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Reply to "Vacuum"

...Also; My idle RPM is 1000. I can make it idle as low as 700 or so. OR 1000-1200 sounds good. This is by the 'Dash' Tach, which is not accurate enough for this kind of work. One thing you might try is to 'Kick-up' the set screw under your Secondary Butterflys to increase RPM and then close your ptimaries to bring the Vacuum up, more. This gained me aprox. 1 or 2 more INCHES. Not a whole lot. The only reason, I can think of; why your float bowl would be draining overnight, could be a crack in the Plate or Body, or leak in a gasket, perhaps the gasket is missing behind one of the lower 'Bowl Screws'. The only other time I saw a Bowl drain, and this was at a very Fast rate; and WHILE the engine was running, was from a Blown POWER VALVE. Good-Luck with it!...
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