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Horsepower and Brake horsepower are really the same thing as far as mathematical calculation. The difference is how it is measured. Brake horsepower is usually a measure of an engine's horsepower at the shaft WITHOUT anything attached to the engine that would normally be required like the water pump, alternator, power-steering pump, airconditioner, etc. Brake horsepower is usually a theoretical calculation or a measurement made only in a lab under controlled conditions since an engine cannot run without most of the things that it would be required to remove. In the lab/shop they would conect the engine to the dynomometer and then supply coolent, oil pressure, electricity, etc through external means.

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What is the relationship between hp and bhp?

hello friends i will tell u diff between hp and bhp hp is the theoritical power which calculated by formule by engine designer or maker this is the power which is produced by crank when piston is acted upon by gas forces on the other hand bhp is the power which is practically obtained at the wheels of vehicle some of actual power(hp) is lost in friction or as heat in engine so we can say bhp is less than hp their is no mathematical relation between two some maker give hp in engine specification some give bhp as hp is larger than bhp so to make attraction some makers give hp in specification sahil bhatia


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