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I've used an older Powerdex AFX system to tune my 750 Quickfuel. Newer systems with recording capability are better, but it still worked well. I'm amazed how the idle circuit is ignored with a lot of tuning. Up to about 1800 rpm you're still on idles and they factor in transition above that too. Ditched my Holley because it had no idle jet adjustability. Quickfuel changeable idle fuel and air jets are invaluable in tuning. Out of the box carbs routinely have rich idles.
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