FuelTech put together a dedicated EFI package for Jr. Dragsters: the FT450 ECU, a wideband O2 conditioner, the engine sensors that matter on a single-cylinder race engine and an unterminated harness so you can wire the car clean. We bundled the whole thing into one part number so nothing gets forgotten when you order.
What's in the package
FT450 ECUThe brain. Fuel, ignition and full datalogging.
FT450/550 A Unterminated Harness, 10 ftWire it to your chassis, your way.
WB-O2 NanoWideband conditioner for real-time AFR.
Nano LSU 4.2 Harness, 6.5 ftConnects the Nano to the O2 sensor.
Bosch LSU 4.2 Wideband O2 SensorThe sensor itself.
FT Injector 85 lb/h GEN 3High impedance, EV1. No driver needed.
Junior Dragster Throttle BodyBillet body, built-in TPS, -6 ORB fuel inlet.
EGT-4 CAN with harnessReads exhaust and head temps over CAN.
Type K EGT Probe, Exposed Tip, 18 inFast-response exhaust gas temperature.
CHT ThermocoupleCylinder head temperature, the air-cooled engine's coolant gauge.
Pressure Sensor PRO, 0-150 psiFuel pressure, with mating plug.
Pressure Sensor PRO, 0-1500 psiBrake pressure, with mating plug.
Davis Driveshaft Sensor DAV-003Driveshaft speed for the datalog.
Why EFI on a Jr. Dragster
- Fuel and timing you can adjust from the laptop instead of chasing jets and needles between rounds.
- Every pass is logged: AFR, EGT, head temp, fuel pressure, brake pressure and driveshaft speed. You see what the engine and the car did, not what you think they did.
- Head temp and EGT on a single cylinder tell you fast when something is going wrong, before it costs you an engine.
- Driveshaft speed and brake pressure in the log help sort out the launch and the stop, not just the engine.
Good to know
- The injector is a FuelTech 85 lb/h GEN 3, high impedance with an EV1 connector. No peak and hold driver needed.
- Driveshaft trigger ring and sensor bracket are not included. The Davis sensor reads a steel trigger ring on the driveshaft.
- The 10 ft main harness is unterminated, so you cut it to length and pin the sensors to your layout. Mating plugs are included for both pressure sensors.