910 Guess the stock dyno
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135 before, and 147 after
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Depend on the dyno but a DynoJet dyno would most likely see about 120hp stock and hopefully 128hp with the mods. (rear wheel)
This is using the SAE correction factor and about 12% driveline loss.
4th gear pulls also,(industry norm) 5th gear will give inflated numbers.
This is real world wheel horsepower, not some "happy" dyno numbers.
STD, uncorrected or DIN numbers will be higher.
What do I win?
John T
This is using the SAE correction factor and about 12% driveline loss.
4th gear pulls also,(industry norm) 5th gear will give inflated numbers.
This is real world wheel horsepower, not some "happy" dyno numbers.
STD, uncorrected or DIN numbers will be higher.
What do I win?
John T
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Chain drive bikes average about 11-14 percent. Many conditions contribute and it is hard to put an exact figure on it.
Chain condition and tightness, tire pressure and size/weight, rear brake drag, bearing condition and even the oil used will change the numbers.
Shaft drives are usually in the 16-20% driveline loss. :conveyer:
John T
Chain condition and tightness, tire pressure and size/weight, rear brake drag, bearing condition and even the oil used will change the numbers.
Shaft drives are usually in the 16-20% driveline loss. :conveyer:
John T
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Wow,
That tells me a few things.
Stock, the fueling must have been WAY off. (probably very rich like many MV's I have seen)
After freeing up the exhaust and a proper map, it was free to run as it should.
Do you know what kind of dyno? What correction factor was used? Weather conditions of both runs? Do you have an air/fuel ratio printout? How many miles on your bike and how did you break it in? (easy/hard)
Lots of variables..........
John T
That tells me a few things.
Stock, the fueling must have been WAY off. (probably very rich like many MV's I have seen)
After freeing up the exhaust and a proper map, it was free to run as it should.
Do you know what kind of dyno? What correction factor was used? Weather conditions of both runs? Do you have an air/fuel ratio printout? How many miles on your bike and how did you break it in? (easy/hard)
Lots of variables..........
John T
What is difference between bhp and horsepower measured at the rear wheel? Superbike magazine had the Brutale 910 at 121 bhp. BTW, it looks like they put the Brutale's HP and Torque numbers on the Tuono dyno graph in that article. The number did not match the Tuono's graph and they were identicle to that of the Brutale.airfuel said:
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Oooh boy, You could write a thesis paper on horsepower, torque and the correction factors involved.anucci said:
bhp or Brake Horsepower is just power measured on a brake dyno (Prony the inventor, or the missused "pony brake")
Not sure what correction factor they used or if they even care.
Overlaying graphs is fine if they are scaled the same.... Hp and Torque should always cross at 5250rpm.
If you do a search on horsepower you will have days of reading to do.
The main thing is use the same dyno and the same correction factor.
John T
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