what is ps opposed to hp?

[liquid8]

i noticed that on japanese things they always say 190ps instead of 190hp. what's the difference?? can anyone tell me.. is it just letters that are different or do they have different values? is ps more than hp?

[tuningmaniacs]

Well i'm not sure of the meaning in japanese as i only know a few words but if it would be german then it would mean exactly the same. I'll explain below:

PS = Pferdestärke (which translates into english exactly as horsepower).



Watashi no namae Arekkusu wa
Sayonara

[Setanta]

power/stroke. Japanese varient of bhp, but 1 p/s doesn't = 1 bhp. Example: My SiR is 160p/s which I think moppie worked out to be 158bhp.

[liquid8]

that sucks!!!!!!!! haha

[Setanta]

It sounds better if you tell yourself you have more PS for your BHP

[NSX]

so did it originate from the german word or power/stroke?

[tuningmaniacs]

Well all this is quite interesting so i started researching a bit on the net and this is what i found:

HORSEPOWER (HP)
The measure of rate of work. One horsepower is equivalent to lifting 33,000 pounds to a height of one foot in one minute. The horsepower of a motor is expressed as a function of torque and speed. For motors the following approximate formula may be used:

HP = (T x RPM)/5250
where HP = horsepower, T = torque (in. lb. ft.), and RPM = revolutions per minute.

TORQUE
Turning force delivered by a motor or gearmotor shaft, usually expressed in
lbs. Ft = HP x 5250 = full load torque RPM

On another site i found:

horsepower: (HP) A measurement of the engine's ability to perform work. One horsepower is defined as the ability to lift 33,000 pounds one foot in one minute.
To find horsepower, the total rate of work in foot pounds accomplished is divided by 33,000. If a machine was lifting 100 pounds 660 feet per minute, its total rate of work would be 66,000 foot pounds per minute. Divide this by 33,000 foot pounds per minute to arrive at 2 horsepower. In metric terms, it is the ability to raise 250 kilograms a distance of 30 centimeters in one second. It is also equal to 746 watts.

brake horsepower: (bhp) A measurement of the actual usable power (not calculated power) measured at the output shaft (usually the crankshaft) rather than at the driveshaft or the wheels. Thus none of the auxiliaries (gearbox, generator, alternator, differential, water pump, etc.) are attached. It is called the brake horsepower because the shaft power is usually measured by an absorption dynamometer or "brake." This is not the brake on the vehicle's wheels but a testing device applied to the shaft. This instrument is applied to stop or absorb the rotation of the output shaft and returns a value.

SAE horsepower: A simple formula of long standing is used to determine horsepower. The formula is: (bore diameter) squared times (number of cylinders) divided by 2.5. This formula is used primarily for licensing purposes and is not very accurate for determining actual brake horsepower. Also called rated horsepower.

SAE gross horsepower: A production engine's actual power available at the flywheel or output shaft (usually crankshaft) as tested with an absorption dynamometer. It differs from SAE net horsepower in that many of the accessories (such as alternator, water pump, etc.) are not attached. Engines before 1973 were primarily measured with these "gross" numbers. Since 1973, "net" figures were published. This confusion caused many people to suppose that their engine had been seriously de-tuned when they saw that the same engine in 1972 had 400 hp but in 1973 had only 235 hp. (This example is from the Cadillac 500 cubic inch engine).

SAE net horsepower: The brake power (power available at the flywheel or output shaft -- usually the crankshaft) of a fully equipped engine fitted with all the accessories necessary to perform its intended functions unaided. In 1973, automobile manufacturers began publishing their engine specifications in "net" horsepower and "net" torque instead of "gross" figures. In many cases the published numbers were significantly lower in 1973 than in 1972. Some of the decrease was attributed to the addition of pollution equipment, the lowering of compression, and the use of regular unleaded gasoline instead of premium leaded fuel. However most of the decrease in number was a switch to "net" figures.

power stroke: The third stroke of the four-stroke cycle. The piston moves downward from top dead center to bottom dead center as a result of the force of combustion acting on the top of the piston.

[liquid8]

interesting...........

[Setanta]

It's not the german word.

[tenzoracerevovii]

i heard on horsepower equals the ability to lift 550 lbs exactly one foot in exactly one second..........i've heard of that formula in two different sources.......SCC and TURBO magazine