View Single Post
mark houghton mark houghton is offline
Registered User
mark houghton's Avatar
Join Date: Jul 2008
Location: Central Washington State
Posts: 3,776
Originally Posted by 911st View Post
That helps.

I had it backwards.

The exhaust pressure is trying to push the WG open. Thus, it is pushing against the surface area of the valve head and trying to open it.

I am wondering if testing on a bench or at idle installed is just a check to see if it is functioning and a rough check as to boost level.

There seems to be other variables like the quality of the WG tube connection to the exhaust manifold, spring rate, surface area of the valve, turbo configuration...

Probably the only real test is on boost with a boost gauge in place.

Now you're getting it!
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.
Old 04-18-2010, 04:09 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #13 (permalink)