Quote:
Originally Posted by baddest434
john it comes with a vavle reliefto create more /less vacuum. but still recommends a pressure gauge on the valve cover to see the exact amount of vacuum in your engine
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i had on the last car we had one on - drilled and taped the valve cover and ran a vacume gage in side to i could see what it was doing -- do they give you an inch # that is recommended never seen instructions on one of those pumps - we always took an avarage low engine speed to max - jz