TPS / Window Switches

Schnitz TPS/Window Switch

The 34-TPRS-002-LV Window Switch provides a +12 volt output that is controlled by RPM and/or a 0 to 5 volt signal such as Throttle Position or Gear Position. This unit can be connected to the Gear Position or Throttle Position sensor and/or RPM input to activate a nitrous system. This can be configured to activate a nitrous kit at 8,000 RPM and when the throttle is great than 90%. It will also de-activate the nitrous system when you reach a preset RPM (just before the rev-limiter is recommended). Or, you can choose to activate the system based on gear position. Great for those wanting more consistency or for those who want to wait and have their nitrous kit come on in 2nd or 3rd gear.

The Throttle Position Input has been designed to tolerate a +12 volt input signal. The allows a Typical, Mechanical Nitrous Wide Open Throttle Switch to be used with the RPM Window Switch function. (This is recommended for those who want to set this up for gear position activation)

Voltage chart for 34-TPRS-002-LV: 1.0, 1.5, 2.0, 2.25, 2.5, 2.75, 3.0, 3.25, 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 4.9

The TPRS-002-LV has been designed to work with several different types of engines. There are five different RPM Input options for each of the three RPM ranges:

	1--One input pulse for every two crankshaft revolutions. (Newer Sportbike)
	2--One input pulse for each crankshaft revolution. (typical single and twin cylinder)
	3--Two input pulses for each crankshaft revolution. (typical 4-cylinder operation)
	4--Three input pulses for each crankshaft revolution. (typical 6-cylinder operation)
	5--Four input pulses for each crankshaft revolution. (typical 8-cylinder operation)

The TPRS-002-LV provides three different RPM ranges:

	Low Range - 3,000 RPM to 9,250 RPM in 250 RPM increments
	Mid Range - 6,000 RPM to 12,500 RPM in 250 RPM increments
	High Range - 6,000 RPM to 16,000 RPM in 500 RPM increments

Dimensions 3"x3.5"x1"

Note - The ZX-14 GPS starts with a high volts and decreases with each gear change. The TPS-002-LV can not be connected to the GPS as described above.

Smart Switch
04/10: The 2-8966 switch has been discontinued by MSD. Limited stock remains at MPS.

This is truly a Smart Switch! Not only can you choose between supplying ground or 12 volts to activate a circuit, but you can do it through the use of a long list of vehicles sensors! As long as the sensor is within 0-5 volts DC with a minimum signal difference of 0.5 volt, such as TPS, MAP, MAF, water temperature, oil pressure, boost pressure, etc…the Smart Switch can be used!

Activate a circuit by supplying a ground or a 12 volt source. The switch can be calibrated to ‘learn’ the sensor and it can be programmed to activate at a certain percentage of the sensor’s signal range. Such as activating a nitrous solenoid when the TPS sensor reaches 95% or when the coolant temp sensor reaches a certain level to turn on an electric fan. To assist in setting up the Smart Switch there are two LEDs to alert you when it is in calibration or operation mode.

Part Number	Description	Racer Price
34-TPRS-002-LV	Schnitz TPS/Window Switch	$159.95
2-8966	MSD Smart Switch	$142

All parts sold by MPS are for off road closed course use. They are not intended for use on public streets or highways.

Motorcycle Performance Specialties
380 Orange Lane - Casselberry, Florida 32707
Phone: (321) 972-8282 - Fax: (321) 972-5123
Hours: 9am - 5pm, Monday - Friday
Sales E-Mail: sales@mpsracing.com