Rototest - Frequently Asked Questions

All the information contained on this site should be taken as recommendations and advice. Whilst every effort is made to ensure the information is correct, modification or changes may be made without prior notice. Minister-Power do not accept any responsibility for damage or loss emanating from the information on this web site.


How much power can your 'In-Chassis Dyno' handle?
What should I do before I bring my car to you for an 'In-Chassis Dyno' test?
What are the advantages of a hub mounted dyno over rolling roads?
Do you have any experience with operating Dynamometers?
How much will a power test cost?
Will my car get enough clean fresh air during the test?
Will someone be with my car while it is being tested?
Can you repeat the test accurately at a later date?
What can I do if my engine turns out to be down on power?
How long will a power test take?
Can you do different sorts of power tests?
Will my car need to be secured with straps to stop it breaking loose like on rolling roads?

How much power can your 'In-Chassis Dyno' handle?

In two wheel drive mode we can handle 740Bhp
Back to Top


What should I do before I bring my car to you for an 'In-Chassis Dyno' test?

Make sure that engine and transmission oils and engine coolant are at their optimum level and that there is sufficient fuel in the tank. If there is no charging system, make sure that the battery is fully charged and a slave battery is available in good condition. Any tools for Locking wheel nuts need to be readily available. The clutch, brakes and gears need to be in working order and transmission oils need to be at the correct level.
Back to Top


What are the advantages of a hub mounted dyno over rolling roads?

The most obvious is that there is no tyre slip so a more accurate and repeatable reading can be taken. There are not the safety issues associated with wheels and rollers rotating at high speed and inertia. The car will sit on its own suspension as it would if standing on the road so that transmission angles remain uneffected.
Back to Top


Do you have any experience with operating Dynamometers?

We have been operating Dynamometers of many different types for over 30 years, ranging from Tanks and Truck engines to Formula and GT car engines.
Back to Top


How much will a power test cost?

Power tests start at £100 +VAT.
Back to Top


Will my car get enough clean fresh air during the test?

We have invested in an adjustable air replacement system that could almost double as a wind tunnel. With 5 industrial size fans blowing fresh air at the car and an air extraction system pulling air out of the test cell we can ensure that plenty of fresh air is always available for cooling and engine induction systems.
Back to Top


Will someone be with my car while it is being tested?

Yes. Our engineers will be with the car monitoring the instruments and to generally keep an eye on things.
Back to Top


Can you repeat the test accurately at a later date?

Yes our test environment allows us to replicate engine/transmission temperatures and we have sensors for air intake humidity, barometric pressure and temperature for calibration between tests.
Back to Top


What can I do if my engine turns out to be down on power?

You may have your own arrangements to overcome engine power deficiencies, if not we can offer advice and even carry out the work on site.
Back to Top


How long will a power test take?

We aim to complete a power test in around an hour.
Back to Top


Can you do different sorts of power tests?

Yes, we can configure a test to suit your personal requirements, from running in an engine to various modes of power or speed tests.
Back to Top


Will my car need to be secured with straps to stop it breaking loose like on rolling roads?

No. One of the reasons that we made the extra investment of an 'In-Chassis-Dynamometer' was to avoid the pitfalls with 'Rolling Roads' such as keeping the car from breaking loose and many other safety issues.
Back to Top