ECU & TCU Remapping Services
EC Performance provides professional ECU remapping services and TCU remapping services from our Ammanford workshop, covering Swansea, Neath, Carmarthen, Brecon and the wider South Wales area. Factory ECU maps are deliberately conservative — built to cope with poor fuel quality, extreme climates and worst-case driving conditions worldwide. Remapping rewrites that software specifically for your vehicle, your fuel and your goals.
Whether you want a Stage 1 power and torque increase, a smoother and faster-shifting automatic gearbox via TCU remapping, or an economy remap to cut fuel costs on a daily driver or fleet vehicle, every job is precision-tuned in-house and verified on our MAHA 4-wheel dyno before you drive away.
Why EC Performance
We’re a South Wales-based independent tuning specialist covering everything from daily runabouts to HGVs, agricultural machinery and marine engines — all backed by real dyno data.
Every remap we sell is covered for the life of the vehicle, and your original factory file is always kept on file so we can return you to stock at any point, no questions asked.
We don’t just tell you the gains — we show you. Our in-house MAHA 4-wheel rolling road lets us run before-and-after pulls so you see exactly what your ECU remapping service has delivered.
Cars, vans, HGVs, agricultural and plant machinery, motorbikes, ATVs and marine engines from jet skis to super yachts — our ECU remapping services aren’t limited to cars.
Beyond engine tuning, our TCU remapping service sharpens shift points and shift speed on automatic and dual-clutch gearboxes for a noticeably crisper driving experience.
What's Included
From a first Stage 1 remap to a full custom conversion, here’s what’s included across our ECU and TCU remapping services.
Stage 1 suits a standard, unmodified vehicle for bolt-on power and torque gains. Stage 2 is built around a modified intake and exhaust setup. Stage 3 is a full custom conversion for heavily modified builds, mapped specifically to your hardware.
Not every remap is about outright power. Our economy remapping service smooths delivery and optimises fuelling for reduced running costs — popular with fleet operators, van owners and high-mileage drivers.
We remap the transmission control unit alongside or independently of the engine ECU, sharpening gear change speed and shift points on DSG, S-Tronic and other automatic gearboxes.
Our ECU remapping services extend well beyond cars — commercial vehicles, tractors and plant machinery, motorbikes, ATVs and marine engines are all catered for, tuned to the same standards.
Also available: towing performance mapping, launch control & rev limiter tuning, pop & bang / burble maps, ADBLUE, DPF & EGR solutions, and speed limiter installation or adjustment.
FAQ
ECU remapping tunes the engine's software — power, torque and fuelling. TCU remapping tunes the gearbox's software separately, sharpening shift speed and shift points on automatic and dual-clutch transmissions. Many customers have both done together.
Yes, when done properly. We always back up your original factory file before writing anything, use a stable bench power supply during the write, and verify the result on our dyno before you leave. Every remap carries a lifetime software warranty.
Most Stage 1 remaps are completed within a few hours including a full vehicle health check and dyno verification. Bench or boot-mode ECUs, or TCU remaps alongside engine tuning, can take a little longer — we'll always confirm timings when you book.
A performance remap typically has a small negative impact on economy if driven the same way, though many customers report improvements simply from needing less throttle to get the same response. Our economy remap option is specifically tuned to reduce fuel costs instead.
Yes — our ECU remapping services cover vans and light commercial vehicles as standard, including fleet vehicles, with economy-focused options available for businesses looking to cut fuel costs across multiple vehicles.
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