Member RACING JUNKIE
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    I run Sunoco 110 in mine with 38 deg total timing, 13 to 1 no issues.

  10. #10
    Senior Member RACING JUNKIE
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    Mar 2003
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    Fountain,MICHIGAN
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    856

    Octane

    110 Goes a LONG Way!
    You will be Fine!
    Unfortunately, 2 years ago,I could buy Torco 110 for 3.50-360 per gallon.Last season 6-8.00.The Price of going Fast!
    Later
    G 8)

  11. Racing Junk


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