Evo 8 — Stage 2 ECU Tune
- 45% power increase to 186kW
- 33% torque increase to 333Nm
- Improved fuel efficiency
- Enhanced boost control precision
- Optimized fuel system management
- Drive-by-wire integration
This 4G63-powered Evo 8 came in for a proper flex fuel setup on the Link platform, built for closed-circuit competition. Workshop supplied a larger turbo, high-pressure fuel pump, upgraded injectors, boost solenoids, and a wastegate to handle the extra fuel capacity and cylinder pressure.
We mapped for both 98 RON and E85, giving the driver the option to run pump fuel during street driving or dial up the ethanol content on track. Peak output landed at 243 kW at the wheels with 438 Nm of torque, running 1.38 bar of boost. Factory baseline was 128 kW, so we're looking at a 115 kW gain.
The flex fuel table transitions smoothly between fuel types, and the Link ECU handles real-time ethanol content sensing without drama. Boost control is stable, and we've kept ignition timing conservative enough to protect the bottom end under sustained load.
Does the flex fuel setup require switching between different maps?
No. The Link ECU monitors ethanol content in real time and adjusts fuelling and ignition automatically as fuel blend changes. The driver can fill with anything from straight 98 RON to E85 without manually selecting a different tune.
What's the power difference between 98 RON and E85 on this setup?
We haven't listed specific per-fuel figures for this build, but E85 will always produce more power due to higher octane rating and charge cooling. The 243 kW figure represents peak output on the preferred fuel.
Is 1.38 bar safe on a stock 4G63 bottom end?
That depends on how hard it's driven and how well the tune manages heat and detonation. This build is intended for closed-circuit use, and we'd recommend verifying bottom-end condition and considering forged internals if sustained high-load use is planned.
Workshop & Dealer Access
Protunes supplies ECU calibration files exclusively to approved workshops, tuners, and dealers throughout Australia. Platform: Link ECU.
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