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-looks like you changed the vac spring before the engine was ran w/ this carb. Very easy to get the diaphram off center. Could have a huge vac leak at the pod.

-- nope, changed it while it was on the engine.

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-are you running a choke?

-- running a choke.

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-I bet you have a vac leak someplace. If not at the above spots, someplace. Have you went over all of the intake areas with carb cleaner to check?

-- I have not done this.

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-how sure are you that the TDC mark is reliable? Maybe you have a bunch more timing than you think.

I am not sure. But the initial makes sense based on other's setups. I dialed it in with the max vac then pull back 1 inhg method. Total mechanical is then relative to the initial. Maybe it is still too much and I could try to take even more out.


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-have you tried different gas stations?

-- Yes

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I really find it hard to believe that a 9.2 to 1 engine w/ aluminum heads pings on 93 octane w/o any vac advance at all.

--- Me too. I didn't check any plugs after I finished up last night. I guess I'll start plugging off ports (not that this has many accessories) to see if maybe that's the issue.