August 7, 2010
Finally, I have installed my own set of GT28’s. I have additional pictures coming shortly. I have not been able to tune the car because of the weather. I have new Saard style 650cc injectors, Aeromotive FPR, and modified fuel rail. I had issues with oil leaks coming off the new turbo’s supply and drain lines due to defective parts. But all is fixed. I am still having a custom exhaust manifold built which should be near spring 2010. The car feels about 30% stronger over the first set of US Upgrades. I am hoping to get close to 600whp on 101 fuel. I should be able to get close to 30psi with my custom adjustable wastegate spring.
In addition, I have installed a custom circuitry that changes the FP voltage to 16v at 4000rpms. It reads the 9v-12v signal the stock ECU sends to the fuel pump and when it triggers to 12v, it kicks in a secondary voltage supply. This should do the trick as opposed to adding a 2nd fuel pump. Good thing about this is it runs a 9v up to 4000 rpms. So it stays quite. I have noticed this reduces the injector duty cycle by about 7%,
Last new electronic addition is my newly designed “pre-transition” boost controller. It connects to the ECU via MAP wire and intercepts the feed to the EBV VSV. It reads the MAP boost voltage and when it reaches a pre-set level, it closes and allows for prespool. Somewhat of an electronic boost level controller device. Range for pre-transition boost is from stock at around 10psi up to about 1- Bar, or just under 15psi. This is a better method than the manual boost controller, plus the ease of in car adjustment.