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K&N air filter need help


procharger

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  • 4 weeks later...
Posted

I'm sure there is a power advantage but you won't be able to notice it without some sophisticated equipment.

 

The advantage for me is I will never need to buy another filter.

Posted

One time I tried a K&N in an airhead BMW.

 

Went out and did back to back timed roll-ons. Zero measurable difference.

 

Unless the stock filter setup is especially lousy, I would not expect any noticable performance gain.

 

BTW, my plane came with a JR Filter that seems very similar in concept to the K&N. Just wash and lube it annually and it's good to go.

 

Stock photo:

 

FR-08001-2.jpg

Posted

In my 1991 Dodge Stealth Turbo. there was (is) an outfit in Texas that dyno'd some performance enhancements they sold. Their induction kit, which included the K&N, was good for 12 HP on my 300HP engine. But that was more than just a filter. I remember they said the filter alone was good for 6 HP.

 

So, using a direct relationship of 6HP/300HP = xHP/100HP (which probably doesn't apply here) you get a 2 HP increase for the CT. Since we never turn the 5800 RPM needed to generate 100 HP, the increase is even less.

 

So, convert to K&N but don't do it for power.

Posted

I am a little wary of K&Ns. Maybe they are OK for airplanes since they are not on the ground very long, but I have a friend who was a Ford master mechanic for a local car dealer and he said the K&Ns don't seem to filter very well. He said he saw many examples where the turbos on diesel pickups failed with K&N filters in place. It appeared the compressor wheel vanes were eroded by particles passing through the filter, which thinned the vanes to failure. This is all anecdotal, but it was based on his observations at the dealership. He recommended not to buy a vehicle that had K&N filters. Ok, my flame suit is on...

Posted

Glenn,

 

That's the general position of the BMW motorcycle owners.

 

You get more flow at the expense of larger particles passing through, it would seem.

 

As a control, when I compared the K&N with the factory pleated paper element on my R100GS, I also tried a run sans filter.

 

Guess what? No measurable difference.

 

For the most part, factory specified filters flow air just fine. If significant hp gains could be had so simply and easily with no downside, don't you think they'd do it?

Posted

Wrong? I represent that! :blink: Just like I have never been lost. There were just a few times I didn't know where I was. That's not true either. I knew I was in AK. :D

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