I had the same experience after dropping in the K&Ns -- smoother throttle response. The engine just flat out revs more freely. I might invest in a new CAI at some point but right now I feel like I don't want to fix what ain't broke.

I used K&N drop in filter and never had a problem. I don't see the logic from some of the members here....:stirthepot:

Yep! :iagree:

the stock intakes are CAIs, they just need better flowing filters, ie K&N and if you do the Modshack vent DIY you have the same benefits as the expensive long tubes.

Can you post his link? I'm lazy to search.

Modshack??? Is there a DIY??

Ummm.....That would be in the DIY section: http://www.the370z.com/diy-section-d...ur-airbox.html

K&N screwed up the MAF on my mustang. Oil.

That'll happen if you over-oil them..

I've built and sold over 1000 Airboxes for Audi's and VW's (which have particularly finicky MAFs) and not had a problem...

K&N Response to Mass Air Flow Sensor Concerns

And a little MAF cleaner every now and again helps to, I did that with my audis and plan on doing it with the Z too. Preventive maintenance.

Thanks! :tup:





That was your problem, not the K&N....

Awesome job on doing that test. 4 runs on each should leave no doubt that the filters do improve performance.

Just out of curiosity, how many miles or how dirty were the stock air filters used in this test? I assume you got the K&Ns brand new?

Drisko,
Good question, the stock filters were actually in good shape (besides a couple of bugs....). And yes, the K&N's were out of the box brand new!
ps. After 9k they still run fine and no issues with MAF...

Went ahead and ordered a pair off of EBay. Price was around $104 after 8% Bing cashback. Since I have no plans on getting an aftermarket intake, this is an easy way to improve over stock filters.

That is what I'm thinking, but let me see if I can get them cheaper. ;)

Under $104 shipped at Amazon.com. :) I should of ordered them from there, since I get free 2 Day shipping, oh well!

Linky: http://www.amazon.com/33-2399-Panel-.../dp/B001C4SL04

I got mine here:
The Z Store! Nissan-Datsun 240Z-260Z-280Z-280ZX-300ZX(Z31/Z32)-350Z-370Z Parts: SALE! K&N Performance Air Filter, 07-10 350Z/370Z
$91.75 to my door (Connecticut) for the pair.
Also added the Cobb MAF tubes.

Damn, nice price! Way cheaper than anywhere else I found.

CT
If you can install separately the filters and the Cobb tubes, let us known if you "fell" any gains with the MAF tubes once you are getting use to the filters.
Nice combination mods btw.
Phil

Will do. Car is still in winter storage. Will put it back on the street in a week or so. I did the installs, reset the ECU and started it up. Car also has Berk HFC's and Stillen CBE.

Give us a chance to beat any price.. Just send a PM..

Although would love to see the step to Gen 3's.. we get comments every day about how happy people have been with the installs..

Can't convince the financial manager to provide the funds to modify the Z. I can lable the K&N as replacement filters and she will be none the wiser.
:happydance:
Oh and by financial manager I mean wife.

All that Guy had to do is go to Walmart and buy a $2.00 can of circuit board cleaner aerosol . THEN DISCONNECT THE BATTERY. Then spray the MAF sensor area. The oil comes right off because the spray contains carbon tetrachloride. Then let it all set for about a half hour. Reconnect battery and just start the car and let it idle for several minutes.

Just bought these on sale at 370source. I put them in last night and I am VERY pleased. The sound changed a bit and brought out the grunt in the motor and matched the sound of the FI exhaust perfectly IMO. I can better hear the motor now. Only other difference able to be felt/observed is the freeing up of the high RPMs. Where the car would only agree to go smoothly to about 7k, it now freely revs to redline without hesitance. Good buy for $80 bucks.

What do you all think about the HKS drop in filter???

I looked at a filtration test/comparison between like 5 or 6 companies' air filters, K&N included, conducted on an R34, and while all averaged 4-5 hp, the levels of filtration varied greatly with HKS being the worst and K&N being second best. K&N only lost to a paper filter though, but HKS was rated as very poor for filtration. This was the usual drop in filter too, made of the same material. This made my decision a lot easier.

As it does mine. THX 6spd!!

no problem, if you do get the K&N's, youll enjoy them, i know i do!

Its good practice not to open up a brand new filter and install immediately. You should let it sit out overnight (at least one night) to dry out a bit. If k&n heavily oils their filters then maybe let it sit out for 6 months?? LOL.

I've got a set of K&N drop in filters, but I don't want to waste my stock filters just yet. I'm at 7000 miles, when is a good time to replace the stock filters with the K&N filters?

I kept mine. I put them back in whenever I go to Nissan for any service. I just don't want to give them any excuses.

After you read this.

I just checked the Maintenance Guide and our engine air filters are good for 30,000 miles. Nice. I guess I will replace it now and just keep the stock filters for any future use.

Just read this entire thread and ordered mine. Lots of great information here.

I had a $75 gift certificate to Amazon.com and couldn't think of a better way to spend it. Cost me a total of $13.88. :tup: Looking forward to getting them on the car.

Keep the stock filters for when you clean the K&N's. When you clean the K&N's, you spray cleaner all over them and then flush them out with water. Then you have to let them dry before re-oiling them. While you're waiting for them to dry out, put the stock filters back in so your car isn't grounded while waiting.

Installed these yesterday. Car feels more responsive and sounds deeper/better. Love them.

hell yeah...fuckin lamo's

I have used K&N Filters for over 20 years. I have yet to have a problem with the oiling issue. I make sure I follow the directions when reoiling the filters. In every car I've installed the drop in filter I've notice a slight improvement. In all cars I notice gas mileage improvement as well. Well worth the $50 or so per filter.

Add a free flowing exhaust and you she'll give you a little more power.

I have custom exhaust with 12" resonators and K&N drop in filters. Sounds wicked. Easy return to factory stock if I ever need to. Four bolts for the exhaust and a couple clips for the filters.

Cheap fun mods is what I want for this car. Now, my other cars are money pits. Money is no object in getting more power for those cars. It's like a huge hole in my pocket. Where did that money go? Oh... :-0 that's right... I forgot about that part.

My wife says it's always like Christmas around our house for me. I'm always getting presents delivered. He, he, he.... ;-)