Celica GT4 — Stage 2 ECU Tune
- Improved power delivery
- Improved torque response
- Enhanced boost control management
- Optimized fuel system calibration
- Refined engine responsiveness
This ST185 GT4 came in with the classic recipe: GCG turbo, uprated injectors, high-pressure fuel pump, and drive-by-wire integration all calling for proper closed-loop control. Running through the Link ECU, the calibration was built around 1.03 bar peak boost and 98 RON, aimed squarely at circuit work where the AWD drivetrain can make full use of the torque spread.
Final result logged 167 kW at the wheels with 292 Nm. The torque curve stays usable without sacrificing top-end response, and the boost control solenoid setup lets the calibration hold target through the mid-range without the old-school creep these cars used to suffer from. Solid numbers for a street-registered chassis that lives for track days.
Link's flexibility made iterating fuel and timing maps straightforward, particularly with the injector scaling dialled in properly. No drama, just a clean base file for a well-sorted 3SGTE.
What power can I expect from a similar GCG setup on 98 RON?
This car made 167 kW at the wheels running 1.03 bar with upgraded fuel system and a GCG turbo. Expect similar results with equivalent hardware and proper calibration.
Is the drive-by-wire integration reliable on the Link platform?
Yes. The Link ECU handled the DBW integration cleanly in this build, allowing precise throttle mapping and traction management for circuit use.
Is this suitable for street use or track only?
This calibration is developed for off-road and closed-circuit competition use. The torque and boost levels are manageable, but it's tuned with track duty in mind.
Workshop & Dealer Access
Protunes supplies ECU calibration files exclusively to approved workshops, tuners, and dealers throughout Australia. Platform: Link ECU.
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