Dont want to burst your bub ble but dont standard engines reach that power anyway, i have a set of 32n1's and are maxing out my injectors to, (400hp)and when the ca was standard ran a 12.1 at 114mph at 247rkw
I think u need bigger injectors and airflows with a proper tune, no offense to archie at mazfix but ive seen some of his tunes, and do not like the result when compared to other people tunes and end results.. Im thinking your car should be able to do alot more i would be looking at the 500hp at the rear wheels with that, should be achieved with more boost and better tune.