Spiking to 17psi is rather risky, spiking to 18-20psi is just Insane and asking for trouble. I have the $50 Hallman controller and have mine spiking at 13psi dropping to 10 or 11psi, well within safe limits and still WAY faster than stock. I went back to stock for about an hour the other day, and it was like the turbo charger wasnt even there, definatly cant live without the boost controller now.
Matt
2003 GT Cruiser
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