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Skyline GTR

AMS was running a ProEFI Pro128 on their record pass!

This GTR is all stock with a Pro128, flex fuel, and exhaust!

ProEFI’s exclusive Torque reduction strategy keeps the power down to managable levels during the shifts to save the transmission and clutches. While other companies ‘trick’ the tcm in to thinking the torque output of the engine is something other than what it is. ProEFI lets the TCM work in stock form allowing the stock shifting times and schedules to perform properly. During all shifts, the ProEFI monitors clutch slip and reduces power ONLY during clutch slip to prevent expensive excessive wear and transmission damage. We all know how expensive these transmissions are to repair, and the ProEFI helps aid in the longevity and performance of these transmissions without sacrificing performance. Proper torque reduction strategies are the key to making these things live! We have tested 100% stock transmissions being thoroughly abused with over 650whp and torque under multiple launches with antilag and boost…they just keep going, it doesn’t bother them. If you get the transmission hot enough to get the clutches to slip, the ProEFI is there to pull power to keep you from burning up the transmission.


ProEFI offers plug and play solutions for Skyline GTR R32, R33, R34 and R35. The Pro128 system gives the user control over the following options

  • Fuel
  • Ignition timing
  • I-Boost Control (5 stages of boost curves that can be selected to be targeted against Vehicle Speed, Time, or Flex Fuel input)
  • Flex Fuel (ability to run any mixture of E85 with the ECU making on the fly adjustments to boost, spark, and fueling based on Ethanol     content).
  • Antilag Boost control – 5 different target boost levels
  • TwoStep Launch Control – 5 different target RPM’s
  • Hi/Low Octane switch – Allows the user to easily change the calibration to run pump gas and race gas settings
  • Nitrous Control – up to 4 stages
  • Control multiple fuel pumps in stages for easier fuel pressure control at lower flow demand
  • Manual transmission Gear position indicators and clutch slip calculations
  • 2 channel Knock control with knock windows and true knock frequency filtering
  • Direct Fire Ignition – No wasted spark!
  • Fuel Pressure Feedback and fault control to monitor proper fuel delivery to prevent engine damage due to fuel system failure
  • Oil Pressure monitoring to alert when low oil pressure conditions occur
  • Radiator Pressure monitoring to warn for excessive coolant pressure in case of a weak head to cylinder block seal, or cracked cylinder.
  • Traction Control – Utilizes the stock wheel speed sensors picked up off of the CAN bus to monitor all 4 wheels. We also use this to help   prevent transmission or clutch damage on the higher horsepower applications that spin the tires.
  • Closed Loop O2 Feedback with Internal Wideband O2 sensors
  • Multiple Fault Management strategies to save the engine and alert the driver incase of sensor failure or tuning errors
  • CAN Display connectivity – 52mm Can Gauge, and 4.5 x 4.5″ CAN display.
  • Meth injection – ability to control methanol injection and tune appropriately for it

(R34 Skyline Harness)