K&N Air Filter Queries and Doubts

[sniper]

Re: K&N Air Filter Queries and Doubts

Stock filters have an additional task besides that of filteration. Its reducing the intake noise caused by the movement of air rushing into the engine. This is achieved by making the intake pipes narrow and using extremely fine filtration material which literally chokes the engine from producing more power and giving better fuel efficiency for the sake of the Noise Pollution norms. If not for these norms, companies would have sold cars/ bikes with factory fitted FFFs. FFF manufacturers have their filteration test data on their websites just like the 'independent researchers' do, both are equally believable. Only difference is that there is more at stake for the manufacturers who can be sued for their claims. We just believe the one we WANT to believe in..

[dustom_99]

Re: K&N Air Filter Queries and Doubts

A free flow filter's (FFF)job is to let more air pass through itself while filtering it well. That increases the power output of an engine provided the installer has fitted it right & adjusted the fuel-air ratio correctly. Most bad experiences related to FFFs can be traced back to improper installations, wrong or no jetting & improper cleaning of the filters. This forum intends to clear doubts and misconceptions about FFFs which are the most popular performance upgrades.

Filtering something is a relative term. Some would tie a Cotton rag over Intake and Think it is a Filter. well actually it is , It keeps out relatively larger particles , but permits much smaller ones.
On K&N - There was an independent research published , where in Lot of standard and FF Filters were tested for Performance and Filtering efficiency .
Most aftermarket free flow did better on Engine performance but failed Miserably on Filtering efficiency , letting in dust and particles into the engine which would have been captured by standard OEM filters. I remember K&N was second to bottom.

There is no Magic wand for letting more air into an Engine. Either increase surface area of filter used keeping filtering efficiency same , or lower the filteration itself , by having bigger openings than OEM filters.
Since aftermarket Fitlet companies do not have to deal with Engine warranty , they have no problem pushing their products in market.
Everyone loves more power from engines , Manufacturers too . If K&N or other cotton filters were as good as paper type ones , manufacturers would use them as OEM.

[abhiwltya]

Re: K&N Air Filter Queries and Doubts

Hello friends.
I own royal enfield C350 2014 model.
I am thinking about fitting my bike with pipercross or BMC air filter.
According to the specifications of AM air filter, performance AF intakes more quantity of pure air as compared to stock air filter.
So, engine will run on good combustion of fuel hence resulting in better power and maintaining the engine on better side.
But, as carburetor will suck more air, appropriate quantity of fuel is to be injected in the cylinder to maintain proper AF ratio.
To be more clear, if my engine is running on 15:1 AF ratio on stock airfilter, then that ratio is to be manipulated with the AM airfilter.
So the question which arises here is rejetting the carburetor will do the work or changing the carburetor settings?
Because both the settings is going to meter the quantity of fuel injected into the engine cylinder.
Please help me guys.
Also better combustion of fuel means better fuel economy, is this true?
I don't expect better FE, but it shouldn't at least alter the present FE.

I am running on k&n for a year now on my NS.Some personal observations and views-
Air carries fuel while travelling through the carb from small holes, now more air automatically mean that it will carry more fuel.But the increase in fuel <increase in air.Hence the need for stabilizing the af ratio.
What has helped me loads is to understand how your acclerator inputs feel.REMEMBER TO DIFFERENTIATE BETWEEN ACCELERATOR INPUTS AND ENGINE POWER, I AM TALKING ABOUT RESPONSIVENESS AND NOT SHEAR PULLING POWER.Learn how engine response feels on stock air filter, I.e. on opening throttle 10,20,40,50,70,100 percent etc..once you have paid enough attention to this on stock filter, change to AM and without any other changes, compare the throttle response.In my case I found the throttle response on higher rpms remains adequate/slightly better.So I tuned the afr screw (many advised rejetting but I was hell bent on understanding how all this worls) and rode it again trying to figure out the throttle responses.After 5-6 iterations I found that below 4k rpm the throttle responses have improved over the stock and on higher rpms I never felt that the response have dulled.So with this set up i have been riding for over a year, without rejetting and everything has gone as expected.No problems whatsoever with plugs etc.
The info Might help you.


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[Pizzaboi]

Re: K&amp;N Air Filter Queries and Doubts

A free flow filter's (FFF)job is to let more air pass through itself while filtering it well. That increases the power output of an engine provided the installer has fitted it right & adjusted the fuel-air ratio correctly. Most bad experiences related to FFFs can be traced back to improper installations, wrong or no jetting & improper cleaning of the filters. This forum intends to clear doubts and misconceptions about FFFs which are the most popular performance upgrades.

I don't know about performance gains but I have usually had FE gains when I switched to a FFF, regardless of the brand. I have never had a issue with burnt valves or dirt entering the engine and I have definitely not had a seized engine As [MENTION=6066]sniper[/MENTION] said a FFF which is properly installed and maintained will give you zero issues.

