Forester XT — Stage 1 ECU Tune
- Improved fuel efficiency
- Improved power delivery
- Improved torque output
- Enhanced boost control
- Optimized fuel injection mapping
The EJ25 in the SH-generation Forester XT responds well to recalibration on 98 RON, especially when paired with a catback exhaust to help the factory turbo breathe. This Stage 1 tune lifts output from 111 kW to 130 kW at the wheels, but the real story is torque: 305 Nm to 405 Nm, which makes a tangible difference for highway overtaking and loaded driving.
The factory ECU retains all OEM safeties and drivability, so the tune suits daily use and touring without the complexity of aftermarket management. Throttle response sharpens up, and the midrange feels substantially more willing without asking anything dramatic of the aging EJ platform.
A practical step up for workshops with customers chasing usable gains on a budget, no hardware surgery required.
Does this tune require any supporting modifications beyond the catback?
No. This is a true Stage 1 software-only calibration on the factory ECU. The catback exhaust helps the turbo expel gases more freely, but no intake, intercooler, or fuel system changes are needed.
How does the torque gain affect drivability on the EJ25?
The jump from 305 Nm to 405 Nm fills out the midrange noticeably. It's particularly useful for highway merging and laden driving, though the EJ25 is still an older design and should be monitored for oil consumption and head gasket health.
Is this safe on 98 RON year-round in Australian conditions?
Yes. The tune is calibrated for consistent 98 RON pump fuel and retains factory knock control and safeties, so it handles summer heat and varying fuel quality without issue.
Workshop & Dealer Access
Protunes supplies ECU calibration files exclusively to approved workshops, tuners, and dealers throughout Australia. Platform: Factory.
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