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Thread: clearance

  1. #1

    clearance

    i got 0.085 valve to piston clearance on a 496 bbc .it will only see the track .will be good ???

  2. #2
    Senior Member RACING JUNKIE jmarksdragster's Avatar
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    Intake is fine, exhaust needs to be at least .110 to .120.
    Mark Whitener
    http://racingfuelsystems.myfunforum.org
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  3. #3
    Senior Member EXPERT BUILDER
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    Is that with or without lash?

  4. #4
    Senior Member RACING JUNKIE jmarksdragster's Avatar
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  5. #5
    Senior Member RACING JUNKIE
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    I always heard .080 int .100 exh I check mine with zero lash so I have a cushion

  6. #6
    Senior Member DYNO OPERATOR
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    Quote Originally Posted by Tod74
    I always heard .080 int .100 exh I check mine with zero lash so I have a cushion
    Yep me too. Those are safe numbers. You can run them considerably tighter depending on max rpm and rod type. Many stock eliminator cars run under .040, but they don't usually expect to get 300+ passes either...

  7. #7
    some say yes same say no hmmm??

  8. #8
    Senior Member RACING JUNKIE mytmouz's Avatar
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    When in doubt, don't take a chance...
    If you think nobody cares, try missing a payment...


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