JBM Performance · Sheffield
Dyno testing.
Power you can
understand.
Power runs, custom tuning and fault finding on our in-house rolling road. See how your car performs—and understand what the results mean.
VAG & BMW specialists · Sportdevices SP5 equipped
Dyno prices
Single vehicle
£120 / 3 pulls
Power & torque report.
Data logging on request.
Group dyno day
£50 / car
3 pulls per car.
Minimum 10 vehicles.
Additional pulls £10 each. Smaller group? Ask us for a quote. Calibration and diagnostic sessions are quoted to suit the work.
What do you want to find out?
A session with a purpose.
Measure your performance
Establish a baseline or check your latest upgrades. See power and torque across the rev range, with the results explained after your session.
Develop your calibration
Controlled load and ECU logging help us develop and validate engine and transmission calibrations around your car and its hardware.
Explore tuning optionsInvestigate a running issue
Boost falling away? Inconsistent fuelling? A fault that appears under load? A planned diagnostic session lets us reproduce conditions and examine the data.
Advanced diagnosticsOur rolling road · Sportdevices SP5
Control the load.
See the detail.
Our upgraded SP5 data-acquisition and brake-control system gives us more control over each test, with measurements that help explain the power curve.
- Repeatable testing
- Hold a steady speed or run a controlled ramp to examine how the car behaves under load.
- More useful data
- Lambda, temperature and pressure measurements, plus compatible ECU data via OBD-II and CAN.
- Conditions in context
- Weather measurements support corrected results; run comparisons help us assess changes consistently.
From the JBM archive
Read the whole curve.
The shape of the curves, consistency between runs and recorded conditions all matter. We explain the result, rather than simply handing you a peak number.
Your visit
From booking to results.
Tell us about your car
Send your registration or VIN, modifications and what you want to test. We confirm suitability and the right session.
Check, prepare, test
We discuss the plan, check the car is suitable for testing and carry out the agreed runs or diagnostic work.
Understand the findings
We talk you through the results and any next steps. Printed/PDF reports are available, with logged data where included in your session.
Before you book
A few useful details.
Can you test my vehicle?
Our rolling road is a 2WD installation for suitable front- and rear-wheel-drive vehicles. Selected Haldex-equipped and BMW xDrive cars can also be tested when configured appropriately for two-wheel-drive operation. Send your vehicle details so we can confirm suitability before booking.
How should I prepare my car?
Bring the car with enough fuel for the session, correct fluid levels and tyres in good condition. Tell us about warning lights, leaks or running concerns when booking, so we can plan any diagnosis before power testing.
What can you log during a session?
Our installation includes lambda measurement, thermocouples, pressure sensors, a weather station and OBD-II/CAN interfaces. Available channels depend on the vehicle, sensor connections and the purpose of the test. Tell us what you need when booking.
Can I compare results from different dynos?
Equipment, test method, correction settings and conditions can affect the figures. For assessing a change, comparisons on the same equipment under consistent conditions are usually the most useful. We explain the context of your results.
Let’s put it to the test
Book your dyno session.
Send your registration, current specification and what you’d like to find out. We’ll confirm suitability, availability and pricing.
Unit 4, Fieldhouse Way · Sheffield · S4 7SF