Over Boosting? Need some help guys

[Shane@DBPerformance]

Originally Posted by talonsway

so i removed the arm and took it for a drive, at about 4-5k i was seeing about 20 pounds of boost and at about 6/6.5 almost 30 pounds of boost. So if i am thinking right this means i found the problem, and that is that my waste gate is bad? So start shopping for a big 16g Waste gate actuator?

If I am reading this right and the arm was removed to allow the flapper to open all the way right away, then you have bad boost creep. The fix would be a larger flapper and porting or an external wastegate. Another option is to choke the exhaust or intake system so that the turbo has a hard time making boost, which obviously isn't the best option for power.

well I wanted to hold 15 maybe 20 pounds. So if I could get it to hold around there I would be happy. Might just start saving for a external waste gate set up, just drive it like it is because I can not figure out why this is happen. My friends DSM with his 16g and he only boost like 12 and it holds perfect

Being able to hold 12psi fine with a 16G on a DSM is actually weird and not how they normally act. And what his car is doing does not matter and is not going to fix what yours is doing.

[talonsway]

Originally Posted by Shane@DBPerformance

If I am reading this right and the arm was removed to allow the flapper to open all the way right away, then you have bad boost creep. The fix would be a larger flapper and porting or an external wastegate. Another option is to choke the exhaust or intake system so that the turbo has a hard time making boost, which obviously isn't the best option for power.

Yes you are right i removed the arm, and gave her throttle and at about 6k had about 25 pounds of boost. Im debating on going with a larger flapper, but would like to go with a external wastage set up. But don't really have the money for that. For a proper external waste gate would you go off the manifold or the o2 housing? And i would need to weld that flapper hole shut.