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Thread: compression ratio

  1. #1
    Senior Member EXPERT BUILDER
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    compression ratio

    can i run 11:1 in a 406 sbc on pump gas 91 octane no ethanol added?
    thanks
    -logan

  2. #2
    Senior Member RACING JUNKIE oldandtired's Avatar
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    Do you have alumnum heads?
    Carb or FI?
    Dave
    http://www.racingjunk.com/profile/343797
    "All that is necessary for the triumph of evil is for good men to do nothing" Edmund Burke

  3. #3
    Senior Member EXPERT BUILDER
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    Re: compression ratio

    Quote Originally Posted by mrbigtrucks
    can i run 11:1 in a 406 sbc on pump gas 91 octane no ethanol added?
    thanks
    -logan
    You should find out what your dynamic compresssion and go from there!
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  4. #4
    Senior Member EXPERT BUILDER
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    carb and it'll probably have procomp aluminum heads unless i can afford more when the time comes

  5. #5

    Pro Comp are junk

    Save your money and buy USA Made Heads!!!!
    Pro Comps are junk.
    Have bad installed valve guides,some have stripped stud threads, some are 20
    to 30'' of being straight,some come cracked, and many other problems with
    cheap labor.
    I sold Pro Comps for 3 months out of 74 sets I've sold after 2-8 months
    39 sets had minor to major issues. 23 sets were unrepairable or too expensive
    too even attempt to fix.
    JMO Save your money buy AFR,Brodix,RHS,Dart heads. 8)

    Only a rich man can afford to buy junk because he has plenty more to dig himself out if all else fails.

  6. #6
    Senior Member SENIOR BUILDER
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    Re: compression ratio

    Quote Originally Posted by hink
    Quote Originally Posted by mrbigtrucks
    can i run 11:1 in a 406 sbc on pump gas 91 octane no ethanol added?
    thanks
    -logan
    You should find out what your dynamic compresssion and go from there!
    x2

  7. #7
    Senior Member DYNO OPERATOR
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    central Illinois
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    Compression

    Have you looked at water/alcohol injection? Reduces detonation potential.

    Was a fad a few years ago and its back again. I see it in JEGS.

    You can use windshield washer fluid.

    It is $300 approx for the kit.

  8. Racing Junk


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