Higher Gears for Turbo Cars

I take it that you’re just running it off the wastegate spring right? What’s the boost control module? MAC valve, dual MAC, bleeder?

Edit to add: Check out this pdf by Holley on boost control. Lots of good info in it, even if you aren't using Holley efi, the concepts should be the same as MegaSquirt.

https://documents.holley.com/199r10628rev2.pdf