Air Filter Question

[CBXRider]

The filter in my Kawasaki is red and the oil filter sz made in china on it.

 

[georgiabusa_05]

I was running a K&N filter in my 05 for years. It started running bad over time, I cleaned the filter frequently and changed the plugs but it kept surging. I finally read somewhere about the same problem and changed back to the Oem air filter and the problem was solved. To this day it is still running great after going back to the Oem filter. Almost 108000 miles on it now.

 

[Mythos]

Most likely....

I bought an OEM Yuasa battery that had "made in China" on the side of it.....honestly I was stunned reading that.....

I generally trust in aftermarket parts made in Asia. In the case of some copies, it's sad how they have driven the original manufacturer out of business. I don't see Pazzo levers for sale anymore but there are a million copies on Ebay. I bought some Chinese Pazzo copies years back and they were good. I remember a thread on here where one of our members tested fake Pazzos in a lab and concluded they were at least as good if not improved upon and they were being sold at a fraction of the cost of the genuine article. The only gripe I've had with parts from Asia is that the anodizing on aluminum parts has been off. I think there's been some movement to standardize anodizing colors over the years but I just bought some Italian parts and the blue of those doesn't match my idea of the "basic" anodized blue either. Parts from Asia generally seem to have some thought put into the fit and quality though. You have a range of prices. Go dirt cheap and you'll probably get something a little objectionable. Go a little higher in price, you might get something exactly like the genuine article. In a lot of cases, companies are probably getting the parts they sell made in China anyway.

 

[Red05]

i just run a paper towel on the inside of the air box to check for dust. the stock paper ones do the best job keeping the air-box clean. i run stock filters for every day riding and run a sprint one on the track only.

That's exactly why I changed to a DNA. The stock Suzuki filter might be great, but the original Aprilia filter does not do nearly as good a job as the DNA, judging by the cleanliness of the inside of the air box. I don't think the difference is in the fibers, but rather the tightness of the fit around the perimeter of the filter.

 

[jellyrug]

The Busa is air thirsty.
I replace my filter with OEM, every oil change.

 

[Bumblebee]

I find it interesting how Kawasaki gives a Ram air horsepower correction where other manufacturers don’t

 

[jellyrug]

I find it interesting how Kawasaki gives a Ram air horsepower correction where other manufacturers don’t

I'm not sure what you mean?
Are you saying they increase specification paper printed horsepower by adding RAM air effect at top speed?

 

[Bumblebee]

I'm not sure what you mean?
Are you saying they increase specification paper printed horsepower by adding RAM air effect at top speed?

Kawasaki advertises a ram air hp figure.

If you look in the attachment, Kawasaki rates the ram air hp...it's only 10 more hp but it is still rated....

2021 - 2022 Kawasaki ZZ-R 1400 / ZX 14R

Motorcycle Specifications Overviews and Road Tests

www.motorcyclespecs.co.za

 

[jellyrug]

Kawasaki advertises a ram air hp figure.

If you look in the attachment, Kawasaki rates the ram air hp...it's only 10 more hp but it is still rated....

2021 - 2022 Kawasaki ZZ-R 1400 / ZX 14R

Motorcycle Specifications Overviews and Road Tests

www.motorcyclespecs.co.za

Thanks, I see that now.
IMHO, that is just marketing, a nice round 10 number. The 200 if real would be dyno at the crank. The extra is a guess.

 

[Bumblebee]

Thanks, I see that now.
IMHO, that is just marketing, a nice round 10 number. The 200 if real would be dyno at the crank. The extra is a guess.

When I typed in "Kawasaki Ram air hp calculations" AI explained how Kawasaki does this....

I didn't bother to copy and paste the AI info as it was a lot.....

 

[jellyrug]

When I typed in "Kawasaki Ram air hp calculations" AI explained how Kawasaki does this....

I didn't bother to copy and paste the AI info as it was a lot.....

One could probably attempt that with math.

But here is the practical question?

At what land speed is that calculated?

At 186 mph, your 300km/h, the motor is restricted, won’t be at full power.

If the calculation is under acceleration, the RAM air won’t be a constant?

 

[Bumblebee]

One could probably attempt that with math.

But here is the practical question?

At what land speed is that calculated?

At 186 mph, your 300km/h, the motor is restricted, won’t be at full power.

If the calculation is under acceleration, the RAM air won’t be a constant?

Pretty much all I know is I like the fact Kawasaki actually takes the time to calculate ram air hp (as little as it may be).

This is what AI has to say.....


"Kawasaki, like other manufacturers, does not use a proprietary, secret formula but relies on established aerodynamic and thermodynamic principles to determine the performance gains from ram air systems. The exact power output is determined by physical testing on dynamometers under controlled conditions that simulate real-world air pressure and speed, rather than a simple paper calculation.
The calculation of ram air horsepower involves measuring the increase in air density and pressure within the airbox at speed and applying this to the engine's output."

Key Principles

• Pressure Differential: The system works by converting the kinetic energy of the forward-moving air into potential energy (static pressure) inside the airbox. The faster the motorcycle moves, the higher the pressure inside the airbox becomes relative to the ambient air pressure.
• Denser Air Charge: This pressurized, cooler air is denser and contains more oxygen, allowing the engine control unit (ECU) to add more fuel, resulting in a more powerful combustion event and increased horsepower.
• Speed Dependency: The ram air effect is negligible at low speeds and becomes significant only at very high speeds, typically over 100 mph (160 km/h).

