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I'm leaning toward timing, or mechanical advance curve. The curve binding, dropping off erratically, or not operatin smoothly under light throttle conditions.
Idles at 14" so asumming no intake leaks or tight valves that is simply your somewhat "radical" cam as 14" IS a low signal. 18 is more "normal" (stock).
Off idle up to 2200 rpm under light throttle accelleration is OK, then BAM 2200 rpm and a "stumble" occurs. Something is makeing a transistion right there. Hook up your vacuum gauge and run the hose into the cockpit so you can watch it while you drive.
My guess is vacuum is REAL low when you take off and builds UP as you approach 2200 rpm and THEN the advance curve changes. Vac advance suddenly kicks in? Kickc out? Mechanical advance wieghts or springs binding/sticking until higher rpm is gained?
Ernie
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