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Thread: crate question

  1. #1
    Join Date
    Dec 2007
    Posts
    643

    Default crate question

    what yr. model harmonic balancer is the same as the one used on a 604 and is it legal to internally
    balance these motors?

  2. #2
    Join Date
    Oct 2007
    Posts
    959

    Default

    The 604 is internally balanced on the front of the engine but due to the crank configuration of a 1 piece seal the rear of the crank requires a added counter balance ---often referred to as external balance
    in reality only the back half is externally balanced
    to directly answer your balance question ---
    NO crate sanction permits any type of balancing (to my knowledge)

    the "old style" 8 inch balancer has been used for many years on production vehicles
    the "new style" (skinny) balancer has replaced the old style but is still an 8 inch balancer
    Both balancers are zero balanced (no counter weight)

    hope that helps
    Brad
    www.race-1.com

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