waste gate
01-14-2008, 12:23 AM
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waste gate
i got a 96 12 valve with 90 horse injectos, straight pipe, 125 horse fuel plate, and i get just over 40 pounds of boost. i don't know anything about the waste gate, and was wondering how to make not so much boost
01-14-2008, 10:08 AM
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Reconnect the hose from the wastegate to the hose from the intake manifold to AFC housing - Boost pressure opens the WG at ~18psi - if the WG diaphragm is ruptured, the spring-loaded actuator will hold the WG closed to ~35-40psi
For controllable Boost, get a small cheap adjustble air pressure regulator, install it in the line so you can manually set whatever Boost you desire
The WG diaphragm may be tested with one of those hand-operated coolant system tester pumps or adjustable shop air set for ~40-45psi
For controllable Boost, get a small cheap adjustble air pressure regulator, install it in the line so you can manually set whatever Boost you desire
The WG diaphragm may be tested with one of those hand-operated coolant system tester pumps or adjustable shop air set for ~40-45psi
01-15-2008, 09:31 AM
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Not specifically, but many pics on the forum - look at your turbo, where you'll see the wastegate can with a small rubber hose attached
- on some models the hose may be connected directly from the wg can to an elbow on the aluminum compressor housing
- on other models the hose will be connected to a steel tube - follow that tube under the valve cover cover to the intake manifold side where it is connected with a short piece of hose to a "T" with two other hoses
- the hose on the front side of the "T" goes toward the front to an elbow on the side of the intake manifold
- the hose on the rear side of the "T" goes to an elbow on the AFC housing
That must all be connected so Boost pressure can limit Boost to ~18psi - some guys put a ball bearing in the hose to the wastegate to block pressure - some replace the "T" with a straight coupling to the AFC - some replace the "Teed" hoses with a straight piece of hose - all to get max fuel with max Boost
Again, you will need to test the diaphragm in the wg can to see if it is ruptured, which is the main failure - this will cause a no-power problem unless the line is blocked-off, which will then cause the max Boost conditon
The adjustable regulator will go in the line to the wg can
- on some models the hose may be connected directly from the wg can to an elbow on the aluminum compressor housing
- on other models the hose will be connected to a steel tube - follow that tube under the valve cover cover to the intake manifold side where it is connected with a short piece of hose to a "T" with two other hoses
- the hose on the front side of the "T" goes toward the front to an elbow on the side of the intake manifold
- the hose on the rear side of the "T" goes to an elbow on the AFC housing
That must all be connected so Boost pressure can limit Boost to ~18psi - some guys put a ball bearing in the hose to the wastegate to block pressure - some replace the "T" with a straight coupling to the AFC - some replace the "Teed" hoses with a straight piece of hose - all to get max fuel with max Boost
Again, you will need to test the diaphragm in the wg can to see if it is ruptured, which is the main failure - this will cause a no-power problem unless the line is blocked-off, which will then cause the max Boost conditon
The adjustable regulator will go in the line to the wg can
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