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Originally Posted by Funanin would replacing the vacuum lines with rubber hose that is rated at 15 psi +/- cause a surge if my vacuum pulls at -17.5 psi at idle? |
Vacuum is measured in inches of mercury, 30 inces of vacuum = roughly 15 psi. Hose designed for pressure will generally carry vacuum with no problem. Vaccum would try to colapse a hose with no reinforcement by sucking it flat, like a soda straw stuck in the ice cream in the bottom of a milk shake.
With this in mind, the cause of your surge is not the rubber hose.