True Rear Wheel Horsepower

1 Мар 2015 | Author: | Комментарии к записи True Rear Wheel Horsepower отключены
Bimota SB8R Sport Bike

True Horsepower — HP scale — The I ndustry achievable HP standard

Today, 75% of the entire world’s hp values are a of dynojet hp and dynojet dyno rough approximations of dynojet some brake dyno dynojet channel that’s +/- 10% of a dj some dynos that out the dj numbers and imply that know what the transmission hp and hp is, and even other dynos the most expensive brochure read whatever the user them to read, True, SF and DJ. or make up your own inflation (sigh. )

All because some guy that a 1985 over 1400cc prerelease version V Max 145 crank hp according to the marketing and he couldn’t have his new inertia read 90 hp on a stock dealership Well, he was correct at 90-95 hp, but he made it read 120 to sell of his dynos. And that’s where the dyno hp mess started. more about inflated hp


Corrected True HP is

Actual power under State (preferred)

or Sweep CORRECT inertial mass at 20 f/ps

delivered to the drive of a chassis dyno

to which is added the dyne coast parasitics and then

corrected to atmospheric test conditions.

Pro has confidentially refused to exaggerate and corrected horsepower figures to more dynos.

Since Pro hasn’t rescaled horsepower for the 20 year and our software reads the files the same from the first EC997 dyne

Some Dynamometer companies add to rear wheel power a factor that is based on rear wheel power (under what power 125cc? 1200cc? under conditions? with a 3.00×17 ply tire? a 190×17 radial

New heavy radial tire vs. old, light, stock ply tire? Who knows?)

In short, is NO meaningful average tire to get a rear tire power loss measurement for all bikes so obviously, unless they measure the power lost in the tire, under driven conditions, NO dyno company BE ADDING incorrect power into the measured power. simply wrong.

The fact they add varying amounts of to the actual, true amount of delivered and measured to the surface of the roller creates a situation makes it an onerous task to power figures from brands of dynamometer systems.

On inertial dynamometers, some actually, all that I know of in the MC companies use an average for the inertial value of the engine, transmission, wheel, sprocket and chain on bike — as if a YZ125 has the rear wheel or internal mass as a 1340cc Harley Needless to say, if the software that the YZ125 had a HD rear on it, it would look like the 125 more HP at the rear wheel it does at the crankshaft. It’s wrong.

And — that’s why you hear of Karts that make 43 hp at the wheels.

Bimota SB8R Sport Bike

It’s expensive to frictional losses in the engine and requiring the dyno to be able to the vehicle with engine Add the cost of a 50+hp electric controlled power supply, It’s just not likely $20,000 dyno will be with that equipment.

It is also common for dynamometer to add to the power readings by adding and primary gear/chain losses into the measured power Some companies make a effort try to measure frictional and, optionally, add the power to the readings. Other companies some that would you — say that it’s not and give a blanket, single for frictional losses in every

That includes some dynes.

Some simply say there is a meaningful average for motorcycle,(2 …, 4 …, 1 transmission, 4 cylinder/1 transmission) and it to every bike and that it is not a difference.

Blanket estimates of losses and corrections are, simply, incorrect. At the upper of the industry, (we are talking about — $500,000 AC or DC 4 quadrant it is not tolerated — shouldn’t be and needn’t be.

There is a dyno company actually has different versions of that displays their own data files as different of power depending on whether you use the DOS or the Windows version of their

True Rear Wheel ™ is Factory Pro’s of measuring the power that is delivered to the rear wheel. It is true, fair and duplicable. It is the standard that can be duplicated by the industry — regardless of the manufacturer.

Following is a reference so that, if you are used to rather HP figures, you can see what your would generally make on the HP Scale.

True HP as compared to

It’s not possible to give an conversion factor, as it appears dj dynos don’t all read the (my experience, other’s, too — and Mag and 2002 Roadracing World and R1 comparison articles), but, you can True HP from EC997’s and an average djhp of of an average dj — empirically derived, 20 years of comparison of the two hp scales.

Bimota SB8R Sport Bike


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