So i'm just starting to get my hands into some fabrication work. In the next month i'll start to make my own top mount manifold for my set up. It will be an EF chassis (check my sig). I'm looking for someone who has alot of good experience with this. The turbo i'm running is a Borg Warner S300sx-60 with a divided housing. My main question is with fabbing up the wastegates? Should I set it up to run dual 38mm's or combine the two sections and simply run one larger wastegate? I'm planning on pushing 20-30lbs of boost with my setup. Any help is appreciated! Thanks guys

 

2 gates will control boost much better.. I would 100% recommend using 2 gates..

 

2 gates.

With the proper spring/boost controller setup, 2 gates holds/controls boost amazingly well.