Not sure what you're asking...
Obviously an adjustable wastegate will allow you to tailor the boost level to your needs/octane/tune.
When I first put a Thrasher 92 on my car, it was making 23-24psi in 1st and 2nd and 19-20 in 3rd. Even with 100 octane in the tank, it was a bit too much boost for my liking (and my stock turbo), so I dialed it back to where I was with the RA93 (18-19psi) and eventually decided it ran better with the Red's chip.
Anyway...an AFPR and adjustable wastegate are a necessary tuning tool for these cars...along a Scanmaster or DS, Turbo-link, etc.
S.