LIGUORI DRAG RACING • TECH SUPPORT
FuelTech Inputs Cheat Sheet
Original guide content, diagrams, and calibration values. Original update dates are retained within the guide.
Universal Motorcycle FuelTech 450/500/550/600
Wiring Cheat Sheet
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Last updated 1-1-23
INPUTS:
Inputs:
-White wires are inputs.
-Any input can be digital or analog which means any signal can be on any input wire.
-Digital signals are speed sensors or button/switch activations where signals are either on or off.
-Analog signals are any type of varying voltage signal such as temperature or pressure sensors.
-All 5V and sensor ground wiring can be spliced off the existing singular wire from the ecu connectors. You can splice off into as many wires as you need for your vehicle.
-FT450/500 does not have a sensor ground wire from the ECU connector, you need to use battery ground when using these ECUs for sensors. Only one wire on battery negative spliced out to each sensor is needed.
2 Step-Clutch-Upshift-Nitrous-Scramble-ETC button and switch wiring:
-Any white input wire, make sure the number white wire corresponds with FuelTech inputs. Inputs in software can be changed to match.
-Ground or sensor ground.
(You could use 12V if needed but you must swap the signal in the FuelTech settings.)
FuelTech pressure sensor wiring: Oil/Fuel/Nitrous/Shift/Wastegate/ETC
-These sensors are lettered for pinout. Look at the black part at the top of any FuelTech branded sensor and you will see A, B, and C molded into the plastic housing for the connector.
-If it is not a FuelTech branded sensor, then check with the manufacturer for wiring.
-Wiring the factory connector you must push the wire through the connector, then crimp the pin on and pull the wire back and seat the pin into its location this is called “pull to seat”. If you would like “push to seat” when you can insert the pin through the back please contact Liguori Drag Racing for an upgraded connector.
-Liguori Drag Racing only recommends using pressure sensors from our ECU provider.
A = Sensor Ground
B = 5V
C = Any white input wire, make sure the number white wire corresponds with FuelTech inputs. Inputs in software can be changed to match.
Engine temperature wiring:
-Any white input wire, make sure the number white wire corresponds with FuelTech inputs. Inputs in software can be changed to match. Label “Engine temp.” in FuelTech inputs.
-Sensor ground.
-Factory Suzuki and Kawasaki sensors are not predefined so you must use custom voltages and values.
-Below is what I have used for years.
Air temperature wiring:
-Any white input wire, make sure the number white wire corresponds with FuelTech inputs. Inputs in software can be changed to match. Label “Air temperature” in FuelTech inputs.
-Sensor ground.
-Factory Suzuki and Kawasaki sensors are not predefined so you must use custom voltages and values. Use the same values above from engine temperature for factory air temperature sensors.
Oil temperature wiring:
-Any white input wire, make sure the number white wire corresponds with FuelTech inputs. Inputs in software can be changed to match.
-Sensor ground.
-Set up sensor as SS300 if it is a FuelTech branded sensor, if it is not a FuelTech branded sensor please check with the manufacturer.