View Single Post
JFairman JFairman is offline
Registered User
Join Date: Jul 2006
Location: S. Florida
Posts: 7,289
Turning the knob on any air pressure regulator clockwise no matter what it is being used for increases ternsion on the internal spring.
You are increasing boost by turning that knob clockwise if that's what you are doing.
Turn it counter clockwise all the way till it stops and see what happens if it's even hooked up and doing anything at all.

Cheap air pressure regulators like that one usually have a plastic knob that locks in place when pushed down and unlock when pulled up about 1/8". Then it will turn.

It's installed by putting a metal Tee fitting in the boost pressure line from the intercooler end tank going to the wastegate bottom fitting.
One side of the Tee goes to the bottom wastegate fitting that opens the wastegate like before and the other side of the T goes through the air pressure regulator so that feed becomes adjustable and then on to the top fitting on the wastegate which origonally vents to atmosphere in a 930.
That way you can control the differential pressure between the top and bottom sides of the diaphram in the wastegate, and that controls when it opens and then boost level becomes adjustable.
It's very simple and the results are linear and controlable from inside the car.

Just takes some knowledge, high octane fuel, and self control to keep from overdoing it and blowing up the motor.
With stock CIS it's a bad idea because it will run lean, break ring$ from too much detonation, and melt piston$ if you push it over 1.1 bar.
Old 06-13-2013, 06:15 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)