Nissan 370Z Forum - 370Z K&N Dual Air Filter

Nissan 370Z Forum (http://www.the370z.com/)

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- - 370Z K&N Dual Air Filter (http://www.the370z.com/intake-exhaust/5660-370z-k-n-dual-air-filter.html)

Dyno results: Stock vs K&N filters!

Quote:

Originally Posted by Josh@STILLEN (Post 93925)

While Nissan has definitely built a great platform, there are gains to be had from aftermarket products, including the intake system, our Gen 3 Intake having notable success in increasing horsepower, and making a noticeable improvement in acceleration along with transforming the sound from the intake, especially at high RPMs.

A quick search of the forums for dyno results on the Gen 3 Intake should give you some independent results from forum members here, some of whom have spent a small fortune for the good of the boards documenting their installs and resulting performance gains.

On the K&N side, we've been using these filters with our intake systems since the beginning, and sold countless panel filters, and have had exactly ZERO problems related to MAFs, oil, etc. K&N has been hit with a myriad of claims, most of which can be attributed to 'internet rumor', so much so that they set up a division and research arm within the company to attempt to combat these (largely unsubstantiated) internet claims.

Also keep in mind that normal cleaning procedures for panel filters is 50,000 miles, and conical filters used with air intakes is 50,000-100,000. We recommend 50,000 miles between cleanings. Even if gains are minimal on a panel filter, the convenience of not purchasing paper filters more than offsets the cost of the K&N, and in actuality, probably the Gen 3 Intakes if you consider the life of the vehicle.

Lots of interesting comments on that topic.

So I decided to test the K&N drop-in filters to the Dyno shop tonight and do a simple comparaison test versus the stock filters. I will upload the sheets as soon as my %?&*" (slow) internet connection is done downloading them...

All runs were done without any changes to the car (besides the drop-ins) and were taken less than 20 minutes aparts on a DynoPack about 2 hours ago.

We did 4 runs on stock and 4 runs with the K&Ns.

so what were the results? You can tell us then post the sheets later.

Here they are on run #3 comparaison:

Results... run #4

ps. Can someone tell me how to insert the image instead of having attachments???

I will also send WHP sheets...

looks about right to me, a few hp gains here and there and I didnt see any loses and Im sure better throttle response too. So what I would expect from drop ins, which is what Im doing. Have them on order already.

Human feedbacks...

Although the numbers do show a gain thrughout the RPM band, i couldn't feel any difference coming back home at WOT.
That being said, the engine "seems" to flow more fluently (especialy during downshifts).
Question for the techs folks: could the K&N oil affect the maf sensors and therefore changing the air/fuel ratio??? The filters were "out of the box"...:rolleyes:

Quote:

Originally Posted by Zsteve (Post 244713)

That what exactly my goal... for 68can$x2 (including installation!!!). In US $ this is around 100$ and has no affect/questions from my dealer...

not bad gains considering it was air filters....
i think it turned out well !!

oh, and here

http://www.the370z.com/attachments/n...q_whp_run3.jpg

http://www.the370z.com/attachments/n...l_whp_run4.jpg

K&N got hit with some bad internet stigma of "i know a guy, and his MAFs got messed up", and unfortunately that has plagued them.

They have an entire department set up to try and fail MAFs with oil, and have even gone so far as to have staff on hand to help with dealership issues if there is in fact a claim of the K&N's causing an issue..

.. none to date

K&N Consumer Protection Pledge

There's a ton of info here.. including testing

Quote:

Originally Posted by Josh@STILLEN (Post 244787)

Josh
Very interesting indeed. Thx for the info.

Quote:

Originally Posted by Philipp (Post 244805)

Josh
Very interesting indeed. Thx for the info.

In addition to Josh's comments and the linked info, I've built over 1000 K&N based intake systems for Audi's and VW's over the years. Never a problem with MAF's (and the Audi type is much more sensitive than the Z style). Internet myths die hard... A problem can arise when the owner performs his first service and over-oils the filter. This is not common but it does happen when the instructions arent followed..

I've used oiled cone filters (including foam type) on na, turbo, and supercharged cars and drop-ins for that matter on number of cars in the past with no issue. :)

ive used the K&N(oiled) and currently the HKS( dry) filters in my car, no problem with either

I did the same (using K&N) on my previous cars and had no issues. My goal was to confirm if there was any gains or loss over the OEM air filters. Here's the charts on torque numbers (runs #3 & #4).

ps. Did anyone else noticed the drop around 4250RPM and what is it the cause?

Philipp, thanks for your efforts. Your dyno tests have made up my mind on the set up for my ordered Z. It's Stillen CBE and K&N drop in filters and nothing else. This combination should give me a 16-20 HP gain over stock with no warranty issues and that's the peace of mind I'm looking for!