Sweet man! Well Welcome to TRS!
Anyways As to your question on the internal wastegate..... The internal has a 12psi spring in it. It is not adjustable. I only want to run between 5-7 psi
A boost controller wont work because they are made if I want to run more than 12psi in my case. Nothing will open it before 12psi. The external wastegate I got is adjustable from 4-9psi. I will keep the internal on which will always stay shut and as a fail safe I will connect it with the external just in case the external fails and wont blow my engine.
About the scavenge pump. My turbo is water cooled (which im not goin to use for now) and oil lubed for the floater bearings. I am doing this whole build keeping in mind that I might want to take it off (I hope not lol). So I don't want to make anything permanent. I am tapping into the Oil Pressure sensor to send the oil to the turbo. BUT im dumping the oil back into the engine by the oil fill tube which is much higher than where it is coming from so the scavenge pump is there to push it up into the oil fill. Usually you tap the oil pan or a little above the oil pan on the block to send it back.....