Originally Posted by HDDP
Every sensor MAF MAP IAT KNOCK TP 02 ECT talk to the ECU which is programmed to cut fuel, add fuel, retard timing, advance timing to maintain it's pre-programmed state.
Refering to my Turbododge days... This was true in closed loop (14.7 A/F). But since the narrowband O2 sensor couldn't read and relay the ideal range for WOT A/F (11-12), the PCM resorted to a pre-determined injector pulse calculation relative to Manifold Absolute Pressure (which was sadly replaced by MAF in our Crossfires) so a larger injector resulted in a higher volume of fuel @ WOT (to be taken advantage of by the fairly large snail shaped pinwheel toy hanging off the exhaust manifold).
Now, I have some questions I suspect has not been answered yet. But I'll ask them just in case...
Will the stock crossfire PCM adapt to larger injectors and the introduction of more air?
And what % of additional fuel and/or air can we push (or pull) into an N/A Crossfire before we exceed the stock PCM's adaptive range?
I noticed someone speculating about 20% fuel adapt in the PCM. But does the MAF have 20% of range left?