Subaru Specialist Calibration
Data-driven engine management for Subaru boxer engines — EJ, FA and FB, and nothing else. Dyno and road tuned. Every recommendation grounded in log files and long-term reliability.
ChilliTuned exists to deliver reliable Subaru performance through evidence, data and honest workmanship.
We tune every vehicle as a complete system — not a collection of parts — prioritising reliability, safety margin and drivability alongside power. Every calibration is built for that vehicle alone, backed by data logging and diagnostics, and leaves our workshop unlocked, with a cost-free follow-up included.
We do the job properly the first time, explain the "why" behind every decision, and never sell a modification a vehicle doesn't need.
Because the fastest car is the one that consistently finishes the journey.
01 / The Calibration Standard
Subaru engines aren't like inline-fours. They require mechanical empathy, precise knock-threshold parsing, and strategic fueling to prevent common failure modes.
We test compression, smoke-test intake tracts, and verify fuel pressure before the car ever sees load.
We do not send baseline maps over email. Every calibration is built uniquely on the road or dyno under real physical loads.
Flawless implementation using industry-leading engineering software suites including EcuTek, Cobb, and Haltech.
We trace fuel delivery, ignition timing, and feedback knock parameters using elite high-frequency logging equipment.
ChilliTuned Performance Garage is a Subaru specialist tuning and diagnostics workshop based in Gunalda, Queensland — founded by brothers James and Toby Smith, and built on a single operating principle: first-time quality, no reworks.
We started ChilliTuned after seeing too many vehicles come out of otherwise reputable shops with rushed calibrations, long wait times, inflated bills — and in the worst cases, premature engine failure. There was a clear gap for tuning work that was skilled, transparent and honestly priced. So we filled it.
ChilliTuned works exclusively on Subaru boxer platforms — EJ, FA and FB engines across the WRX, STI, Forester XT, Liberty GT and naturally aspirated models. Focusing on one manufacturer's engine families means we know their failure modes, their safe limits and their upgrade paths in depth, rather than knowing a little about everything.
James handles calibration and diagnostics. What began as curiosity — making his own cars faster and more compatible with a wider range of modifications — developed into professional proficiency across Haltech, AEM, Link and Emtron platforms, refined under the mentorship of a prominent US pro-tuner. Toby is the engine builder, and his craftsmanship underpins every mechanical job that comes through the door. Both draw on a lifetime of automotive experience learned at their father's side — complementary skillsets that let us solve problems other workshops send away.
We don't tune remotely. A safe, reliable calibration requires the vehicle on hand, live data in front of us, and the ability to verify every change — that's a safety decision, not a convenience one.
We confirm faults through fault codes, live data and physical inspection before recommending repairs. We don't replace components on guesswork.
No two cars are the same — modified cars least of all — so every calibration is built for that specific vehicle, and leaves unlocked and unobfuscated. No lock-outs, no hostage files.
Every tune includes a cost-free follow-up. If it needs refinement, we refine it.
We serve Subaru owners across Gunalda, Gympie, Maryborough, Hervey Bay, the Sunshine Coast and Brisbane — by appointment.
02 / What We Do
Every service grounded in evidence, log files and long-term reliability. We explain the why behind every recommendation.
Fuel, ignition and AVCS calibration across the full RPM range on the dyno. Mapped to your hardware, your fuel and your driving.
Throttle response, closed-loop fuel trims and cold-start refinement, dialled in under real load — never remote.
Ethanol-content-aware calibration with supporting modifications matched to your blend ratio.
Compression, smoke and fuel-pressure checks to catch boost leaks and mechanical issues before the car sees load.
Diagnostic confirmation for knock events, fuel-trim drift, AVCS faults and recurring DTCs. Evidence-based, not guesswork.
Routine and performance servicing for EJ, FA and FB platforms. Same workshop, same standards, same data trail.
ChilliTuned calibrates both standalone aftermarket engine management and factory Subaru ECUs. Every platform listed here is one we work with hands-on, in person — live data in front of us, and the tune verified before the car leaves.
