The Porsche Dyno Service

Parr can offer full chassis and engine dynamometer facilities in a controlled environment test cell. The 800 Bhp Porsche Dyno cell allows Parr to accurately measure the performance of your car without external influences affecting the data.

Parr wanted a system that was as accurate and flexible as possible and after looking into all the options only one solution was acceptable a hub mounted system. With this system the hub of the vehicle is directly attached to a hydraulic absorption unit.

We can apply a variable but precise load – all the way up to a hydraulic lock if we needed to. Simultaneously we are monitoring load and measuring the hub RPM, so we can determine the amount of work being performed. It sounds easy until you realise that all of these calculations are very complex and are happening very quickly.

Add to this, all of the data logging functions and real-time full-colour graphics that are also being calculated, and you begin to realize that what appears to be simple is actually very complex. We have total control of the axle. Literally. Want to hold a steady RPM? We can hold an axle RPM (within 3 rpm) for a stable engine at any power level – all the way up to the rated maximum torque capacity of the Dyno for as long a period of time as you’d like. If the software allowed it, we could stop the engine within one revolution of the crankshaft.

Another benefit of having virtually zero inertia is the ability to change the rate of acceleration at will. In many simulations, you may want to make the vehicle accelerate at a different rate to simulate a specific condition. With a few simple keystrokes, we can allow the vehicle to accelerate very quickly, very slowly, or anywhere you’d like in between.

Because of the lack of inertia and the total control we have over the axle speed, we give you choices. Our runs are repeatable to within three-tenths of one percent!

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