RaceCapturePro Sensors

Sensors

Temperature Sensors
GM-Style
Mfg / Part #	Image	Pigtail	Mechanical	Notes	Analog Channel Configuration
Wells SU109 SMP TX3		Pico 5615pt	3/8" NPT threaded brass body and a 2 pin terminal.	Can be used for air inlet temperature for normally aspirated engine	* Using 2.2K pullup resistor Volts Scaled Value (Degrees F) 0.37 212.00 0.51 178.00 1.99 104.0 2.47 72.0 4.24 23.0
Wells SU107 SMP AX1		Pico 5616pt	3/8" NPT threaded brass body and a 2 pin terminal.	Use for measuring air inlet temperature. Exposed sensing element, necessary for boosted engines where fast response times are necessary. Due to the fragility of the sensing bulb, it is necessary to pot the base of the sensor leads with sensor-safe silicone when used in high vibration environments.
AEM
AEM-30-2012			1/8" NPT Plug set and pins are included with kit	Compact form factor is appealing Specifications Sheet	Using 2.2K pullup resistor Volts Scaled Value (Degrees F) 0.40 302.00 0.87 239.00 1.88 176.0 3.2 122.0 4.72 32.0
Infrared Sensors
Mfg / Part #	Image	Notes
Mylexis MLX90620		16x4 matrix temperature sensor with I2C digital output. The matrix temperature sensor with a 60 degree field of view makes it ideal for a one-sensor tire temperature solution Interface module queued for development Technical Information
Thermocouple Sensors
Analog Devices AD597 Type K Thermocouple amplifier		Low cost, easy to use thermocouple amplifier with 10mv/C temperature output directly from a K-Type thermocouple. Ideal for creating a simple thermocouple to 0-5v sensor. 5v analog interface module queued for development Technical Information
Maxim MAX31851 Thermocouple amplifier		Versatile thermocouple amplifier with 1-wire (I2C) digital interface. Ideal for monitoring multiple sensors Quad thermocouple amplifier to CAN bus bridge queued for development Technical Information
Pressure Sensors
Fluid Pressure
These sensors are appropriate for measuring fluid pressures in an engine. Not appropriate for measuring manifold boost or vacuum as these are relative pressure sensors. Use an absolute pressure sensor instead.
Mfg / Part #	Image	Pigtail	Mechanical	Notes	Analog Channel Configuration
AEM 30-2131-150		3 pin GM connector	1/8" NPT	150 PSI pressure sensor, appropriate for oil and fuel. Linear response with an output between 0.5v and 4.5v Technical Information Default kit from AEM includes pigtail	Since these type of sensors have a linear output, replace the 4.5v value with the max pressure of the device in the units you prefer. e.g. 10 bar, 150 psi, etc. Repeat the value through the rest of the calibration table. Volts Scaled Value (PSI) 0.5 0.0 4.5 150.0 4.5 150.0 4.5 150.0 4.5 150.0
Various		3 pin GM connector	1/8" NPT port	10 bar (145 PSI) stainless steel pressure sensor. Linear response with an output between 0.5v and 4.5v Other sensor ranges are possible - e.g. 10, 30, 150 bar, with a consistent linear output.
Manifold Pressure (MAP) Sensors
Sensor: 12223861 (GM) Pigtail: 15305891 (GM) PT1035 (AC Delco)			Bracket for firewall mounting vacuum port	3 bar MAP sensor	Volts Manifold Pressure (KPa) 0 3.6 1.25 80.0 2.5 159 3.75 237 5.0 315.0
Freescale MXP4250AP				2.5 bar MAP sensor An extremely popular MAP sensor used in the Megajolt ignition and Megasquirt fuel injection systems. Can be used in a simple circuit and powered by the 5v voltage reference from Race Capture
Tire Pressure
Mfg / Part #	Image	Notes
Schrader		OEM TMPS System Schrader TPMS receiver outputs tire pressure data on the CAN bus. would need to reverse engineer CAN bus protocol. Analysis / Reverse engineering work queued
Pulse/Speed/RPM Sensors
RPM
Mfg / Part #	Image	Notes
Autosport Labs CoilX	<image>	The CoilX sensor module is designed to safely interface the noisy, high voltage RPM signal at the ignition coil pack primary into a clean signal that RaceCapture/Pro can process. CoilX Project Information Page
Wheel Speed / Gear speed
Hall effect speed sensors will require an external 1K pull-up resistor, connected to 5v. This can be wired up near the sensor connection for convenience.
Mfg / Part #	Image	Pigtail	Mechanical	Notes	Pulse Channel Configuration
Cherry GS102301	File:Cherry GS102301 gear speed sensor.jpg	Rugged Hall effect sensor suitable for harsh automotive environments (fuels, solvents, lubricants) Operation up to 140c Datasheet			Configure the pulse channel with the number of pulses per revolution, which maps to the number of teeth on the gear / wheel.
Cherry GS100701		Low profile, aluminum body, flying leads Operation up to 125c Datasheet
Distance Sensors
Sharp GP2D12		Optical distance sensor - 10 to 80cm range 3-pin connector, analog output Possible uses include ride height position (pointed at ground) and pedal position Datasheet
Angle / Rotation Sensors
Throttle Position (TPS)
Mfg / Part #	Image	Pigtail	Mechanical	Notes	Analog Channel Configuration
Ford / SMP TH45			Screw mounted, keyed input for throttle shaft	Common Ford style Throttle Position sensor	To calibrate, note the voltage at 0% throttle and 100% throttle and create a 2 point analog scaling map.

Wiring

Temperature Sensor

Temperature sensors are passive devices that measure temperature through the use of a thermistor, a resistor that varies resistance with temperature.

We recommend using a dedicated, two wire ECU-style sensor for best results.

Pullup resistor

A pullup resistor is needed to create the necessary voltage divider circuit so RaceCapture/Pro's analog input can sense temperature as a varying voltage. This pullup resistor is connected to the 5v reference on the RaceCapture/Pro terminal block.

Use a 2.2K ohm pull-up resistor for high resistance ECU style sensors such as:

• GM-style TX3 / SU109 Coolant
• GM-style AX1 / SU107 Air Inlet Temp
• AEM 30-2012 1/8" NPT fluid temperature sensor

Use a 220 ohm pull-up resistor for low resistance gauge type sensors such as:

• VDO 323-095, 325-002

Sensor Ground

Two wire temperature sensors have one sense lead and one ground lead. for best accuracy, connect the ground lead to the same ground point as RaceCapture/Pro.

One wire sensors have the ground as the body of the sensor. Ensure the engine is properly grounded to the chassis via multiple ground straps.

Pressure Sensors

3 Wire Active Sensors

Active pressure sensors are typically powered with 5V and provide a voltage output that varies with the pressure measured. Typically they have a linear response and are very easy to calibrate.

((picture of active sensor))

Sensor Breakout Board

We've created an optional sensor breakout / distribution board that will make it easier to use sensors that require pullup resistors as well as making available multiple ground and 5V Vref connections. The built-in pullup resistors are easily disabled by breaking a designated trace on the board. This board is compact; enough to be bundled inline with your wiring harness.

SensorX

Hardware Expansion board <coming soon> look for it to fit into the RJ-45 jack in the back of the RaceCapture Pro. It can be used to develop your own sensors, or hook in some of the cleverer concepts we've come up with!

Adapter Board <coming soon> look for it to fit into the GPIO pins on the green removable bus in the back of the RaceCapture Pro.