The Nismo ecu rom file is Different, It is a totally different tune all together,load axes are different and there is not as many timing table as the non Nismo Ecu.
So far this ecu is not responding the same way as other have. Also the knock threshold is lower on this ecu sense they are running a lot more aggressive timming then the other roms in the factory timing tables .
The car is making very good power @ 7psi, Told Jeremy with 12 psi i Can get him 600 RWHP but he said NO So i stopped @ 518 RWHP
The car is monster on the road, we have a cool video coming up here shortly .stay tuned
Here is a before and after Graph
Sam