djames

I stumbled across this site that claims HP gains of 10-12 for our cars and was curious if anyone here is familiar with this or tried it out.

http://www.evoms.com/marketplace/vie...-28596EBE76FC}

I'm not considering it for my car, just curious as to whether or not it works as advertised.

Mark in Baltimore

K&N "Filtercharger". Boogey.

Steve Weiner-Rennsport Systems

I'll do one up from Mark; I call "horsepucky" on those claims.

tjangi

I found this instead...

Bob Rouleau

You can get a small power gain by drilling a half dozen one inch holes in the airbox cover. This was tested by Bruce Anderson, confirmed at Tech Tactics and published in Panorama. He also dyno tested the engine with NO AIR FILTER at all and got zero gain. The 993 air intake was restricted due to noise regulations. Adding holes does improve sound and gets a few more HP at high RPM. The K&N etc. are pure nonsense.

Falcondrivr

I too doubt that the K&N adds power. However, all the mechanics I've talked to about it have said it is superior technology for filtering particles.

IXLR8

Ask them where that 10-12 HP gain is...somewhere useful or up in outer space.

You see countless companies making claims, especially those aftermarket exhaust manufacturers (same goes for those battery charger manufacturers .

I subscribe to a quality motorcycle magazine who periodically picks a bike and tests about 10 aftermarket exhaust systems and compares the power and torque curves to stock curves. You know what...none of the aftermarket exhausts are of any benefit. They have a spike HP gain up at a kazillion RPM hardly worth talking about, but lookie down below where we usually use our engines...the same or usually less HP and torque. What a waste of money!

IXLR8

Does K&N provide specifications of what their filter filters when new and after the tenth washing?

I've never had a high opinion of them simply because I can't verify their performance after X washings.

Mark in Baltimore

K&N=snake oil in a foam box

diet97993

Hmmmm.... how many stock filters can you buy for $349.00.

1pcarnut

Looked into K&N many years ago for my motorcycles. The K&N simply flows more air by not filtering down to a smaller micron size than the factory elements, plain and simple. You WILL get more dirt particles going in to your motor. One of the board members on the mc forum I frequented was responsible for maintenance on a large fleet of earth moving equipment with rigid service requirements for the motors. They kept very accurate data on engine life and service costs (air filters, oil filters etc). Their conclusion was that the K&N reduced engine service life. They returned to the paper element filters.


If you value longevity of your motor, do NOT put in a K&N.

Stuttgart951

+1

993_Pilot

Now that is interesting !

beentherebaby

It does not matter how much potential airflow an air filter has, what matters is if the existing air filter causes a flow restriction in the induction system. Porsche air filter systems are pretty efficient - by design. I've never seen any power gains with K&N or other aftermarket filters on Porsches. As noted complete removal of the air filter often shows zero improvement in power.

Typically manufacturers use results based on some horrible OE system as a basis for their performance comparisons even though they may not apply to most applications.

Speedyellow993

I know the oil from the K&Ns create issues with the 996MAFS. 993s are happy with the Factory filter.