05 srt 4 cannot adjust boost

dacheese · Post by **dacheese** » Mon May 03, 2010 10:09 pm

Hello,
I have been messing around with the predator for a few weeks now. The problem I am running into is adjusting the boost levels. No matter what % I adjust the boost I get 15 psi. I am using the stock waste gate on PCM control. Mods are 3 inch catback, 3 inch 02 housing, 180 t stat, AGP CAI.

Dimarini · Post by **Dimarini** » Tue May 04, 2010 8:48 am

I think you may be reaching the limit of the stock wastegate actuator. It's spring is just too weak. You may have to go to a stage II WGA it has a stronger spring and should let you hold more boost.

gizmodo · Post by **gizmodo** » Tue May 04, 2010 9:21 am

Where are you seeing 15 pounds, at redline? If so I wouldn't worry. The little turbo runs out of steam. It should spike about 20 and fade to around 15 at redline. It has nothing to do with the WGA.

dacheese · Post by **dacheese** » Tue May 04, 2010 10:22 am

Going through the forums my understanding is that the best WGA to use is the stock one. I am holding 15 pounds at every rpm range, not just at redline. I do have a AGP wga sitting in the garage. Would it be best to put it back on and get a rescale? If so after running a rescale would I run the AGP on or off PCM control?

gizmodo · Post by **gizmodo** » Tue May 04, 2010 10:27 am

Sell the AGP WGA and just run the stock one. Have you checked the car for boost leaks?