An FFF definitely means an engine that is cleaner cooler and more more fuel efficient

[punisherkunal]

Re: K&amp;N Air Filter Queries and Doubts

Hello friends.
I own royal enfield C350 2014 model.
I am thinking about fitting my bike with pipercross or BMC air filter.
According to the specifications of AM air filter, performance AF intakes more quantity of pure air as compared to stock air filter.
So, engine will run on good combustion of fuel hence resulting in better power and maintaining the engine on better side.
But, as carburetor will suck more air, appropriate quantity of fuel is to be injected in the cylinder to maintain proper AF ratio.
To be more clear, if my engine is running on 15:1 AF ratio on stock airfilter, then that ratio is to be manipulated with the AM airfilter.
So the question which arises here is rejetting the carburetor will do the work or changing the carburetor settings?
Because both the settings is going to meter the quantity of fuel injected into the engine cylinder.
Please help me guys.
Also better combustion of fuel means better fuel economy, is this true?
I don't expect better FE, but it shouldn't at least alter the present FE.

[nadz11.ns]

Re: K&amp;N Air Filter Queries and Doubts

Will I Experience Marginal Improvement In My Scooty's Performance ?

No you won't, except change in sound.

[Saurabh213]

Re: K&amp;N Air Filter Queries and Doubts

Atleast for these questions, you should do some searching by yourself.
Google your queries first and get an idea of what to expect and only then xBhp members can help you.


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Will I Experience Marginal Improvement In My Scooty's Performance ?

[abhi7013]

Re: K&amp;N Air Filter Queries and Doubts

A free flow filter's (FFF)job is to let more air pass through itself while filtering it well. That increases the power output of an engine provided the installer has fitted it right & adjusted the fuel-air ratio correctly. Most bad experiences related to FFFs can be traced back to improper installations, wrong or no jetting & improper cleaning of the filters. This forum intends to clear doubts and misconceptions about FFFs which are the most popular performance upgrades.

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Well, the topic was just K&N filters, so I said regarding only that. Cause the quality of a K&N filter is way more low than a stock one. Obviously taking out the thread is no solution but again, what I feel us,.people have to be educated first about the effects and later allowed to decide. Not the other way around. Which is happening a lot as I can see.
What a free flow filter is meant to do, even I know bro. I was talkin with regard to K&N only. Not generalizing. If you felt so, then apologies.
By filters, I meant k&n ones. Anyways, cheers!

Sent from my MT27i using xBhp Connect mobile app

[sniper]

Re: K&amp;N Air Filter Queries and Doubts

How To Tune Carb After Installing The FIlter ?
What Is Jetting ? Do We Need To Make The Mix More Rich Or Lean ??

Jetting is best left to experts but finding out if your engine is running lean is comparatively easy. If your spark plug electrode is all white like someone coated it with talcum powder then its running lean, not a good sign. Spark plug color charts are easily available online and its a great way to check your engine's health.
Installation of FFFs usually leans out the air-fuel ratio which means there is now more air than required in the ratio. This causes overheating and accelerates engine wear. Jetting is the process of correcting this ratio imbalance and bring it back to ideal. This is done by increasing the amount of fuel going into the mixture.

[nadz11.ns]

Re: K&amp;N Air Filter Queries and Doubts

How To Tune Carb After Installing The FIlter ?
What Is Jetting ? Do We Need To Make The Mix More Rich Or Lean ??

Atleast for these questions, you should do some searching by yourself.
Google your queries first and get an idea of what to expect and only then xBhp members can help you.


Sent from my iPad using Tapatalk

[Saurabh213]

Re: K&amp;N Air Filter Queries and Doubts

I think the K&N model R1100 will fit better on your carb as it has a smaller mouth as compared to a RC1060. Jetting will definitely be needed.

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How To Tune Carb After Installing The FIlter ?
What Is Jetting ? Do We Need To Make The Mix More Rich Or Lean ??

[sniper]

Re: K&amp;N Air Filter Queries and Doubts

If filters do more bad than good, I guess there's no point of this thread. Just my opinion after looking at the experiences of others and myself.

Sent from my MT27i using xBhp Connect mobile app

A free flow filter's (FFF)job is to let more air pass through itself while filtering it well. That increases the power output of an engine provided the installer has fitted it right & adjusted the fuel-air ratio correctly. Most bad experiences related to FFFs can be traced back to improper installations, wrong or no jetting & improper cleaning of the filters. This forum intends to clear doubts and misconceptions about FFFs which are the most popular performance upgrades.

[sniper]

Re: K&amp;N Air Filter Queries and Doubts

Pls Help Me With The Above Posts[/QUOTE]

I think the K&N model R1100 will fit better on your carb as it has a smaller mouth as compared to a RC1060. Jetting will definitely be needed.

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[abhi7013]

Re: K&amp;N Air Filter Queries and Doubts

If filters do more bad than good, I guess there's no point of this thread. Just my opinion after looking at the experiences of others and myself.

Sent from my MT27i using xBhp Connect mobile app

[Saurabh213]

Re: K&amp;N Air Filter Queries and Doubts

IMO Aftermarket Air Filters are NOT advisable. Even I had a K&N air filter RC1060 on my Honda Dio 2012 but I removed it as it affects the engine negatively in a long run. It cut shorts the life of an engine. After all what's a bike without a proper engine?
Think about it.
Stay Stock.
Happy Biking !! :thumbup:

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Pls Help Me With The Above Posts