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Thread: Crank/Cam

  1. #1
    Senior Member RACING JUNKIE
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    Crank/Cam

    1. How much crank thrust is allowable on a stock crank shaft? 327/LE 275HP stock motor.

    2. W/ Stock internals, 202/160 aluminum heads, new RPM intake, 4-spd trans, what is a good cam lift/duration without going to high but getting decent choppy sound?

    3. Oil pump: stock or high volume???

    4. Quiet gear drive... still pretty noisy? Bad idea/good idea? never ran one....

    Just freshening this motor; keeping it pretty stock.
    "I would walk through hell on Sunday before I fear the enemy"

  2. #2
    Senior Member MASTER BUILDER
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    Apr 2003
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    Brookings South Dakota
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    4 Speed thrust clearance .005" to .009"

    Hydraulic Flat tappet, Comp Cams 12-242-2 or 12-246-3, after more of a lopey sound, 12-600-4 or 12-601-4 Muther Tumper cam.

    Stock Volume pump is fine for Street use.

    Gear drives I would stay away from, I would stay with a good roller timing chain.
    Competition Engines & Hardcore Engine Parts
    www.cnc-motorsports.com
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  3. #3
    Senior Member RACING JUNKIE oldandtired's Avatar
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    Quote Originally Posted by cncmotorsports
    Gear drives I would stay away from, I would stay with a good roller timing chain.
    x2 The harmonics are transferred to the crank and it's bad news for cast iron cranks.
    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

  4. #4
    Senior Member RACING JUNKIE
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    That makes sense on the gear drive... never thought about that... they must be dang rigid on internals that are stock.
    "I would walk through hell on Sunday before I fear the enemy"


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