Setting preload on wastegate

[DSM 2G Brendon]

My car is currently is running 12psi on a internal wastegate the previous owner has it set at 12psi I wanna turn down the boost to around 8psi. I was reading up on this and I see that you adjust the end link of the actuator arm. I also read something about preload .. Do I have to preload the wastegate again when I'm turning down the boost? Or do I just turn it "x" amount of times ??

 

[GRAVEDIGGER]

You cannot run lower than your spring pressure... Period. Why exactly do you want to lower the boost down to 8psi??? Preload refers to how much pressure is put on the wastegate flapper door to keep it in the normally closed position. It is recommended that you don't have too much preload adjustment, because then you can run out of overall travel on the actuator rod, thereby not allowing the wastegate to fully open which can lead to overboosting.

See here for more info... http://www.dsmtuners.com/forums/tur...djustment-proper-tightness.html#post151563105

 

[Breezio69]

12 psi is the stock boost level. You can't set a factory wastegate to x amount of pressure, you have to swap the entire wastegate unit and arm. That's why they make boost controllers to turn the boost up, it will do nothing to turn boost down below the wastegates preset spring pressure.

 

[DSM 2G Brendon]

Okay thanks well I kind of figured out that I can't because I have a aftermarket internal wastegate ... It has a nipple for a boost controller on it... And I want to set it lower because my car cuts out at 12psi...

 

[Rock2610d]

You should be able to lower the boost pressure......

Factory WG systems have what is called a "boost pill" or orifice in the vacuum line going from the compressor housing to the "t" fitting prior to WG.

If you do not have one I really do not know how you are getting 12 psi. Unless you have a boost controller or aftermarket aculator.

Remove that boost pill and boost will decrease to about 9 - 10 psi.

see:http://www.dsmtuners.com/forums/newbie-forum/468315-unknown-parts-falling-out-turbo-line.html

 

[donniekak]

Run a vacuum line straight from a vacuum/boost source to the nipple on the wastegate actuator.

 

[DSM 2G Brendon]

I have a aftermarket actuator . And there is a vacuum line ran now from the nipple to the intercooler piping by the blow off valve

 

[donniekak]

I have a aftermarket actuator . And there is a vacuum line ran now from the nipple to the intercooler piping by the blow off valve

Take a picture of the actuator, and post it.

 

[crimsondragon]

Take the lead out of your foot and you'll run less boost.

 

[GRAVEDIGGER]

And I want to set it lower because my car cuts out at 12psi...

If your car cuts out at 12psi there is a problem somewhere else.