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Thread: My old 390 Tbird will only run at 45 btdc???
          
   
   

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  1. #11
    techinspector1's Avatar
    techinspector1 is offline CHR Member Visit my Photo Gallery
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    May 2003
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    Zephyrhills, Florida, USA
    Car Year, Make, Model: '32 Henway
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    I wrote this article on another forum for small block Chevies, but the procedure is applicable to any motor. If you used a dial indicator stem through the spark plug hole, that's where your problem began. But I still don't understand the 150 psi with 5 inches of mercury. It seems that if the cam was off enough to allow only 5 inches, it wouldn't make that kind of cylinder pressure when cranking.
    http://www.crankshaftcoalition.com/w...op_dead_center
    Last edited by techinspector1; 06-12-2011 at 02:02 PM.
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