I am starting getting my hotside together on my (re)-build. My set up is 10.3:1 forged 370 with a PT88 with a KB racing log and crossover. I have the one 38mm waste gate that came with my kit and thinking that it won't handle the new turbo. I am wanting to just add another 38mm instead of spending 450+ on a 60mm gate. Just wanting to know if this a good way to go. Seem like more surface area the better. Let me know.
Mark

 

I would try what you have first,,
I have a T-6 91 MM, running a single 38mm... No problems so far
You would need a large waste gate if you want to run really low bost with a large turbo.

 

your gate is controlling it no problem right now I am only gonna run 12psi right now, No boost controller.

 

13 psi no problem

 

If you're running under 10 pounds of boost, you might see creep in the higher RPMs. The more boost you run, the less exhaust the WG has to flow. As Kyle always says, if the WG is too small, turn up your boost.

For the record, 60mm > 2x38mm

 

not sure how relavent it is but my 50mm gate will hold my pt88 at 6lbs without trouble