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Topic: Horsepower

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In the News (Wed 17 Jul 19)

  Raw Horsepower- Performance wear & performance info
Raw Horsepower provides information and largest collection of connections to the world of high performance cars, boats, bikes, along with hot rods, classic trucks and cars.
GM's supercharged 6.2-liter LSA V8 and it's rated for an official 556 horsepower at 6,200 rpm and 551 pound-feet of torque.
Raw Horsepower is a registered trademark and cannot be copied or duplicated.
www.rawhorsepower.com   (2083 words)

  Horsepower: Gross vs. Real-World   (Site not responding. Last check: )
Horsepower is officially defined as "the amount of energy required to lift 550 pounds, one foot, in one second." This definition dates back to when cars didn't even exist and, despite the worldwide acceptance of the metric system (America not withstanding) in which feet have been replaced by meters, the definition remains in use today.
Generally speaking, horsepower is an indication of how capable a vehicle is at moving itself around and, consequently, the more horsepower a vehicle possesses, the quicker it can move between two points.
Gross horsepower is a measurement of engine output, taken at the flywheel, without the engine installed in a vehicle.
www.edmunds.com /ownership/techcenter/articles/43845/article.html   (834 words)

  Horsepower - Wikipedia, the free encyclopedia
In scientific discourse the term "horsepower" is rarely used due to the various definitions and the existence of an SI unit for power, the watt (W).
The most-common definition of horsepower for engines is the one originally proposed by James Watt in 1782.
Gross horsepower figures were also subject to considerable adjustment by carmakers: the power ratings of mass-market engines were often exaggerated, while those for the highest-performance muscle car engines were frequently underrated.
en.wikipedia.org /wiki/Horsepower   (2791 words)

 Tax horsepower - Wikipedia, the free encyclopedia
The tax horsepower was an early system by which taxation rates for automobiles were reckoned in some European countries, like Britain, Germany, and France (where it is still used, and termed 'Puissance Fiscale').
The tax horsepower rating was based on a pure mathematical formula based on cylinder dimensions.
The British system was based on the RAC horsepower rating which only included total piston area.
en.wikipedia.org /wiki/Tax_horsepower   (201 words)

 Horsepower and Torque   (Site not responding. Last check: )
A horse exerting 1 horsepower can raise 330 pounds of coal 100 feet in a minute, or 33 pounds of coal 1,000 feet in one minute, or 1,000 pounds 33 feet in one minute.
• 1 horsepower is equivalent to 746 watts.
If you took that 746 watts and ran it through an electric heater for an hour, it would produce 2,545 BTU (where a BTU is the amount of energy needed to raise the temperature of 1 pound of water 1 degree F).
ffden-2.phys.uaf.edu /103_fall2003.web.dir/Chris_Peterson/horsepowerandtorque.htm   (511 words)

 Horsepower loss through drivetrain
Horsepower ratings for any vehicle are not a complete representation of how they perform on the track or on the street.
Horsepower numbers offer the owner the ability to "bench race" with authority and offer bragging rights when no track is available to proof who is best.
Since the force required to spin the gears grows with speed, and since increased horsepower is causing the rate of acceleration to increase (your engine revs faster on the dynamometer) you will find that the actual amount of work required to spin the gears greater than with lower horsepower.
www.superstang.com /horsepower.htm   (6609 words)

 Off-Road.com Tech Article: Torque and Horsepower
The last term is the conversion factor from lbs*ft/s to horsepower.
Note that the horsepower peak is at a higher rpm than the torque peak.
In the next article, we will talk about what the torque and horsepower curves mean to us, and how we make them do what we want go get us up and over rocks and down the trail.
www.off-road.com /hummer/tech/power.html   (1275 words)

