Cold Air Kit
#31
Looking at the K&N set up, it looks to be positioned right under the engine lid fan. I have heard that this unit just sucks up hot air from the engine compartment (thus hurting HP) and that dynos aren't really giving a true indication of what the K&N is doing to increase power because there may or may not be a fan blowing on the engine. In normal operation when the engine fan is on, wouldn't the K&N be receiving cool air from the outside forced on to it? Isn't that a good thing? Also, I also have read that there is a mod to turn that fan on manually (w/o affecting the automatic function) to help cool down the engine when it's being run hard. Wouldn't this be a no brainer mod to go along with the K&N? MAF issues aside (and I've read the EVO units aren't always immune to this), wouldn't this be a an design advantage over the evo unit when used on a clear on sunny day? Also, I have read that there is a rain shield but I don't think I've ever seen it. Does anyone have a pic of how K&N unit looks with it on? BTW...I don't have a CAI but I've toyed with the idea of getting one. I actually have a flat K&N filter new and in the box but as with the cone filter, the MAF issue does concern me along with the fact that the K&N flows more air thus could let more pollutants into the engine. Just using the regular air filter at this point. Curious to see what others have to say.
Additionally, the umbrella/dry sock thing that slips over the filter is blue in color I believe. If you look at the install instructions on the K&N page, I believe their finished product picture shows the filter with the water shield installed.
I hope this has been helpful.
#32
Important point: Make sure you disconnect the negative battery cable first for about 2 hours, then install the K&N and reconnect battery cable and drive it pretty hard for about 30 minutes to reset computer to compensate for the extra air.
Everyone I know that has done this has not had any problems with the MAF.
This is what I got from my research here and my talks with Porsche mechanics.
#33
I'm really thinking about it. I'd probably clean the filter off and then reapply the oil myself in addition to pulling the battery connector during installation. I'd also do the manual engine fan switch as well. It's kind of like a "ram air" thing but the car doesn't have to move to get the benefits.
Here's another question. What is the weight difference between the stock airbox setup and the K&N? I have to think the K&N would be lighter.
Anyone have a K&N CAI that they hate? If so, and you want to get rid of that piece of garbage please PM me. I'll take it if the price is right.
Here's another question. What is the weight difference between the stock airbox setup and the K&N? I have to think the K&N would be lighter.
Anyone have a K&N CAI that they hate? If so, and you want to get rid of that piece of garbage please PM me. I'll take it if the price is right.
Last edited by auto-xr; 11-02-2007 at 10:20 AM. Reason: more info
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