K&N Poor filtering?

[speedyswede]

Originally Posted By: cfromc
Either way, colder air makes more power, about 1% for every 10F reduction.


Yea, I agree with that. The OE intake on the Volvo 240 is a fairly efficient "cold air" set-up with a preheat system. I removed the preheat tubing/thermostat/mounting bracket from the factory air box(a mass restriction in itself) and encased the air box in silver adhesive heat shielding material. I kept the OE snorkel, but I might try a larger diameter PVC tubing mod in the future. Its made a nice difference.

But on the topic of K&N...I briefly used a K&N drop-in in my old `83 245. It really didn't make the car run any better, so I took it out and sold it. A few other old Volvo owners have told me similar stories...they just don't seem beneficial in these cars.

 

[crazycrak]

Originally Posted By: rudolphna
Question. If I replaced the stock airbox with one of those cheap Ram-air pipes with a K&N filter on the end, will it have poor filtration that will be bad for my engine? I'm told that they have much worse filtration than a paper element.


If its K&N its not cheap you payed a pretty penny for it I paid close to $300 for mine
Ive got over 25K miles on mine and havent seen any problems and have notice MPG incress over stock by 3-4 mpg and the filter doesnt need to be cleaned yet

 

[rszappa1]

Could that be that a lot of the dirt went through the filter instead of being caught by it?????

 

[virginoil]

K&N is for track use not street use IMO.

 

[shokhead]

Originally Posted By: Corvette Owner
I don't know about "much" worse, but all the studies I have seen show that oiled cloth filters do not filter as well as paper, and if you over-oil them they will foul up your MAF sensor.

I also do not believe that the oil cloth filters produce any more power, although they may flow better.

I have stayed with paper filters.


Do you have links to those studies that are not 10 years old?