Originally Posted by catm3
After 6K, the engine starts to fall off. Interestingly, their peak torque is somewhere around 5K. 5K is where the HP peaks and stays at peak till 6K. My guess is that max boost hit 16psi at around that 5K RPM range, then drops off quickly to 6K.
After I'd upgraded my old '93 RX-7 (twin turbo) ignition system, its dyno results (310whp @ 9.5PSI) showed a noticeably extended power band compared to similarly modified car w/ stock ignition. The theory provided was that more boost needs more spark. Not sure if any of that translates to the N54.