Is there a compressor map for this charger?
Running "too big" (is there such a thing?) a charger means you need watch out for compressor stall, "surging". Just a few seconds worth can destroy the charger. On the map, there is a surge line, and if you try to operate to the left of the line, you have big problem. It's not subtle, you'll know it when it happens. It usually rears it's ugly head just as the boost starts to climb. You'll feel the vibration and the sound will change dramatically, you need to downshift ASAP.
As long as your racing RPM range is all to the right of the line, no problem you can't drive around. But if you grab the next gear, and it surges as the RPM falls into the next gear, it will be hard to accelerate.
BOV's have uses, but peak boost control should be left to wastegates. Sure it will work, but you will run higher turbo wheel RPM, and you are wasting HP. Your drive pressure stays up and doesn't drop like a wastegate will. BOV's can be used to kill surging on shifting, aka "turbo bark", but won't stop surging at WOT at the low end of your RPM, only a different turbo setup or shot of nitrous will fix it.
I've learned what I know about turbos through trial and error using 19 different turbos (heavy on the error), but then again, it's a large displacement diesel engine, not a DOHC race engine. I'm never under 30psi, and I use big, mostly ungated chargers. So take what I post with a grain of salt, this is the interwebbythingy after all.
