Supra MK4 — Stage 3 ECU Tune
- Launch control implementation
- Boost control optimization
- Improved power delivery
- Enhanced torque output
- Drive-by-wire integration
- Wastegate solenoid tuning
This 1995 MK4 Supra came in with a full hardware package: GTX turbo conversion, supporting intercooler, exhaust, and fuel system built to handle E85. The engine's been fitted with upgraded camshafts, ignition coils, high-pressure pump, and larger injectors to suit the ethanol-compatible setup. The Link ECU gave us proper control over the flex fuel tuning.
We mapped it for closed-circuit use with both pump 98 and E85 capability. Final result was 200 kW at the wheels and 284 Nm torque. Power delivery is where you'd expect it with the GTX—responsive midrange, clean pull through to redline.
The flex fuel calibration switches between maps depending on ethanol content, so the customer can run whatever's available without drama. Useful for track weekends where E85 access varies.
What's involved in tuning a 2JZ on flex fuel with a Link ECU?
The Link platform allows proper closed-loop flex fuel control. We build separate ignition and fuel tables for E85 and 98 RON, then the ECU blends between them based on ethanol content sensor data. Requires an ethanol-compatible fuel system and appropriate injector sizing.
Is 200 kW conservative for a GTX-equipped 2JZ at Stage 3?
Yes. The hardware package here supports considerably more, but this calibration prioritises reliability and usable power for competition use. Conservative boost and timing leave headroom for varying fuel quality and track conditions.
Can the car run on pump 98 RON, or is E85 required?
It runs on both. The flex fuel calibration adjusts automatically based on ethanol content, so the customer can fill with anything from straight 98 to E85 and the tune adapts accordingly.
Workshop & Dealer Access
Protunes supplies ECU calibration files exclusively to approved workshops, tuners, and dealers throughout Australia. Platform: Link ECU.
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