Bhp--vs---rwhp

[Mike]

Is there a real difference between BHP & RWHP? :confused: I was reading about the 1000HP Mustang and they talked about HP at the crank and then BHP.

[Spectragod]

Is there a real difference between BHP & RWHP? :confused: I was reading about the 1000HP Mustang and they talked about HP at the crank and then BHP.

Was there a difference between the #'s?

[RF Overlord]

BHP is Brake HorsePower and is measured at the flywheel. RWHP is Rear Wheel HorsePower and should be self-explanatory. The difference is between 15 and 20% depending on the drivetrain.

[Chayton]

Is there a real difference between BHP & RWHP? :confused: I was reading about the 1000HP Mustang and they talked about HP at the crank and then BHP.

yes of course. BHP is like you said measured at the crank/flywheel. RWHP is at the wheels, like when you take the car to a dyno. There is a loss in power from the flywheel to the actual wheels. Automatic transmissions are said to rob more horsepower than a manual.

[justbob]

Are you asking RWHP vs BHP vs at the crank??



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[Gigan]

IIRC BHP is also measured without engine accessories

[Bluerauder]

Is there a real difference between BHP & RWHP? :confused: I was reading about the 1000HP Mustang and they talked about HP at the crank and then BHP.

In general:

Nominal HP is derived from the size of the engine and the piston speed and is only accurate at a pressure of 48 kPa (7 psi).

Indicated or gross horsepower (theoretical capability of the engine)

.... minus frictional losses within the engine (bearing drag, rod and crankshaft windage losses, oil film drag, etc.), equals

Brake / net / crankshaft horsepower (BPH) (power delivered directly to and measured at the engine's crankshaft)

.... minus frictional losses in the transmission (bearings, gears, oil drag, windage, etc.), equals

Shaft horsepower (power delivered to and measured at the output shaft of the transmission, when present in the system)

.... minus frictional losses in the universal joint/s, differential, wheel bearings, tire and chain, (if present), equals

Effective, True (thp) or commonly referred to as wheel horsepower (whp)

[jwibbity]

In general:

Nominal HP is derived from the size of the engine and the piston speed and is only accurate at a pressure of 48 kPa (7 psi).

Indicated or gross horsepower (theoretical capability of the engine)

.... minus frictional losses within the engine (bearing drag, rod and crankshaft windage losses, oil film drag, etc.), equals

Brake / net / crankshaft horsepower (BPH) (power delivered directly to and measured at the engine's crankshaft)

.... minus frictional losses in the transmission (bearings, gears, oil drag, windage, etc.), equals

Shaft horsepower (power delivered to and measured at the output shaft of the transmission, when present in the system)

.... minus frictional losses in the universal joint/s, differential, wheel bearings, tire and chain, (if present), equals

Effective, True (thp) or commonly referred to as wheel horsepower (whp)

well now that that's cleared up, lets go ahead and lock this up, lol

[whitey]

In general:

Nominal HP is derived from the size of the engine and the piston speed and is only accurate at a pressure of 48 kPa (7 psi).

Indicated or gross horsepower (theoretical capability of the engine)

.... minus frictional losses within the engine (bearing drag, rod and crankshaft windage losses, oil film drag, etc.), equals

Brake / net / crankshaft horsepower (BPH) (power delivered directly to and measured at the engine's crankshaft)

.... minus frictional losses in the transmission (bearings, gears, oil drag, windage, etc.), equals

Shaft horsepower (power delivered to and measured at the output shaft of the transmission, when present in the system)

.... minus frictional losses in the universal joint/s, differential, wheel bearings, tire and chain, (if present), equals

Effective, True (thp) or commonly referred to as wheel horsepower (whp)
http://youtu.be/s3KUEkxkbKc jk charlie

[Mike]

BHP is Brake HorsePower and is measured at the flywheel. RWHP is Rear Wheel HorsePower and should be self-explanatory. The difference is between 15 and 20% depending on the drivetrain.

The artical was in Road & Track and was talking about the Cobra and 1000hp Mustang and it was comparing the difference between the BHP & RWHP in the Mustang. I know what RWHP was, but wasn't sure where they measured the BHP from (I was thinking somewhere near the rear wheels because of the "brake" reference) and now I know...Thanks :beer:

[Shaijack]

Mike the HP of your Smart Car does not register on any dyno.

[Mike]

Mike the HP of your Smart Car does not register on any dyno. :bigcry: :bigcry: :bigcry: