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 jimmcc View Post
Is this true for the stock wastegate?


Yes. It's somewhat of an additive affect with exhaust pressure adding to the air pressure needed to open the WG. If you want relatively accurate results, you should do the test on the car with the engine running.

As an example, with a stock .8bar spring and the WG off the car, typically you need in the neighborhood of 15psi to open the valve.
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 04-17-2010, 07:21 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)