Pro Tune PR-4 – ECU

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Pro Tune PR-4 – ECU

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Product Information

Pro Tune PR-4 is an advanced electronic engine management system and data acquisition ECU. It has integrated tools for control of injection and ignition systems up to 4 cylinders in sequential mode, or up to 8 cylinders in semi sequential mode, compatible with most 2 and 4 stroke engines. Available alone, with plug & pins , or with Pro Tune PR-4 Wiring Harness, please select your requirements in the options above when placing your order.


The ECU has standard functions and additional (fully enabled) functions to control modern systems such as variable camshaft control, drive-by-wire throttles and boost control. In addition, it features integrated wideband lambda control, CAN network, and USB communication interface & supports Peak and Hold injectors. Connect-Box expanders adds up to 8 programmable user functions, allowing great versatility and providing the ideal solution for professionals and enthusiasts alike. 



Standard Functions:

  • Dual Boost Control
  • Launch Control
  • Full Throttle Shift
  • Custom CAN
  • Asymmetric Ignition
  • User Programmable Functions
  • Lambda Control
  • Idle Control
  • Emergency Map
  • Continuous Internal Data Logging – 32Mb
  • Anti Lag


Fully Enabled Functions:

  • Traction Control
  • Dual Cam Control
  • Secondary Injector Bench
  • Lambda Learning
  • Dual Lambda Control (external controller required).
  • Peak and Hold
  • Dual ETC Control (external driver required for 2 throttles)



  • 8 user-programmable functions, allowing customisation of to meet specific requirements of each application.
  • Pre-defined protection strategies in events such as oil pressure, fuel pressure, temperature etc.
  • Dual cam control for intake and exhaust VVT, or up to 2 intake camshafts on dual-bank engines, with closed loop control and position target.
  • Compensation strategy in the event of camshaft position sensor synchronisation errors.
  • Dual Electronic Throttle Control (external driver needed for bank 2).
  • Pin-out compatible with PR440, PR660 and PR-8 ECUs, avoiding modifications to existing wiring harnesses.
  • Decimal fuel map, providing 40 times more resolution.
  • Fuel cut map based on TPS or pedal position.
  • Customisable CAN to aid OEM installations, providing up to 16 IDs / 4 channels each.
  • Anti-lag with electronic throttle actuation.
  • Free Air Calibration for Wideband Lambda NTK / Bosch.
  • Asymmetric Ignition for specific applications such as Wankel, Cross Plane and Odd Fire engines.
  • Machined billet aluminium body with fixing bracket.
  • Resettable Engine run time counter.
  • Configuration / calibration via Workbench PRO.



  • Integrated lambda probe controller with high-precision closed loop control for fuel injection adjustment.
  • Dual boost control for engines with two cylinder banks per closed loop. Pressure target with different strategies. Compensation for gear position, speed, auxiliary input, release time and 3D map clamp.
  • Integrated Peak and Hold (low impedance) injector control.
  • Individual trim by cylinder.
  • 3D injection phase map.
  • User defined trigger wheels and multi-tooth strategy for unusual trigger patterns.
  • Multi-tooth phase sensor compatible.
  • Fuel and ignition maps by TPS, MAP or MAF.
  • 3D load compensation map.
  • 3D lambda self-learn map.
  • Fully configurable pedal position vs TPS ratio.
  • Injection and/or ignition soft & hard cut rev-limiter.
  • Over-boost protection.
  • Start/stop button strategy.
  • Traction control with operation strategy for 1 to 4 speed sensors.
  • Compensation and hysteresis for A/C compressor activation.
  • PWM water pump control.
  • Diagnostic channels for crank & phase sensors.
  • Advanced setups for cranking and post-start.
  • Strategy for engine flood clearing.
  • 3D Emergency map.
  • Auxiliary injector rail with smooth activation and automatic calculation of fuel injection.
  • Ability to activate auxiliary injector rail in sequential mode for engine with up to 4 cylinders.
  • Volumetric efficiency calibration using fuel tables and ignition timing in 3D maps.
  • Continuous datalog recording with up to 250 simultaneous channels, up to 50Hz with automatically adjusted frequency by channel.
  • 250 kPa integrated MAP sensor.




  • Compact anodized aluminium chassis.
  • Automotive waterproof connector with 48 pins.
  • 100 MHz Dual-core processor.
  • USB communication.
  • Fixing bracket.
  • Weight: 396g.
  • Dimension: 93 x 126 x 40 mm.



  • 7 to 22 V.
  • Maximum consumption of 20A @ 12 V.



  • Injector outputs: 4
  • Ignition outputs: 4
  • Auxiliary outputs: 4
  • 5V sensors outputs: 1
  • Ground sensors outputs: 1



  • Integrated MAP sensor: 1.
  • Lambda sensor support: 2.
  • Synchronism inputs: up to 3.



  • Specific inputs for: CKP, CMP and Lambda Sensor.
  • Maximum 10 auxiliary inputs.
  • Digital inputs (frequency measurement): 2 of 10.
  • Auxiliary voltage inputs: 8 of 10.
  • Auxiliary temperature inputs: 6 of 10.
  • Digital switches auxiliary inputs: 6 of 10.



  • Serial interface: 1
  • USB interface: 1
  • CAN interface: 1



  • Outputs test.
  • Emergency map.
  • Compensation via Dash Logger.
  • Firmware updates.
  • CKP/CMP reading.
  • Errors verification.
  • Password protection.
  • Internal Data logging:  32Mb (10 channels on 10 Hz – 6 h)/ (10 channels on 1 Hz – 60 h)



The estimated dispatch time is within 2 working days.

Product CodePR4ECU

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