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That's a mock up
Today we hit 182 bhp with our test slip ons and the Rapidbike with some fuelling and ignition tweaks.
at the crank or wheel?
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Based on the fact that he wrote 182 bhp and not whp then I'm assuming he meant: the amount of power generated by a motor without taking into consideration any of the various auxiliary components that may slow down the actual speed of the motor. Sometimes referred to as pure horsepower, brake horsepower is measured within the engine's output shaft. Depending on the configuration of the engine, the point on the output shaft that is the focus of the measurement is the engine dynamometer.
jarelj
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That's a mock up
Today we hit 182 bhp with our test slip ons and the Rapidbike with some fuelling and ignition tweaks.
That's great, can you expand on the RapidBike module specifics? Was it the "Race" version, and how is it fitted to the bike? Can you post a dyno chart, I'd be curious to see the torque curve.
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I don't think the cover is for heat, its probably to cut the mechnical noise coming from the engine.
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Itching to see the finished product Rich.
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Whooo...me too!
Brake horsepower is steady state horsepower.
BHP is measured by holding to wheel or engine speed and measuring the amount of force required to stop any increase in speed.
Many people think DynoJet dyno's measure rear wheel horsepower, that is not the case.
The DynoJet software adds a correction factor that they determined by testing a 1985 VMax. The factor was used to make the calculated HP match the claimed HP for the VMax.
Yamaha claimed 145hp for the VMax.
On an engine brake dyno the number was 120hp.
On DynoJets dyno the VMax only came out at 100hp so Mark Doebek ordered the chief engineer building the first DynoJet dyno to doctor the math to make the number read 120 to match the higher number shown on the engine brake dynos.
For ever more the DynoJet dyno's have shown an inflated figure.
People think a 250i DynoJet dyno uses the eddy current brake during a dyno power run, it does not. When you press the green button to start the run the brake power is released and the dyno acts as an inertia dyno.
This is why Ducati started to quote inertia dyno figures instead of crankshaft horsepower.
They get a bigger number on a DynoJet dyno than they do on the Apicom dyno connected to a crankshaft.
The important part of dyno tuning is the before and after numbers.
The myth that DynoJet dyno's read rear wheel horsepower is simply not true.
BHP is measured by holding to wheel or engine speed and measuring the amount of force required to stop any increase in speed.
Many people think DynoJet dyno's measure rear wheel horsepower, that is not the case.
The DynoJet software adds a correction factor that they determined by testing a 1985 VMax. The factor was used to make the calculated HP match the claimed HP for the VMax.
Yamaha claimed 145hp for the VMax.
On an engine brake dyno the number was 120hp.
On DynoJets dyno the VMax only came out at 100hp so Mark Doebek ordered the chief engineer building the first DynoJet dyno to doctor the math to make the number read 120 to match the higher number shown on the engine brake dynos.
For ever more the DynoJet dyno's have shown an inflated figure.
People think a 250i DynoJet dyno uses the eddy current brake during a dyno power run, it does not. When you press the green button to start the run the brake power is released and the dyno acts as an inertia dyno.
This is why Ducati started to quote inertia dyno figures instead of crankshaft horsepower.
They get a bigger number on a DynoJet dyno than they do on the Apicom dyno connected to a crankshaft.
The important part of dyno tuning is the before and after numbers.
The myth that DynoJet dyno's read rear wheel horsepower is simply not true.
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