The Greddy boost control solenoid does a global wastegate cycle as compared to doing individual RPM cells in. That is the issue I am seeing with the Greddy
It can surely be tuned, but it's cheaper and easier to just use the EFR supplied solenoid and have the ECU do all the work. In addition, the ECU will 9 times out of 10 be faster at controlling wastegate duty cycle
Also, if you want to compare apples to apples, compare the GTX2867R to the EFR 6758.
Crazy numbers out of that GTX though. The power of E85
