The Sport 500s at 10psi feel somewhat equivalent ot stock turbos at about 14psi. Its nice =)
You will only be able to run about 10psi sefely on the Sport 500s. This requres modifying the solenoids that control the waste gates, they will open the wastegates at about 12psi in its original configuration. 12psi is a bit too much for stock fuel injectors.