Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - need advise on testing msd btm with pump
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Old 12-05-2012, 04:00 AM
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Vacuum is the oposite of boost pressure. The pump needs to create pressure.
If it cannot be reconfigured to be a +pressure pump, it will not work for you.
@ just 5 psi boost you should not need much retard. (assuming good fuel)
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