K & N air filter

[Wreford Miles]

Richie Moore has sent me some dyno reports for an R100 R which shows seperate before and after for his omega pistons and his filter mod which uses a K&N and his short skirt pistons and long rods.

It;s very impresive stuff and when I get my scanner working I'll post them.

The filter mod shows and increase in bhp and torque across the range - bhp being between 2 and 3 BHP

I

 

[mikyh]

Probably not for everyone

I guess that for a standard motor it's not gainfull, but for a modified one probably is.
There' too much use of K&N filters in motorsport, and not everyone is stupid.

Regarding the costs - as you dont need to clean it often, long term it's cheaper.

I have 2 bikes with K&Ns and after some years the bottle of cleaner and the bottle of oil are still almost full.

MattW, My Mini was like a racecar, with very sharp handling and prone to oversteerng.I had a relatively short gearing so the throttle response was thrilling. You had to be strong to wrestle the wheel.
After 5 years I got tired of tending to it for a few hours almost every weekend...
Miky

 

[Steptoe]

They're crap - and so are minis

 

[MattW]

They're crap - and so are minis

Burn the heretic!

No argument regarding the filters and though it pains me to say it, you're probably right about the mini's too - I had a go in a friends 'hot' mini a couple of months ago. Brought back a lot of memories but the intervening 20 odd years since I had mine has spoiled me - I couldn't ignore the almost complete lack of suspension, the noise, the short gearing, the coarse (though powerful) engine and the complete lack of comfort. Fun when you're 19 though

 

[Beemerboff]

The air cleaner for my VFR was $128- last time I asked, $68- more expensive than the K & N and they flung in a jet and needle kit to go with it for the $60.The filter was pre oiled, and there was a bottle of oil in the box too. I've cleaned it once in 75000 km, or probably around 1000 hrs of engine time. Air box was as clean as a whistle, engine uses virtually no oil and valve clearances unchanged in 120,000 km.

Bike went better after the K&N and carb kit was fitted, but how much was due to the jet kit who knows.

Most tests I have read dont go on for long, two or three hrs is more typical

Real world for a filter is rain, hail ,snow and sleet, fine bull dust from a bone dry desert track, clouds of billowing top soil in a drout, and the fine black detritus of civilisation at all times. The K&N copes with this well.

None of this seems to get into the so called tests - they dont usually tell you how they oiled the filter, or how long the test lasts for, etc, etc. they simply are not a credible test.

I am a fan of Dave Visard too. He has done some good work on small block Chevs too, and the 350 I had in my old Holden ute was fettled using his How to build Horsepower books, and everything turned out just the way he said it would. I cant believe that just about the only thing that he ever got wrong was recommending K& N filters.