We deliberately favour open, transparent tuning platforms. Where the factory ECU can do the job, we tune it — no locked ecosystems, no proprietary hardware you don't need, no ongoing licence fees baked into your bill. Every calibration is unique to the vehicle it's built for — no two cars are the same, and modified cars least of all — and every tune leaves our workshop unlocked and unobfuscated.
Full custom calibration, on-site first-start support and base map generation for engine swaps, built motors and motorsport applications.
Elite and Nexus series. Full setup and calibration including sensor configuration, fueling strategy, boost control and knock control — plus auditing and remediation of incomplete installs from other shops.
G4X and G4+ wire-in and Subaru plug-in units (WRXLink). ViPEC units — the previous generation of Link's engine management — are fully supported. Anti-lag, launch control, flat-foot shifting and flex fuel on supported hardware.
Infinity series engine management. Custom calibration and data logging.
Among the most powerful — and most demanding — engine management platforms on the market. Emtron's depth of configuration is where many tuners come unstuck; we've done the hard yards on it so your calibration benefits from that capability instead of fighting it.
Road-based and dyno (dry hire) tuning available for all major ECU types.
Custom tuning on the standard Subaru ECU — often the smartest path. No standalone required, no expensive handheld hardware as a ticket to entry.
Enhanced, community-developed ROMs unlock capability well beyond the stock calibration:
Open source support now extends through to the current-generation VB WRX (FA24, up to MY25) — meaning even the newest platform can be tuned without proprietary hardware or licence fees.
Enhanced factory-ECU tuning for cable-throttle, 16-bit GD WRX models. Unlocks Group N features on the stock ECU: launch control, flat-foot shifting, anti-lag, flex fuel support and real-time knock control.
Modern tuning platform for the early-generation turbo models most shops won't touch. Full custom calibration for MY99/00 GT Forester and GC8 WRX on the EJ platform.
Already own an Accessport? We provide custom calibration for Accessport-equipped WRX, STI, Forester XT and Liberty GT models, tuned in affiliation with a COBB Pro-Tuner. If you don't own one, ask us first — in many cases an open source tune delivers the same result without the $1,200–$1,500 hardware cost.
| Era | Models | Platform Options |
|---|---|---|
| MY99–00 | GC8 WRX, GT Forester | Project Lambda, standalone |
| MY01–04 | GD WRX (16-bit, cable throttle) | Carberry ROM, standalone |
| MY05–07 | GD WRX/STI (32-bit) | Open Source (MerpMod/DimeMod), COBB, standalone |
| MY08–14 | GR/GV WRX & STI, SH Forester XT | Open Source (MerpMod/DimeMod), COBB, standalone |
| MY15–21 | VA WRX/STI, Liberty GT, FA20 | COBB, Open Source, standalone |
| MY22–25 | VB WRX, FA24 | Open Source, COBB, standalone |
| Built / Motorsport | Any EJ, FA, FB | Haltech, Link, AEM, Emtron |
Turbo petrol Subaru coverage MY99–25. Naturally aspirated models quoted case-by-case.
Not sure which platform suits your build? That's the first conversation we have — matched to your goals, your budget and your hardware, not to whatever's easiest to sell. Every tune includes a cost-free follow-up.
03 / Mild → Wild
04 / Investment
One anchor price. Honest scope. No hidden line items.
05 / In Their Words
These guys are very knowledgeable and very upfront. Their work is impeccable. I took my car to another highly recommended shop just to be very disappointed until I found ChilliTuned.
Very happy that my car was tuned with James. The pre-tune inspection found a few issues with my car that he was more than happy to help sort out.
Do yourself a favour and hand your car over to James from ChilliTuned. When you leave your car, forget about the car you had. Forget how it drove; forget mild.
Went from a flat spot everywhere to a dead-smooth power curve. James talked me through every log. Worth the drive up from Brisbane.
Honest advice, no upselling. He told me what NOT to buy yet. The daily is safer and quicker than it's ever been.
The pre-tune checks caught a failing fuel pump two other shops missed. Then it made more power than the quote promised.
06 / Intake Protocol
Provide car specs to configure scheduling.