RomRaider

The AMV8 uses ford's spanish oak processor. It runs narrowband O2 sensors in closed loop at part throttle up to about 4K RPM. Above that and at WOT it runs in open loop. It runs a nonreturn fuel system by pulse width modulation of the fuel pump in the tank. It uses 2 ford MAF's (3w4a-12b579-ab) in 70mm(OD) housings that feed into one throttle body. It has 4-valve heads at 11.3:1 compression leading out to tube headers. RPM limit is 7300. Size 4.3l.

I have supercharged the car with a Vortech V3. The MAF voltages are modified to match NA running and extra fuel comes from 2 throttle body injectors. The tune is adjusted by a wideband O2 sensor.

My Question is this: If I allow the MAF voltage to get too far above the NA level, the car goes to limp mode with code P2106. It is my understanding that the IPC and equizzer recognize the implausible airflow and cause the fault. Since the car is essentially a Ford product, I thought some ford tuning guys(S197 perhaps) might be able to educate me about how this works? Does the IPC in the PCM check air volume(and thus torque) based on a VE table and a calculation? Does equizzer(on a different chip) have a separate VE table or is it shared? What is the typical way that the aftermarket modifies the Ford S197 PCM to run forced induction and prevent these problems. I realize that this part of the PCM is most critical for safety and is full of redundency but I'd love to safely modify it and use the stock injectors.

p.s. The 2 MAF's measure enough air for at least 700HP and I believe the injectors are almost as good( Maybe 42lb and operating at 55psi)

I know nothing about reprogramming ford based ecus with anything other than commercially available software/hardware.

In situations like yours, I use a voltage clamp to keep MAF voltage within spec. Then an additional injector controller or a RRFPR (which won't do you any good because your pump is controlled by the ecu). However, you could use a circuit to raise fuel pressure as boost comes in.

Seems an additional injector controller with boost referenced timing retard would be the safest way to keep the fuel on her and the timing safe.