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    Results 1 to 3 of 3
    1. #1
      Join Date
      Sep 2012
      Posts
      31
      Country Flag: Ireland

      Help with 502 timing specs

      Hi guys,

      I just picked up my new '47 Buick Super streetrod and it has a crate 502 chevy engine. All I got with the car was 4 pages detailing the customisations made to the car, but no details on the engine other than its a "crate 502".

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      I've pulled the numbers off the block (14096859) and the casting date (C313) and from what I can tell its a 502 GEN V - but I need help confirming that.

      Also, where can I go to get the stock timing specs? The Chevy site seems to just list the details for the current engines.

    2. #2
      Join Date
      Nov 2013
      Posts
      25
      Country Flag: Canada
      I see you have an HEI. You need to know what part number it is, and what amount of centrifugal advance it has been set up for. The 502 is a mild engine. You will want to have around 14 degrees timing at idle, and 36-38 at full advance by 2800 rpm. Then connect the vacuum advance to full manifold vacuum so that you have 26-28 advance at idle.

      I would also strongly advise to get rid of that power robbing and poor cooling flex fan, install a thermostatic clutch fan, and a proper shroud for it, which the blades sit half into and half out of the shroud.

    3. #3
      Join Date
      Apr 2001
      Location
      The City of Fountains
      Posts
      15,971
      Country Flag: United States
      Quote Originally Posted by hipockets View Post
      I see you have an HEI. You need to know what part number it is, and what amount of centrifugal advance it has been set up for. The 502 is a mild engine. You will want to have around 14 degrees timing at idle, and 36-38 at full advance by 2800 rpm. Then connect the vacuum advance to full manifold vacuum so that you have 26-28 advance at idle.

      I would also strongly advise to get rid of that power robbing and poor cooling flex fan, install a thermostatic clutch fan, and a proper shroud for it, which the blades sit half into and half out of the shroud.
      ^^^Sound advice.



      Andrew
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