Cold Air Kit - Page 3 - 6SpeedOnline - Porsche Forum and Luxury Car Resource

#31

11-01-2007, 08:32 AM

phaphaphooey

Registered User

Join Date: Aug 2006

Location: Tennessee

Posts: 328

Rep Power: 52

phaphaphooey has a reputation beyond repute

Quote:

Originally Posted by auto-xr

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.

In regards to the Maf issues, although many swear that oil based filters have fouled their Mafs, K&N adamently denies that their filters are the cause. They have a great volume of empirical data on their page detailing studies on various supposedly fouled mafs that they have received that, if their testing methods are sound, seemd to be convincing. That can be found here: http://www.knfilters.com/MAF/MAFTestresults.htm. Here is some more information: http://www.knfilters.com/MAF/massair.htm and http://www.knfilters.com/MAF/massairfindings.htm. I wonder if what K&N claims is actually true, and the vast majority of the failures are due to other sources or are not even failures at all. Who knows.

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.

Reply