External wastegate vacuum

[Mieran]

Lets say you had an external wastegate with 10psi spring and thats the amount of boost you want to run.

Do you put a vacuum hose straight from turbo housing to the wastegate or do you still need to run some sort of boost controller (mbc)?

[Rs1]

Run the vac line only for spring rate pressure.

[Mieran]

There is 2 vacuum nipples on the wastegate which one is used? Or do you link them up via t-piece and connect other end to turbo housing?

[Frisco]

Connect to the bottom one only (closest to the manifold)

[K20tub]

You only need to connect the vac pipe to the bottom of the wastegate .. If you use a electronic boost controller or a ecu controlled boost solenoid then you connect to both ports on the wastegate