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Re: HEI distributor tuning problem
Quote:
Originally Posted by JOJABOY
Those numbers sound good. So now you just have to figure out what is finicky about your particular engine. Keeping in mind that different cams, plugs etc. will cause your engine to differ from the standard curve. I would try backing my initial timing from 12* down to 9* or so.
50* is your "all in" and that seems to be causing predetonation and causing the noise. But before you adjust the timing. Try this first.
Unplug your vac advance from the carb port and cap it. Then plug it into the intake vacuum. (the port on the very bottom of your carb) Take it for a drive then revisit your timing curve. Worth the try. Only take 30 seconds to switch it to the other port and the drive time.
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I tried that the other day and it pinged like a son of a gun.
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