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Re: Another fuel mileage debate...
Quote:
Originally Posted by propanemudtruck
at what amount of vaccum? Do engines measure in inches water column like gas pressure?
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Inches of mercury. Most stock engines with a mild cam will be able to pull about 18-20" at idle. I think the transmission vacuum switches are usually set to open somewhere around 4-6", but some of the aftermarket switches are adjustable.
Ray
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Last edited by raycow; 11-15-2010 at 11:21 PM.
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