[T3] I'M BACK !

[Jim Adney]

On 4 Dec 2013 at 21:57, Dave Pallo wrote:

> What does the bhp stand for?

Brake Horse Power.

In this context, a brake is a device just like the brake on a wheel. 
It's used to put drag on an engine or drive train system with a means 
to measure the rate of power dissipation in the brake. Dynos consist 
of a brake and its instrumentation.

What's done is to apply increasing amounts of drag until the engine 
can no longer maintain its speed. The peak drag gives the max 
available power at that speed.

A typical Dyno uses a pump to push water thru a valve that can be 
opened and closed. The pressure drop across the valve times the flow 
rate of the water gives the power. In this process the water gets 
heated, so there's typically some means of cooling the water as it 
flows thru the system.

Depending on the testing standard used, the brake can be applied 
anywhere in the drive train.

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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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