Sounds way underpowered. I thought when you had an intercooler ambient temps didn't matter much. I wonder how much total timing you're running.Wow your hp levels sound similar to mine. What turbo kit are you running? What fuel are you using? My car made 420rwhp and 498ftlbs on 11psi 93 Octane. Im using the boost brothers turbo kit and a t67 turbo. DSS 331 stroker, tirckflow heads and cam, and cobra upper and lower. I believe my car should be putting out alot more but my dyno pulls were made in 105+ degree, high humidity weather.