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Re: Quadrajet Conundrum
You need to up your jet size 1 number per 2000 feet elevation. That's richer.
Timing affects your mixture because with max initial timing you can get your carb idling on the idle circuit. The timing speeds up your motor allowing you to close the throttle to get back to the idle circuit.
A quick check to see if you're idling on the power circuit is to adjust your mixture screws. If you can close one or both off all the way then you're idling on the power circuit.
When you get your timing bumped up and your idle turned down, you might find the richness goes away.
That's why the rule has always been "Timing first, carb second'.
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