Quote Originally Posted by stndrd View Post
What do you think moves the diaphragm then? All wastegates have springs, just the internally gated set ups have the rod attached to the diaphragm & spring to open up a flap in the rear housing to allow excess air flow through
ah my bad, an yes, that is true.

And on that note, this does explain why u need a boost controller, as it allows/limits the amount of pressure that enters the actuator thus allowing the flap to open/close at certain pressure....

One common problem with internal gated ive ran across was boost spiking, though running a EBC does help alot, for those who run a manual bleed valve its not a pretty sight!