Dyno Tuning for Modified Cars and Engine Upgrades

When you’ve invested in performance upgrades and engine modifications, dyno tuning is essential to unlock their full potential. At our Slough-based dyno facility, we specialise in custom ECU remapping and live dyno calibration for modified cars, ensuring your upgrades deliver maximum power, torque, and reliability.

Our in-house 2WD & 4WD rolling road dyno allows us to simulate real driving conditions, so every change is tested and measured with precision. From intake and exhaust upgrades to turbo and intercooler conversions, we fine-tune your setup for smooth drivability, safe air-fuel ratios, and proven performance gains.

Based in Slough, near Langley, Berkshire, we are trusted by enthusiasts and performance car owners nationwide for our accurate dyno-tested tuning services.

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Why Choose Onyx Performance?

As Seen on Carwow

We’ve been proudly featured on Carwow – a testament to the quality, professionalism, and performance-focused results that set us apart. Watch our feature here to see us in action.

Expertise You Can Trust

With years of experience and deep technical knowledge, our team understands performance vehicles inside and out – from custom remaps to high-end servicing.

Advanced Workshop & Tools

We operate from a state-of-the-art facility in Slough, equipped with cutting-edge diagnostics, dyno testing, and industry-leading tools for accurate, high-quality work.

Tailored Solutions for Every Vehicle

We don’t believe in one-size-fits-all. Every car gets a bespoke approach, ensuring the best results whether it’s a remap, upgrade, or routine service.

Trusted Nationwide

Performance enthusiasts from across the UK come to Onyx because they know they’ll receive premium-quality workmanship, careful attention to detail, and honest advice.

Complete Care, All in One Place

From tuning and servicing to tyres, trackers, and immobilisers – we offer a full suite of services under one roof, all with a strong focus on safety, reliability, and top-tier customer support.

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Dyno Tuning for Modified Cars & Engine Upgrades in Slough

Don’t let your performance parts go to waste — make sure they’re working at their best. Book your dyno tuning session at our Slough-based facility and get a bespoke ECU remap designed specifically for your car and modifications. With before-and-after dyno graphs, live data monitoring, and expert calibration, we guarantee proven results, enhanced drivability, and engine safety.

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Why Choose Onyx Performance for Servicing?

Experts in Performance Cars

We know how to properly care for performance, modified, and luxury vehicles. Our team has the skills and experience to handle specialist requirements confidently.

Correct Service Schedules

Every service follows the exact schedule recommended by your vehicle’s manufacturer, helping maintain performance and protect your warranty.

Quality or OEM Parts

We only use high-quality aftermarket or original manufacturer parts, ensuring long-lasting reliability and top-level performance.

Full Vehicle Inspection

Our service goes beyond just changing oil. We inspect all key systems to keep your car safe, smooth, and road-ready.

Honest Advice, No Surprises

With transparent pricing and expert recommendations, you’ll always know what your car needs – no upselling, no hidden fees.

Fast, Trusted & Tracked

We offer quick turnaround, maintain service records, and send reminders – that’s why customers travel to us from across the UK.

Frequently Asked Questions

Why is dyno tuning important after engine upgrades?

Because modifications like turbos, intakes, and exhausts change how your engine runs — dyno tuning ensures everything works in harmony.

What types of upgrades benefit from dyno tuning?

Pretty much all — including turbo conversions, superchargers, intercoolers, exhausts, intakes, and high-flow fuel systems.

Will dyno tuning improve reliability as well as power?

Yes — our tuning keeps your engine running within safe parameters, protecting it while maximising gains.

Do you provide before-and-after dyno graphs?

Yes — every session includes a printout of horsepower and torque figures so you can see the improvements clearly.

How long does dyno tuning take?

Typically 3–4 hours, but complex builds may take longer depending on modifications.

Do you tune both 2WD and 4WD modified cars?

Yes — our dyno supports front-wheel drive, rear-wheel drive, and all-wheel drive vehicles.

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