Window switch

SouthArk370Z · 11-16-2014, 11:49 AM

White - Engine RPM input signal. 5-12V pulse. You can use the negative side of one of the coils or the signal from the ECM. See FSM for pinouts.
Red - RPM switch power. Get power from one of the fuse panels and use an on/off switch between the fuse block and the RPM switch. Mount the on/off switch anywhere that is convenient.
Yellow - RPM switch output (NO). Drive a relay with the output and use the relay NO contacts to switch the load (nitrous valve). Run one side of the relay contacts (NO) to the nitrous valve and the other side of the contacts (common) to a fuse and then a power source.
Gray - RPM switch output (NC). Not needed.
Black - RPM switch ground. Run to closest convenient ground.

The micro-switch (NO) is a WOT indicator to enable the relay.

tommyguns · 11-16-2014, 12:02 PM

Quote:

Originally Posted by SouthArk370Z

White - Engine RPM input signal. 5-12V pulse. You can use the negative side of one of the coils or the signal from the ECM. See FSM for pinouts.
Red - RPM switch power. Get power from one of the fuse panels and use an on/off switch between the fuse block and the RPM switch. Mount the on/off switch anywhere that is convenient.
Yellow - RPM switch output (NO). Drive a relay with the output and use the relay NO contacts to switch the load (nitrous valve). Run one side of the relay contacts (NO) to the nitrous valve and the other side of the contacts (common) to a fuse and then a power source.
Gray - RPM switch output (NC). Not needed.
Black - RPM switch ground. Run to closest convenient ground.

The micro-switch (NO) is a WOT indicator to enable the relay.

Holy cow my head is spinning lol. I'm sorry please forgive me for my ignorance when it comes to wiring. So how do I incorporate the Zex NMU? This is for the Edelbrok unit correct?

SouthArk370Z · 11-16-2014, 12:19 PM

Quote:

Originally Posted by tommyguns

Holy cow my head is spinning lol. I'm sorry please forgive me for my ignorance when it comes to wiring. So how do I incorporate the Zex NMU? This is for the Edelbrok unit correct?

The wire from the NO relay contact goes to the white wire of the NMU to tell it you are in the desired RPM band.
The micro-switch says you are at WOT and enables the system.
The fuel pressure switch shuts off the nitrous if you lose fuel pressure.

So, as long as main power switch is on, fuel pressure is high enough, gas pedal is on the floor, and RPM are in the target band, you will spray nitrous. If any of those conditions are not met, nitrous shuts off.

Without a main power switch, you may not be able to cut nitrous if the WOT switch fails closed.
Without a fuel pressure switch, you can continue spraying nitrous when the A/F is lean.
Without a WOT switch, you will spray nitrous whenever RPM are in target range.

tommyguns · 11-16-2014, 12:24 PM

Quote:

Originally Posted by SouthArk370Z

The wire from the NO relay contact goes to the white wire of the NMU to tell it you are in the desired RPM band.
The micro-switch says you are at WOT and enables the system.
The fuel pressure switch shuts off the nitrous if you lose fuel pressure.

So, as long as main power switch is on, fuel pressure is high enough, gas pedal is on the floor, and RPM are in the target band, you will spray nitrous. If any of those conditions are not met, nitrous shuts off.

Without a main power switch, you may not be able to cut nitrous if the WOT switch fails closed.
Without a fuel pressure switch, you can continue spraying nitrous when the A/F is lean.
Without a WOT switch, you will spray nitrous whenever RPM are in target range.

OK cool so far I've got it except for the micro switch, the NMU has a built in TPS. So I don't understand the need for the switch.

11-16-2014, 11:49 AM	#1 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324199	White - Engine RPM input signal. 5-12V pulse. You can use the negative side of one of the coils or the signal from the ECM. See FSM for pinouts. Red - RPM switch power. Get power from one of the fuse panels and use an on/off switch between the fuse block and the RPM switch. Mount the on/off switch anywhere that is convenient. Yellow - RPM switch output (NO). Drive a relay with the output and use the relay NO contacts to switch the load (nitrous valve). Run one side of the relay contacts (NO) to the nitrous valve and the other side of the contacts (common) to a fuse and then a power source. Gray - RPM switch output (NC). Not needed. Black - RPM switch ground. Run to closest convenient ground. The micro-switch (NO) is a WOT indicator to enable the relay. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma Last edited by SouthArk370Z; 11-16-2014 at 11:54 AM.

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