Thread: What's your answer to this question??
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  #10 (permalink)  
Old 11-01-2007, 07:57 PM
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Join Date: Jul 2004
Location: CONCORD, NH
Cobra Make, Engine: Gulf GT40 CAV137, Cobra ERA286
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I agree with Mr. Bruce! #2! I think there is more vac with the down stroke and open valve than outside pres.
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Gulf GT40 CAV137
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