Hi,
I am considering fitting a Kit to my 4.2S/C. I have had experiece with fitting a Kit to a Turbo Charged car.
It lowers inlet temperatures, stops detonation from bad fuel and adds extra fuel delivery when most needed.
With additional tuning there are significant HP and fuel economy gains.
If I go ahead so I can source the correct unit I need to know whether the MAP sensor on a RRS S/C is Voltage or Frequency regulated.
Can someone let me know

Quote:

MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR- SUPERCHARGER INLET PRESSURE
The MAP sensor provides a voltage proportional to the absolute pressure in the supercharger intake. This signal allows the load on
the engine to be calculated and used within the internal calculations of the ECM. The sensor is located below the electric throttle
on the induction elbow.
MAP Pin Out Table
1 MAPsignal
2 Sensor supply
3 Not used
4 Sensor ground
The output signal from the MAP sensor, together with the CKP and IAT sensors, is used by the ECM to calculate the amount of air
induced into the cylinders. This enables the ECM to determine ignition timing and fuel injection duration values.
The MAP sensor receives a 5V supply voltage from pin 48 of ECM connector C0634 and provides an analogue signal to pin 38 of
ECM connector C0634, which relates to the absolute manifold pressure and allows the ECM to calculate engine load. The ECM
provides a ground for the sensor via pin 11 of ECM connector C0634.
If the MAP signal is missing, the ECM will substitute a default manifold pressure reading based on crankshaft speed and throttle
angle. The engine will continue to run with reduced drivability and increased emissions, although this may not be immediately
apparent to the driver. The ECM will store fault codes which can be retrieved using T4.

Thanks for that information.
I have already been in touch with Snow Performance to let them know so they can recommend the best kit to suit.
I will post here progress if anyone is interested.