Dyno Health Checks

Dyno Health Checks – Measure Your Car’s True Power Output

Dyno Health Checks

Want to know if your car is performing as it should? Our Dyno Health Check service in Slough gives you an accurate measurement of your vehicle’s horsepower, torque, and power delivery curves. By running your car on our in-house 2WD & 4WD rolling road dyno, we can identify whether your engine is producing the power it should — and highlight any performance issues early.

Perfect for both standard vehicles and modified cars, a dyno health check is the best way to ensure your car is running safely, efficiently, and delivering the performance you expect. Whether you’re checking before modifications, after upgrades, or just for peace of mind, our dyno testing provides clear, measurable results.

Located in Slough, near Langley, Berkshire, we’re trusted by enthusiasts, supercar owners, and daily drivers across the UK for our professional dyno health checks and performance testing.

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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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Book a Dyno Health Check in Slough

on’t rely on guesswork — let our rolling road dyno tell you exactly how much power your car is making. Our health check includes a full dyno run, printed performance graphs, and expert feedback on your car’s condition. Ideal for spotting issues before they become costly, verifying manufacturer claims, or checking the results of modifications.

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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

What is a dyno health check?

It’s a diagnostic power run on our rolling road dyno to measure your car’s horsepower, torque, and overall performance health.

Why should I book a dyno health check?

It ensures your car is delivering the power it should and can highlight hidden problems before they cause major damage.

Can you dyno test both 2WD and 4WD vehicles?

Yes — our dyno supports front-wheel drive, rear-wheel drive, and four-wheel drive cars, from hot hatches to supercars.

Do I get a printout of results?

Yes — every health check includes a detailed dyno graph showing power and torque output.

Is dyno testing safe for my car?

Absolutely — our dyno simulates real driving conditions in a controlled environment, making the process completely safe.

Do you offer dyno health checks for modified cars?

Yes — whether stock or modified, our dyno runs help confirm your car’s true performance.

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