ryan1

yes the arm is adjustable, but i made sure the flapper door completely shut and tight when fully closed.
thanks

rayray01

:P well i dont know know wat d fuc 2 think but i aggree wit 95turbolx something not right if u can lower it not raise it i always think its the wastegate that conrols the psi pressure wit the controlller

ryan1

well i talk to some others about this, they said it has happened before.
(the wastegate flapper door opening cause of exhaust flow and not the actuator pushing it) they said they stock t3 actuator is just to weak and it happens.
so i added a bracket to the wastegate rod with a spring to add tention to the wastegate, and it seems to work fine for now.
with the spring i got now and the acuator vaccum line blocked off im getting 17-18 psi.
i want to get a even tighter spring to get 20+ psi , then hook up my MBC and dial in 15 psi or what ever psi i want.
or maybe i will have to got External WG.
thanks

Slo_crx1

An external is really what you'd want to look into if you want to shoot for over 20psi on your current setup. From all your descriptions it does sound like the wastegate spring on your internal is just too weak to hold it fully closed. I had a worn out dsm wastegate that used to do the same thing. That's the problem with using mbc's with internal gates...once you hit a point where your exhaust pressure is high enough to open that gate a crack, you're pretty much done for. At least with external gates you use the boost pressure not only as a reference for the gate to open, but also to help push back down to reach higher boost levels via your boost controller.