Chaser — Stage 3 ECU Tune
- 120% power increase to 387kW on E85
- 45% torque increase to 321Nm
- Improved boost control and solenoid tuning
- Enhanced fuel injection mapping
- Drive-by-wire optimization
- Wastegate control refinement
This JZX100 came in for a full Stage 3 build centered around E85 conversion and the headroom that fuel affords. The brief was straightforward: reliable power for closed-circuit use, with the fuelling and cooling capacity to back it. We worked with a Garrett G30-900 turbo, uprated cams, and a front-mount intercooler to get the most from the platform.
The Link ECU gave us the flexibility to tune fuel and timing properly for E85, and the result was 387 kW at the wheels—a gain of 211 kW over stock. Torque came in at 321 Nm as recorded by the workshop dyno. The OS Giken twin-plate clutch and upgraded fuel system were mandatory at this output, and the package holds together cleanly under load.
This is a solid reference point for anyone building a 1JZ on E85 with comparable hardware.
Why E85 for this build instead of 98?
E85 offers better knock resistance and higher effective octane, which let us run more aggressive timing and boost on the G30 turbo. It also runs cooler under load, critical for a full street-to-circuit build at this power level.
Is 387 kW reliable for a 1JZ on this setup?
With the supporting hardware in place—uprated fuel system, intercooler, twin-plate clutch, and proper tuning on the Link ECU—this output is achievable and repeatable for competition use. The bottom end and fuelling are the limiting factors on longevity.
Can this file be adapted to a similar 1JZ with different cams or turbo?
No. This calibration is specific to the G30-900, HKS cam spec, and E85 fuel map. Different hardware requires a fresh base tune and dyno validation.
Workshop & Dealer Access
Protunes supplies ECU calibration files exclusively to approved workshops, tuners, and dealers throughout Australia. Platform: Link ECU.
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