Measurement Methods
The actual horsepower gain is not a fixed number but a variable dependent on speed. It is measured empirically:

1. Dynamometer Testing: Engineers place the motorcycle on a specialized dynamometer.
2. Simulated Airflow: High-speed fans are used to force air into the ram air intake system at specific, measured pressures and speeds, simulating different riding conditions.
3. Data Logging: Sensors inside the airbox measure the resulting pressure (boost) and the ECU adjusts fuel mapping accordingly.
4. Power Output Measurement: The increase in rear-wheel horsepower is measured directly at various speeds and pressures. A test on a Kawasaki ZX-9R, for example, showed a gain of 8 horsepower at 166 mph (267 km/h) with ram air activated.

Ultimately, Kawasaki calculates the power benefit from a combination of fluid dynamics modeling and rigorous physical testing to ensure accurate power ratings for their high-performance motorcycles.

 

[jellyrug]

Pretty much all I know is I like the fact Kawasaki actually takes the time to calculate ram air hp (as little as it may be).

This is what AI has to say.....


"Kawasaki, like other manufacturers, does not use a proprietary, secret formula but relies on established aerodynamic and thermodynamic principles to determine the performance gains from ram air systems. The exact power output is determined by physical testing on dynamometers under controlled conditions that simulate real-world air pressure and speed, rather than a simple paper calculation.
The calculation of ram air horsepower involves measuring the increase in air density and pressure within the airbox at speed and applying this to the engine's output."

Key Principles

• Pressure Differential: The system works by converting the kinetic energy of the forward-moving air into potential energy (static pressure) inside the airbox. The faster the motorcycle moves, the higher the pressure inside the airbox becomes relative to the ambient air pressure.
• Denser Air Charge: This pressurized, cooler air is denser and contains more oxygen, allowing the engine control unit (ECU) to add more fuel, resulting in a more powerful combustion event and increased horsepower.
• Speed Dependency: The ram air effect is negligible at low speeds and becomes significant only at very high speeds, typically over 100 mph (160 km/h).

Measurement Methods
The actual horsepower gain is not a fixed number but a variable dependent on speed. It is measured empirically:

1. Dynamometer Testing: Engineers place the motorcycle on a specialized dynamometer.
2. Simulated Airflow: High-speed fans are used to force air into the ram air intake system at specific, measured pressures and speeds, simulating different riding conditions.
3. Data Logging: Sensors inside the airbox measure the resulting pressure (boost) and the ECU adjusts fuel mapping accordingly.
4. Power Output Measurement: The increase in rear-wheel horsepower is measured directly at various speeds and pressures. A test on a Kawasaki ZX-9R, for example, showed a gain of 8 horsepower at 166 mph (267 km/h) with ram air activated.

Ultimately, Kawasaki calculates the power benefit from a combination of fluid dynamics modeling and rigorous physical testing to ensure accurate power ratings for their high-performance motorcycles.

Today in cycling, all serious competitive cyclists use power meters on their bikes. Either measured from the back wheel, or the pedals. Continuous display with data available after each ride for analysis.

This is not hard to do, I always wonder if there will be a market for doing this on motorcycles.

It would mean you can view instantaneous power during the ride. After the ride you would be able to see average power for the whole ride, maximum power, and more metrics.

Kind of like always having a dyno available for the entire ride.

 

[Bumblebee]

Today in cycling, all serious competitive cyclists use power meters on their bikes. Either measured from the back wheel, or the pedals. Continuous display with data available after each ride for analysis.

This is not hard to do, I always wonder if there will be a market for doing this on motorcycles.

It would mean you can view instantaneous power during the ride. After the ride you would be able to see average power for the whole ride, maximum power, and more metrics.

Kind of like always having a dyno available for the entire ride.

With all the electronics on modern bikes, this could be a viable setting....having a power output meter might be a fun thing to have...

 

[Dennis]

Today in cycling, all serious competitive cyclists use power meters on their bikes. Either measured from the back wheel, or the pedals. Continuous display with data available after each ride for analysis.

This is not hard to do, I always wonder if there will be a market for doing this on motorcycles.

It would mean you can view instantaneous power during the ride. After the ride you would be able to see average power for the whole ride, maximum power, and more metrics.

Kind of like always having a dyno available for the entire ride.

Runners put them on their shoes also. The issue I would see with doing it on a motorcycle is the increased variation in wind drag various bikes would have. The units even measure wind speed, which would be greatly impacted by what bike it's on, and where. Not so much an issue with a runner or bicyclist.

 

[jellyrug]

Runners put them on their shoes also. The issue I would see with doing it on a motorcycle is the increased variation in wind drag various bikes would have. The units even measure wind speed, which would be greatly impacted by what bike it's on, and where. Not so much an issue with a runner or bicyclist.

On bicycles, there are a few systems. There is a strain gauge in the back wheel hub, connected to the rear drive sprockets cluster and an RPM sensor. So the power measurement is 99.5% accurate as to what goes into the back wheel.

This concept on a motorcycle will be just as accurate.

I guess the question is how many people are horsepower junkies, and how big the market is.

 

[Red05]

guess the question is how many people are horsepower junkies, and how big the market is.

I rarely glance at the dash. Occasionally, to make sure the fuel light isn’t on. To me, lean angle is way more enticing than horsepower.
That said, I’d bet a lot of people would like a power meter.

 

[Bumblebee]

I rarely glance at the dash. Occasionally, to make sure the fuel light isn’t on. To me, lean angle is way more enticing than horsepower.
That said, I’d bet a lot of people would like a power meter.

I'd bet it this were available, lots of people would be surprised at how little hp they actually use on an average ride....

 

[Dennis]

On bicycles, there are a few systems. There is a strain gauge in the back wheel hub, connected to the rear drive sprockets cluster and an RPM sensor. So the power measurement is 99.5% accurate as to what goes into the back wheel.

This concept on a motorcycle will be just as accurate.

I guess the question is how many people are horsepower junkies, and how big the market is.

Yeah, direct measurement would work. Like a mini dyno. The runner's power meters aren't directly measuring.