can i get a chipped p28 ecu for my obd2 gsr and not go and tune it with like crome or sumthing..can i just plug it in the harness and go..all i have is valves and type r pistons...u only have to tune if u got injectors and manifold to figure out the air fuel ratio etc rite???

 

I'd say you could just use the stock ECU and be fine, you're compression is not much higher with the ITR pistons.

Just reset the ECU.