Originally Posted by MMZ_TimeLord
That's WOT at near redline... not just WOT guys... please keep in mind that the duty cycle gets closer to maximized as the RPMs climb.
Also, if the PCM is only in closed-loop mode during 'cruise' mode, then the idea of putting even slightly larger injectors should yield a performance boost. I do agree with YellowBee that the best idea is to add something like the MegaSquirt system where it intercepts the stock pulses and modifies them without the PCM knowing about it and alter the O2 sensor data slightly.
OK - but all your saying if full power is only made at WOT and with revs which isn't really news! My point was simply to get 215 hp (engine) you need to flow enough fuel that the injectors are at 100% duty cycle, that implies that without a change to injectors or fuel pressure (which is already quite high) you are stuck at 215 hp.
New exhausts air boxes and the rest can't improve the amount of power for fuel burnt (brake specific consumption) they can only allow more air to flow - which needs more fuel.
Megasquirt is a fun bit of kit but I don't like piggy back systems and the "cleverness" of the factory ECU means you are likely to throw faults up when the AF deviates to an increased richness etc.