DO K&N AIR FILTERS really give u more HP

nismown3d · Posted: Fri Nov 06, 2009 11:21 am Post subject:

I've seen n/a cars actually lose HP as well with intake systems. Usually you want to stick to higher end intake systems that are properly tuned like HKS, Greddy, Apexi, etc. I'm not a big fan of K&N filters, any filter you need to clean will always be more restrictive after you clean it than when it was brand new. The HKS filters are the best, it has a velocity stack in the mushroom assembly, and you just replace the whole filter element instead of cleaning it.

Usually any car with forced induction you'll see the biggest hp gains.

thegtiman · Posted: Fri Nov 06, 2009 5:27 pm Post subject:

red bwoy · Posted: Sat Nov 07, 2009 10:11 pm Post subject:

i think a lot of ppl missed one important fact in most tests by companies with panel or free flow filters most vehicles actually loose HP at low revs but gain appreciably at high rpm's i can attest to this my familia has an engine rated at 130 bhp i've never dynoed but with my oe filter i never crossed 175kms on the k&n panel filter i cross 175 with ease and actually feel a better pull at higher rpms with the K&N

W2J · Posted: Tue Nov 10, 2009 11:14 pm Post subject:

A engine is a pump the more air you get in and the faster you get it out the more power you will make of course once you have the supporting mods. But we are not talking about adjusting fuel and ignition curves, my belief and experience being on the dyno and off you do make more power by adding a KN drop in over the conventional paper element, if you wish to see I have a simple machine supplied by KN which can be calibrated to show the differences, you are all free to come and see.

Gerrard

rjaggs · Posted: Wed Nov 11, 2009 10:00 am Post subject:

i bought my car with the stock intake and paper filter, eventually i installed a short ram intake which i used for about a year and a half. I recently reinstalled the stock intake with a K&N drop in, and the three scenarios yielded noticeably different results. Obviously the worst option was the paper filter, even when it was new it couldn't compare to the K&N drop in. The SRI gave better top end performance especially when vvt engages. The drop in resulted in better low down performance but lost out at higher rpms.

All in all i am pretty satisfied with the k&n drop in for the 'colder air' pulling from the front of the car as opposed to the short ram.......that is until i decide to install a CAI.