 Horsepower Vs Torque   (Site not responding. Last check: )
Thus, horsepower is a measure of force in pounds against a distance in feet for a time period of one minute.
Horsepower will follow suit, and it will fall in the engine speed range dictated by the many factors that affect the torque curve.
The lobe separation angle is the angle between the peak of the intake lobe and the peak of the exhaust lobe expressed in cam degrees.
www.carcraft.com /techarticles/868   (4974 words)

 ClubCivic.com - Reference: Horsepower And Torque Explained   (Site not responding. Last check: )
Brake horsepower is a common term and refers to the power measured at the crankshaft using a "prony" brake.
Brake horsepower is much lower than the horsepower specs provided by the manufacturers, because of all the power used by the transmission, final drive, and accessories.
Net horsepower is also measured at the crankshaft before it goes into the transmission, but this time the engine is operated as it is installed in the vehicle, complete with accessories and ductwork.
www.clubcivic.com /board/showthread.php?t=2039   (2255 words)

 Understanding Horsepower and Torque   (Site not responding. Last check: )
Hoist C defines horsepower: One foot times 550 pounds in one second is one horsepower or 1 foot times 33,000 pounds.
Thus, the equation for calculating horsepower with a given amount of foot pounds is borne.
Do you remember the hoist example whereas hoist B produced much higher horsepower than hoist B? However, we noted that hoist B would be the appropriate and only hoist to have if the load were to exceed 100 pound.
home.inu.net /davidstua/horsepower_and_torque.htm   (2561 words)

 GM - GMability Education 5-8: Technology - Horsepower and Torque Explained   (Site not responding. Last check: )
Horsepower was originally used to describe how much work early engines could do relative to how much work a horse could do.
Horsepower is equal to 33,000 foot-pounds of work per minute.
Stated another way, one unit of horsepower is what it takes to lift 33,000 pounds the distance of one foot in one minute.
www.gm.com /company/gmability/edu_k-12/5-8/technology/ice_horsepower.html   (413 words)

Generally, horsepower is graphed as a function of the engine's speed (RPM), which produces a graph that looks like this.
The horsepower I measured for 70MPH in second gear is extremely close to that of the value True Blue Performance calculated in third.
Horsepower is based on the speed of an engine and not on the speed of the vehicle.
home.nc.rr.com /jeepphysics/horsepower.htm   (379 words)

 Horsepower v torque
There is a lot of confusion about the relationship between horsepower and torque, I was guilty until I decided to do some investigating.
One horsepower equals 33,000 foot pounds per minute, so if we divide 6.2832 in to 33,000 we can conclude that we at 5252 rpm we are producing one horsepower, we are moving our one pound weight 33,000 feet every minute.
Horsepower factors rpm in to the torque equation.
www.v8914.com /Horsepower-v-torque.htm   (1263 words)

 HorsePower Calculator
The horsepower calculation is correct by the definition of horsepower.
Horsepower is a measure of the force required to accelerate a weight to a known speed in a know distance.
So the generate horsepower by this calculator is the actual horsepower at the rear wheels.
www.clarkes96ss.cz28.com /hpcalculator.html   (120 words)

 Horsepower - definition   (Site not responding. Last check: )
The idea of "horsepower" has a more glamorous sound to it, though, and it's possible to say things like "four horsepower electric kettle" instead of "3 kilowatt electric kettle".
The reason why the horsepower got defined as about three-quarters of a kilowatt is because it's based on how much work you can get a horse to do in a day.
The definition of horsepower dates back to the the time when pumping of water out of mine shafts could be done by having a horse on a treadmill or by the more modern method of using an engine.
www.zyra.org /horsepwr.htm   (253 words)

 News Item: Electric Motor Brake Horsepower Calculations   (Site not responding. Last check: )
The ability to determine actual motor operating horsepower on any motor, compressor motor, evaporator blower motor, or tower motor, is useful in troubleshooting problems or performing energy audits.
The common use for this calculation is to determine the actual operating horsepower for a motor as it is presently being used.
There are 746 watts in one horsepower, so every time a motor develops or uses 746 watts it has done one horsepower of work.
www.achrnews.com /CDA/ArticleInformation/NEWS_EE_News_Item/0,6164,136754,00.html   (2343 words)

