My thoughts exactly, I have the same intake on my 996.

Congrats

 

Nobody ever asks what is (for me neway) the most important question: In the real world how good can the small conical reusable KN filter (oiled) be compared to the oem replacable part ie: will it keep as much dirt out of the motor over time even if you service it right? Clogged MAF is only one aspect of reusable filters. Racing guys rebuild their engines regularly. Thats not on my list of things to do. Good luck with this.

 

KN claims to have no less than 99% filtration of the OEM filter. I quess it is up to the consumer to judge if it is worth it. The Oiled filters are a downside on MAF cars, but the added maintenance doesn't bother me too much.

 

I have sworn off K & N systems --after years of using them on hi/po bikes, trucks, and cars. The MAF controversy (don't need the problems!), the lesser filtering ability (an independent test of K&N's against factory paper filters indicated the K's passed more air--due to bigger holes in the filter media--but also passed more micron size dirt. 3% more, If I remember correctly. The K's ALSO pass water-- maybe not a problem in our apps-- but it is a problem on a Nissan twin turbo 300ZX that I had. Also-- in the 996/997 picture, I would be real suspicious of the very sharp bends in the intake tube-- air doesn't like to bend under high velocity. At least if you want to make ponies.

I also very much agree with the concept that Porsche does not leave anything on the table in terms of easy h/p gains. That and the fact that 355 h/p stock is enough for any of my needs (if you want the intake noise, block the resonator-- lot cheaper and you retain stock air intake), and 5-7 h/p would not even be noticed. I think these mods are done for another reason than performance gain. I DID see a major increase in fuel mileage, though, when I installed a K&N system on my 1997 Tahoe. Like 2-3 miles per gallon. But the damn system kept coming disconnected from the manifold, so I junked it. My .02........

 

It would be interesting to see what difference it would make in performance to wrap the intake tube with heat reflective tape. Anything you can do to lower the temp of the incoming air charge aids air density (the higher the air density, the more oxygen and more power!). That black tube is probably plastic and heat soaks big time. You can buy the tape at any hot rod store for a minimal price. Read an article in a Truck magazine where they gained significant intake temp reduction, confirmed by instruments-- and fuel economy and performance gains. I did this to my Tahoe installation and I'm sure that contributed to the significant measureable economy gains I enjoyed. Enjoy.....

 

From what I understand, you can see 5-10hp increases just by fussing a few variables between dyno runs. Also, even if it were there, 5-10hp would not be felt by anyone who is interested in a cold air intake, IMO. I think you do this mod for the looks and for the sound. Personally, I wouldn't do this mod, because from what I've read the increase in air flow is due to less filter. I would only look into an intake change that kept the same OEM filter. Also, the OEM box draws air from outside the engine bay...as already noted. How can you get any colder than that? However, it does look cool and probably sound great.

J

 

Yup! those intakes do look good...

 

^That does look nice.

J

 

I have considered replacing the KN with an AEM dry flow. They use a finer dust in their ISO Testing, So I believe it should filter better w/o any HP loss.

 

It looks nice. I can definitely feel the increase in response from the engine. It is not loud under normal conditions and it screams when it’s supposed to. The only thing warranty can affect is for the actual air intake part. It was easy to install and the price is right. What else can I ask for?!

 

Certainly, with this little mod, your warrantee 'll be death !
if you replace something on your car which is not approved "Porsche" or OEM item, that 'll be difficult with the guarantee.
But we take all the risk ...
V.

 

Concerning the filters. There is much threads here which speaks about it and if they knows now that it should not be replaced to have more hp (or very little), they knows that it improves the noise. It is that which I search, now if the engine breathes better, it will be +.
Wich is according to you the best solution, that which stops the dust, which lets pass less hot air and which rather easy to place, a small summary would be welcome.
Thanks a lot.
Vincent

 

I didn't place a K&N intake on my Porsche but have put one on two other cars that I own. The extra power is nice but the main benefit is the noise and possibly a tad of extra responsiveness. With the relative cheapness of the K&N compared to other options for the Porsche, if one is going to get an intake, K&N is a no brainer from my perspective.

 

[quote
if you replace something on your car which is not approved "Porsche" or OEM item, that 'll be difficult with the guarantee.
But we take all the risk ...
V.[/quote]

Yeah but had this mod on 5 of my past cars, including current one, drove one up to 130k miles (no problems because of filter).

In addition, if you have a good relationship with your dealer (albeit one that is soft on mods & warranties) should not be a problem. Even tho, the only part that would be affected by warranty would be intake....

to each his own....

 

Yeah but had this mod on 5 of my past cars, including current one, drove one up to 130k miles (no problems because of filter).

In addition, if you have a good relationship with your dealer (albeit one that is soft on mods & warranties) should not be a problem. Even tho, the only part that would be affected by warranty would be intake....

to each his own....[/quote]

Thanks to share your expérience !