Zorro Posted May 18, 2010 Report Share Posted May 18, 2010 Is it a waste of money to replace an OEM air filter with a brand new K/N air filter when everything else (map/exhaust) is stock?Thanks in advance! Quote Link to comment Share on other sites More sharing options...
MidgetTodd Posted May 18, 2010 Report Share Posted May 18, 2010 It's a waste even when modified. OEM will flow more air than that small of a motor is even capable of using. And lots of dyno tests have even shown lost HP from switching to high flow filters, something to do with too much turbulence in the air box and TB's Quote Link to comment Share on other sites More sharing options...
Zorro Posted May 18, 2010 Author Report Share Posted May 18, 2010 It's a waste even when modified. OEM will flow more air than that small of a motor is even capable of using. And lots of dyno tests have even shown lost HP from switching to high flow filters, something to do with too much turbulence in the air box and TB'sthank you. Quote Link to comment Share on other sites More sharing options...
AOW Posted May 19, 2010 Report Share Posted May 19, 2010 although from the $$$ perspective, since the K&N is guaranteed for a million miles or something, it may be cheaper in the long run when compared to cost to replace stock with stock. Quote Link to comment Share on other sites More sharing options...
MidgetTodd Posted May 19, 2010 Report Share Posted May 19, 2010 Other may vary but I've never owned a bike long enough to need to replace the airfilter. Quote Link to comment Share on other sites More sharing options...
CBRGuy Posted May 19, 2010 Report Share Posted May 19, 2010 I agree. It's a waste of money. The OE air filter will flow more than enough air and is designed for certain airflow characteristics. You may actually lose power with one of the high-performance filters. It's very hard to beat all the engineering that when into the stock air box and filter. Quote Link to comment Share on other sites More sharing options...
buxnut Posted May 19, 2010 Report Share Posted May 19, 2010 What about a pleated paper filter versus a foam filter. My Virago has a foam filter righ now. I have no idea how old it is, all I do know is that it needs to be cleaned and or replaced. I went to the Pony today and bought a pleated paper filter to replace it with. Will this change the performance any? Quote Link to comment Share on other sites More sharing options...
ponyjr Posted May 19, 2010 Report Share Posted May 19, 2010 I'm a big believer in K&N filters. I have had one in every car or truck i have ever owned. With no issues from any of them. I have also noticed performance increases and better MPG's in all but one, my 2002 jeep 4.0L. I just last week put one on my 06 mustang and 03 powerstroke. This winter i installed on on my VFR and my grizzly. Quote Link to comment Share on other sites More sharing options...
ponyjr Posted May 19, 2010 Report Share Posted May 19, 2010 What about a pleated paper filter versus a foam filter. My Virago has a foam filter righ now. I have no idea how old it is, all I do know is that it needs to be cleaned and or replaced. I went to the Pony today and bought a pleated paper filter to replace it with. Will this change the performance any?On a bone stock bike you would not notice the difference between the two. Going by the research the foam will out flow a paper while having simular filtering abilities. the foam ones should have to be oiled though, if it wasn't oiled it will just suck dirt. The oil is sticky to stop the dirt. If you just want a regular air filter i'd opt for the paper just because they are less messy. Quote Link to comment Share on other sites More sharing options...
gixxie750 Posted May 19, 2010 Report Share Posted May 19, 2010 I have a hard time with all this. I use K&N on everything also. I just dont understand how a better flowing filter can hurt. But like it was mentioned i never keep the bike long so i never worry about filter changes or cleaning either. EVERY race bike i have bought had a K&N or another aftermarket filter. Who knows unless you dyno it in the exact same day at the same temps and blah blah lol. If nothing else the K&N is cool looking(not that u can see it). Quote Link to comment Share on other sites More sharing options...
Radio Flyer Posted May 19, 2010 Report Share Posted May 19, 2010 I use a BMC filter in my SV. Quote Link to comment Share on other sites More sharing options...
ohdaho Posted May 19, 2010 Report Share Posted May 19, 2010 It's a waste even when modified. OEM will flow more air than that small of a motor is even capable of using. And lots of dyno tests have even shown lost HP from switching to high flow filters, something to do with too much turbulence in the air box and TB'sI find this hard to believe since the mass flow rates are at such a low speed. Not saying its not plausible...just hard to believe initially. Theres tons of engineers on this board...someone can prolly draw up a quick CAD in NASTRAN and run some CFD in no time. Quote Link to comment Share on other sites More sharing options...
MidgetTodd Posted May 19, 2010 Report Share Posted May 19, 2010 I'm a big believer in K&N filters. I have had one in every car or truck i have ever owned. With no issues from any of them. I have also noticed performance increases and better MPG's in all but one, my 2002 jeep 4.0L. I just last week put one on my 06 mustang and 03 powerstroke. This winter i installed on on my VFR and my grizzly.In a car yes, sportbike no.I find this hard to believe since the mass flow rates are at such a low speed. Not saying its not plausible...just hard to believe initially. Theres tons of engineers on this board...someone can prolly draw up a quick CAD in NASTRAN and run some CFD in no time.Do a google search those have been done and the info is out there. Quote Link to comment Share on other sites More sharing options...
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