Tryin to figure out my comp ratio
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Tryin to figure out my comp ratio

  1. #1
    Senior Member Swain's Avatar
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    Default Tryin to figure out my comp ratio




    Piston, Forged, Dome, 4.280 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring, Chevy, Big Block

    Heads are 990, 2.19 / 1.88 valves 118 cc chamber and 318 cc intake port

    The motor is a 454 4 bolt main

    Stock length rods.

    Crank is 4.00" stroke forged 1053 LS6

    Cam Isky z55 254 duration, 590 lift solid flat tappet

    Jason
    Last edited by Swain; 06-09-2010 at 09:42 AM.

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    Senior Member Futs's Avatar
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    what are the cc's on the head chambers,how far is the piston in the hole and what is the head gasket thickness and bore size? What size dome on the pistons?
    Last edited by Futs; 06-09-2010 at 09:36 AM.

  4. #3
    Senior Member UNASHAMED's Avatar
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    Is your block zero deck or are the pistons in the holes and need combustion chamber numbers
    "Don't make me get my penguin"

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  6. #4
    Senior Member Swain's Avatar
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    Quote Originally Posted by Futs View Post
    what are the cc's on the head chambers,how far is the piston in the hole and what is the head gasket thickness and bore size? What size dome on the pistons?
    2.19 / 1.88 valves 118 cc chamber and 318 cc intake port 990 HEADS SORRY

    Deck i think is stock height

    Compression Distance (in)
    1.645 in.Dome Height (in)
    0.221 in.Piston Head Volume (cc)
    -29.40cc
    Normal felpro gasket.

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