Regarding JMW300ZX's question of pushing 20 PSI out of Sport 500's on pump fuel alone, the answer is no! The car was tuned at Specialty Z to run ~ 20 PSI on 91 pump gas and water/methanol injection (Boost Juice). If you would like to see the dyno charts, go to the Specialty Z website and click on "Blog" at the top of the page. My car is the first vehicle displayed (cherry red pearl). With regard to cutting power from the HKS boost controller, I have done that, but the boost doesn't go down to ~12 PSI (waste gate spring pressure). It stays right where I set it. I'm sure the Safe Inject is working as I have an LED which illuminates when the Safe Inject detects low flow from the pump.
