K&N Drop-ins?
 

Hey guys, I'm looking to add a little bit more power to my car and I'm considering picking up the K&N drop-ins. How do they perform on the 370? I had them on my 350 and I was satisfied.

Three things to consider: 1) dynos show that they don't add any power; 2) Many owners stay away from oiled air filters; 3) bob the oil guy has tested K&N filters and while they flow better than other filters they aren't very good at filtering the air.

Kind of hard to stay away from oiled filters when you change out for a CAI, since most of them use an oiled filter of some sort =/

I wouldn't really expect any. The stock box is pretty good already. Best to Save up and buy a real intake that will make a difference..

For those looking for a non-oiled filter, this company has a great reputation. They make a very nice intake for the 370Z, also.



R2C Performance ... World-Class HIgh-Performance Intake Systems & Filters

Thanks for the input so far guys. So there is no discernable gain from the drop-ins at all then?

I have them in mine, I don't feel any power but the response is better. For the price I am happy with the result.

Just dynoed Stock vs K&N
 

Refer to existing thread on same topic for HP dyno results...

Just coming back from the dyno shop!

http://www.the370z.com/nissan-370z-g...ir-filter.html

Any difference in sound under acceleration? I am considering AFE dry replacement filters for mine.

At WOT I do feel/hear a difference... however this could be only a placebo effect. The most sensible aspect is the engine smoothness while downshifting. Definitively a nice & cheap addition to the car!

Injen CAI use unoiled filters.

look in the general discusiion area, a guy there did a before and after dyno with K&N drop ins. Got about 4-5 hp gains at different rpms but no loses. So for $100 bucks you cant go wrong as you will also get better throttle response. Also if you get a CBE and do the UpRev tune later, the tune will probably figure in the different intake airflow (and exhuast too) and do even better. Id love to see a before dyno on a stock car then a dyno on the stock car with only the K&Ns with a UpRev tune (tuned for only the new filters) to see if the tune would improve the intake even more.

That's exactly my short terms plans i.e. CBE & Tune... just waiting to get the Cobb (or others) there mapping corrected!

Maybe the hp gain is negligible, but MPG-wise, it's alright. I used to get 11-12 days from a tankful; since I dropped a K&N in, I'm getting a full two weeks' worth. I must admit I didn't notice a power gain, but in these times of expensive gas, a couple or three extra days on a tankfull is O.K. with me. BTW, I paid $60.00 for my drop in filter. I guess the $100.00 you spent refer to a "cone-shaped" one.

I could only find them for about $54 each. Where did you get yours from?

You wont notice 4 to 5 hp gains on the butt dyno but do you feel the throttle response is better? Plus when you get the CGE the better flowing intake will help the exhaust too.