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  1. #1
    Join Date
    Feb 2004
    Edmond, Ok.

    Cam selection 383 SBC

    Currently running a 383 SBC with Vortec heads (2.02 &1.60) with substantial port work.
    Comp hydraulic roller:
    224/230 @.050
    145/151 @.200
    112 LSA
    3.0 overlap @.050
    54. overlap @seat
    10.0 static CR.
    Stainless marine exhaust. This motor pulls hard to 5400rpm, idles well at 800rpm in neutral and idles decent at 650rpm in gear. No Reversion issues.

    I've built a new 383:
    AFR 195 heads
    10.2 static CR.
    My question is cam selection. I want a "little" more cam, but still want decent driveability and not worry about reversion.
    "Ultradyne-Bullet" cams have several grind profiles that are a step up from the Comp profile. I can have these ground on any LSA. How much is too much duration @.200 or too little?
    How much overlap can my exhaust handle?
    Last edited by LMAC; 06-26-2005 at 11:03 AM. Reason: change heading

  2. #2
    Gold Member Gold Member Iggy's Avatar
    My Boats:
    '88 Formula F-206 LS
    Join Date
    Jan 2001
    Kissimmee, Florida

    Re: Help with cam selection 383 SBC

    The cam you say you already have looks a lot like the GM "HOT" cam p/n 12370846. GM installs this cam in their ZZ383 crate motor and it pumps out 425 hp @ 5400.
    This cam is one of Dennis Moore's recommendations from his book.

    Hot cam specs:
    Duration @ .05: 222/230
    Lift w/1.5:1 rockers: 509/528
    LSA: 112

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