You need boost by gear. And it's not difficult on these setups. I'm doing the same thing.

You need a wastegate. With a 38-91 I do a tial 38-44. And you need a hondata boost solenoid. Weld the wastegate flange to the intercooler piping and hook it to the boost solenoid and to kpro. Essentially what it does it release excess boost pressure to give you our target psi goal. Hope this helps. If not you can find all this info in this very long thread.

http://www.k20a.org/forum/showthread.php?t=86410

Tapatalk FTMFW!