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mark houghton mark houghton is offline
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Join Date: Jul 2008
Location: Central Washington State
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Originally Posted by jwasbury View Post

In my own testing, I found that the WUR responds only to boost pressure by lowering control pressure. It does not raise control pressure under vacuum. I believe others here (Alan L comes to mind) have had the same result.
Thanks. I was just operating on logic only - assuming the internal diaphram would move in both directions respective to boost or vacuum. To test it, I sensuously applied my lips to the hose barb, gently blowing and sucking like a street walker, and could hear the diaphram moving in both directions.
I'll just add this little tidbit to my memory banks.
Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.

Last edited by mark houghton; 03-05-2009 at 07:17 AM..
Old 03-05-2009, 07:04 AM
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