Racepak USM and Accessories

 

USM 4 Sensor Input Module Up to four sensors can be connected to the USM Terminal strip design provides ability to route sensor cable from sensor to USM, cut to length and connect Multiple USM modules may be utilized. For example, an IQ3 provides 32 inputs. 8 USM X 4 inputs each = 32 inputs Sensor cables available with factory installed mating sensor connectors for Racepak sensors Each sensor input can be programmed as shown below. Calibration and scaling values for the listed temperature and pressure sensors are pre-loaded, in the Racepak software. Customer supplied sensors may be also utilized.

Install Pics

230-VM-USM

USM  module

$329

 

Channel 1	Channel 2	Channel 3	Channel 4
0-5V Sensor Output	0-5V Sensor Output	0-5V Sensor Output	0-5V Sensor Output
Racepak Coolant Temp	Racepak Coolant Temp	Racepak Coolant Temp	Racepak Coolant Temp
GM Air/Coolant Temp	GM Air/Coolant Temp	GM Air/Coolant Temp	GM Air/Coolant Temp
Square Wave RPM	Square Wave RPM	Square Wave RPM	No Square Wave RPM
Voltage Event	Voltage Event	Voltage Event	Voltage Event
Ground Event	Ground Event	Ground Event	Ground Event

USM Cables

680-CA-P144

Racepak 144" cable with Packard end (for RP pressure sensors)

$60

Weight     1 lbs

680-CA-A144

Racepak 144" cable with RP temp sensor end (EFI type connector)

$60

Weight     1 lbs

680-CA-M144

Racepak 144" cable with molex 3-pin connector (for speed sensors, shock travel, and MSI pressure sensors

$60

Weight     1 lbs

680-CA-M2P144

Racepak 144" cable with molex 2-pin connector (for some speed sensors

$48

Weight     1 lbs

 

Racepak 3 Wire Pressure / Throttle / Travel Sensor +5V: is power to sensor – typically red wire Ground: is ground to sensor – typically black wire Signal: is signal from sensor – typically clear or white wire Racepak 2 Wire Temperature Sensor Ground: typically black wire Signal: is signal from sensor – typically clear or white wire Racepak 3 Wire RPM (hall effect) / Ride Height +12V: is power to sensor – typically red wire Ground: is ground to sensor – typically black wire Signal: is signal from sensor – typically clear or white wire Brake Switch Records voltage when brake pedal is pressed. Voltage Event or a Ground Event is available for programming purposes. Single wire can be connected from non powered side of brake light switch to Signal input on USM. When brake is applied, signal is recorded in data. Generic 2 Wire Temperature Sensors Consult manufacturer for pin out specifics. It will be necessary to obtain resistance value of sensor. USM software provides ability to calculate 32 resistance values and insert resistor value into channel programming. Fuel Level To simplify, we convert Ohms reading to volts. To do so, the 499 resistor is selected along with 0-5 V sensor type (in channel programming) Fuel tank is filled and voltage noted. Fuel tank is emptied and voltage noted. These two values are then used for two calibration points. Signal is input from fuel level sender Throttle Position from factory ECU Typically a 0-5V signal from the ECU. Customer will need to locate the signal wire in ECU harness and input into Signal of input of USM. Two calibration values are entered into software. 0v=0 and 5v=100 at WOT is example calibration. ECU Temps & Pressures from factory ECU Typically not recommended. “Sharing” resistance based sensor data can affect information transmitted to ECU, which alters vehicle performance.

 USM Installation pictures