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She's almost an eye burner now at idle, and my plugs are at least brown.... changed the PV about 4
times last fall. I have a 4.5 in there now running
at 9 InHg vacuum. I was thinking maybe the acc pump
squirters might be the culprit?
You didn't mention what you are using for a cam. But anything with more duration than stock typically means more overlap which means you need more intital timing. I running a Comp XE268H cam and I get max manifold vacuum with 17 degrees BTDC for my inital. Anytime you tune an engine getting the timing dialed is the first step.
If you are pig rich at idle with a Street Avenger carb I would say you need more timing. When i went to the 670 it had to be the closest thing to spot on I had ever tried. Tweaked the idle mixture screws, set the idle speed and called it a day and have not touched it since.
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