uaEFI Ultra Affordable EFI

from US$275.00

uaEFI is a lot of ECU for not a lot of money!

The engine computer for your race car: it controls fuel and spark on a 1–6 cylinder gasoline engine, and you wire and tune it yourself.

  • Sequential fuel and spark for up to 6 cylinders, port injection

  • Wideband controller, knock input and drive-by-wire on the board

  • Fully assembled; SD card logging, CAN, USB

Options

  • PRO memory, +$24: additional Lua memory, second CAN, knock spectrogram. Most builds do not need it.

  • Orange enclosure, +$50

  • Crimp kit with mating plugs and terminals, +$40

  • Pigtails and wideband cable, +$100

Order 3, we ship 4. Ships from New Jersey, USA, usually within 5 business days.

Docs and support. Manual, pinout and firmware: wiki.rusefi.com/uaEFI. Help comes from the community: forum, Discord, Facebook group. One-on-one help is sold separately as Technical Support.

uaEFI is a lot of ECU for not a lot of money!

The engine computer for your race car: it controls fuel and spark on a 1–6 cylinder gasoline engine, and you wire and tune it yourself.

  • Sequential fuel and spark for up to 6 cylinders, port injection

  • Wideband controller, knock input and drive-by-wire on the board

  • Fully assembled; SD card logging, CAN, USB

Options

  • PRO memory, +$24: additional Lua memory, second CAN, knock spectrogram. Most builds do not need it.

  • Orange enclosure, +$50

  • Crimp kit with mating plugs and terminals, +$40

  • Pigtails and wideband cable, +$100

Order 3, we ship 4. Ships from New Jersey, USA, usually within 5 business days.

Docs and support. Manual, pinout and firmware: wiki.rusefi.com/uaEFI. Help comes from the community: forum, Discord, Facebook group. One-on-one help is sold separately as Technical Support.

extra memory:
Enclosure:
uaEFI board:
mating harness side:

uaEFI specifications

Engine
EnginesSequential fuel and spark for up to 6 cylinders, port injection, gasoline
Ignition6 sequential outputs, 5 V logic (smart coils); solder-on igniters for dumb coils
Motor drivers2 H-bridges, 6 A: dual electronic throttle, stepper idle or electronic wastegate control
Sensors and inputs
WidebandBosch LSU 4.9 controller on board, 1 channel; sensor not included
Knock1 input
MAPNot fitted: solder-on option or external sensor
BaroDigital, on board
Flex fuel1 input
Trigger inputs2 VR, 3 Hall
Analog inputs9 + 2
Communication and logging
LoggingSD card
CommsCAN (second CAN solder-on; fitted on PRO), USB
Connectors5 × Molex Mini-Fit Jr., 68 pins. Harness not included: pick a harness option, or build your own (crimp tool needed)
Board and software
Board100 × 100 mm, 4-layer
Lua scriptsStandard Lua memory; PRO: additional Lua memory
SoftwarerusEFI updater or TunerStudio (license recommended)
EnclosureOptional, orange, +$50
Full pinout: https://rusefi.com/docs/pinouts/hellen/uaefi/ and manual: wiki.rusefi.com/uaEFI