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Thread: COMPRESSION QUESTION

  1. #1
    Senior Member DYNO OPERATOR
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    Apr 2008
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    COMPRESSION QUESTION

    CAN I GET A GUESS AT WHAT COMPRESSION I HAVE IN MY 406.
    FLAT TOP PISTONS WITH 2 VALVE RELIEFS,STOCK BLOCK 4340 CRANK 6"HBEAM RODS,64CC AFR HEADS.WOULD MORE COMPRESSION MAKE MORE HP AND ABOUT HOW MUCH MORE.

  2. #2
    Senior Member RACING JUNKIE mytmouz's Avatar
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    May 2006
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    Depends on other factors such as deck height, etc., but somewhere in the 10:6 to 11:0 range I would say...
    If you think nobody cares, try missing a payment...

  3. #3
    Senior Member RACING JUNKIE
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    Quote Originally Posted by mytmouz
    Depends on other factors such as deck height, etc., but somewhere in the 10:6 to 11:0 range I would say...
    agree

  4. #4
    Senior Member RACING JUNKIE
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    Useing the wallace calculator, with a .041 head gasket and a "0" deck height, with 6cc valve reliefs which is common for eyebrow pistons it comes to.

    Your displacement is 406.77 CID
    The Compression Ratio is: 11.53

    course there are lot's of factors to change this as mentioned in the earlier posts, such as deck heigth, difference valve reliefs and different gasket thickness.

    JMO

    Zip.


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