Brake Horse Power is also known a "crank Horse power"
This is the measurement in horse power an engine will make while
NOT driving any accessories.
These accessories include:
- Alternator
- Water pump
- Belts
- Power steering
- AC
- Gear box
- Differential
and any other item driven by the engine that it does not need to directly run.
The testing is done currently in a way that measures these losses and figures out an Brake Horse Power rating