 Straight Dope Staff Report: What's the difference between horsepower and torque?
Measures of engine performance such as torque and horsepower are relatively simple, yet are often badly misunderstood by the public.
First, let’s note that horsepower is a unit of measurement for power, in the scientific sense of the term, just as the foot is a unit of measurement for length.
Horsepower measures the same thing that the watt does--the power that a device can create or consume.
www.straightdope.com /mailbag/mhorsepower.html   (1245 words)

 HowStuffWorks "How Horsepower Works"
In this article, you'll learn exactly what horsepower is and how you can apply it to your everyday life.
Watt lived from 1736 to 1819 and is most famous for his work on improving the performance of steam engines.
It is that arbitrary unit of measure that has made its way down through the centuries and now appears on your car, your lawn mower, your chain saw and even in some cases your vacuum cleaner.
www.howstuffworks.com /horsepower.htm   (695 words)

 What is Horsepower?
Although the standard for rating horsepower has been available for over 200 years, clever car manufacturers have found ways to change the ratings of their engines to suit their needs.
Between 1922 and 1947, the Royal Automobile Club used a horsepower rating that was the basis for an automobile tax.
The horsepower of an engine was determined by multiplying the square of the cylinder diameter in inches by the number of cylinders and then dividing that figure by 2.5.
www.web-cars.com /math/horsepower.html   (656 words)

 Horsepower   (Site not responding. Last check: )
In my humble opinion, a 5 horsepower 2 cycle outboard might be enough for about 25 MPH with a driver less than 100 lbs in weight.
I would never recommend going over rated or recommended horsepower ratings, but I must admit that I have done it myself (and eventually paid for it.) I actually have run a 25 horsepower and 35 horsepower Evinrude on the back of this style hull.
I also came up with a hybrid 25 horsepower with a thirty five horse carb, intake, reeds, and lower unit with a modified exhaust.
www.nrkproductions.com /Tankar/horsepower.htm   (590 words)

 boiler horsepower   (Site not responding. Last check: )
The earliest such measure of boiler output, the “nominal or rated boiler horsepower,” was simply based on the area of the boiler's heating surface.
This “developed boiler horsepower,” was defined as the ability to turn 30 pounds of 100°F feedwater per hour into steam at 70 pounds per square inch pressure.
The boiler horsepower could be defined purely as a quantity of power, in units of energy (Btu) per unit of time (hour), doing away with pounds of water and temperatures while retaining the original magnitude.
www.sizes.com /units/horsepower_boiler.htm   (388 words)

It is attached with a pulley block system and spring balance to the rotating shaft of the engine to measure the output of the engine.
The radius arm on the Prony brake horsepower tester is 4 feet.
One horsepower is the equivalent of 746 watts.
library.thinkquest.org /4116/Science/horse.htm   (495 words)

 Horsepower   (Site not responding. Last check: )
The term horsepower was originated by James Watt, (1736-1819).
In the 1960s, automobile manufacturers were in a horsepower race.
Horsepower is not a constant at all engine speeds.
www.carnutgarage.com /technical/Technical_1.html   (680 words)

 Horsepower confusion and resolution - Columns - Car and Driver April 2006
But horsepower is not as precise a number as you might think.
A new twist to the horsepower standard is a practice called “SAE certified.” Under this optional program, an automaker allows an SAE-designated third-party witness to verify that an engine produces the advertised figure.
For example, according to DaimlerChrysler’s senior manager of SRT Powertrain, Pete Gladysz, Dodge rates its Viper V-10 at 510 horsepower, even though a randomly selected V-10 that was plucked from the assembly line and broken in according to DC’s usual cycle developed 512 horsepower on the dyno run for the designated witness.
www.caranddriver.com /columns/10822/larry-webster-horsepower-confusion-and-resolution.html   (403 words)

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