I just put on a K&N cylidrical air filter, and it rocks! The sound of the engine is amazing now, especially through the 4500-6500 RPM range, and anytime at wide open throttle. I went with a RU-2820 and it fits great. Thanks for all your help with my relentless questions!


Just some things I learned...
Before you've already started taking the airbox out, remember to get nuts for the bolts that originally bolted into the airbox, so that you can put on the MAF adapter.
If you decide to use the original bolts for the MAF, the nuts will have to be metric, 6mm-1.

Also, beware of the original air intake inlet, it's tough to get out without going at it from up underneath the car.

 

Where did you get this from?

 

I asked in a thread awhile back about what size air filter would be best, and someone recommended the K&N RU-2820. It's 6" long and I think has a 4.5" diameter, so it's pretty big. I got it on ebay. You can get them anywhere, though.

 

Yo, so from speed wise, and take off, how much different is the Maxima. I read that it gives an extra 10hp, but I want to know hands on

 

^^^^ There had been numerous threads about this, but the HP gain is nominal, if any at all. For a 5-10 hp gain, try the wsp y pipe, the filter is for sound only, no real HP gain.

 

Yeah, I didn't notice any real difference (other than sound), with the KN.
But that warpspeed y-pipe = a noticeable gain in HP and gas consumption.

 

Yeah shyt, this day in age Gas consumption is big!!

 

yeah i've noticed my gas mileage has dropped since i put my y-pipe on and i remember the wsp website claimed that mpg would improve with it as long as the car isn't driven more aggressively. i live in the city so i can't really push it much so i have serious doubts about their claim

 

maybe you did something wrong.. or your cat-converter is clogged up.....

 

There is an .org sponsor, Berk Technology, that sells that K&N filter at a very good price.

here is a link to his filter (scroll to bottom):

K&N Filter

My gas mileage improved with the mods I have. When I had just a y-pipe and a pop charger, I got about 28 mpg on the freeway. With the fidanza, full exhaust and AMSoil in the tranny I can get 30 mpg, but it is difficult for me, since I tend to drive a little fast or pass with authority, etc.

Last time I drove to Seattle and back, I got 28 mpg, which included cruising around with some local Max guys and some spirited driving.

 

not quite sure how you increase air flow and get bad gas mileage.....maybe you now have a lead foot.

 

The sound is truly amazing, it's an agressive growl from 3500-5000 RPM or so, and then from 5000-6500 RPM it sounds even more aggressive and changes tone a bit to sound even better. Also, any time you're WOT you hear the aggressive growl.

The hp gain, though, I can't really feel. I read that you can't really "feel" an hp gain, though, unless it's at least 15 hp, so there could be a hp gain of 5 or so, but I don't really feel it. If you want to feel it, get a y-pipe, like others have said, or even better, get a y-pipe and a CAI (or HAI).

 

I ment to say better gas consumption with the y-pipe, though when I replaced my y-pipe the flex section was nearly gone so I have no solid comparison. On a cross country drive shortly after install and a new cat, I averaged around 27 per - a bit less in nebraska where 75 is the limit (ie 80-83).

 

if i can't switch out a y-pipe correctly someone should take away my wrenches i did also have a fuel leak (one of the rails) at the time and i fixed it but the mpg didn't improve over what it had been before the y-pipe went on. maybe i have another fuel leak i haven't found yet? i replaced the cat too with the metallic substrate one wsp sells. it is supposed to be better that ceramic. any opinions on metalic vs. ceramic?

 

ahhh memories

 

im curious if this would be better then a CAI since it requires a little reworking of the fender. I wanted to get good k&n filter, would this be the best option for someone thats useless when under the hood =)(read myself).

 

Or you could do this....
http://forums.maxima.org/showthread....light=Cai+pics

 

CAIs are hard to do and hard to find, the one posted by mygreenmax94 is homeade, i believe. I considered trying to do something like that, but I don't think they're much more effective than an HAI setup (hot air intake=no hole in the wheel well wall, the filter stays INSIDE the engine bay). The reason is because of the extra length of tube the air has to travel through. With my setup, it's just a short length into the engine, not a foot and a half of tubing. Where my intake sits, too, is near the cool fender, so it's not right on top of the hot block or anything. See my newly posted write up on how to install a K&N filter such as mine.

http://forums.maxima.org/showthread.php?t=468682

The install is really quite simple, anybody could seriously do it.

 

Actually, if you look at the CAI set up shown in MyGreenMax's link, it just goes underneath the headlight and just requires a tiny bit of cutting. Jeff92SE and MrGone figured out the design. I have one, too, I am just too lazy to install it.

You can buy a kit on ebay to do a CAI where you enlarge (cut) the small hole in the bottom portion of the sheetmetal directly above the center of the wheel well.

I looked at your thread about putting in that pop charger and it took me longer to read that than it did to install my own pop charger.

 

First the CAI install isnt hard...yeah its harder than what you did but its not what I would call hard (then again not a lot is with all I have done to these cars). Secondly I dont know how hard they are to find now but they were pretty common not long ago. I got mine off ebay for 50 or 60 something shipped...they have crappy filters though so I would recommend K&N anyway.

I have had both and yes the CAI is better. I got worse performance with the HAI over stock after the car heated up in the middle of the summer. Yeah its away from the block but in the middle of summer the entire engine bay is pretty much the same temp.

Basically both of the setups (CAI and HAI) are just for sound anyway but I like the fact the CAI is not sucking in hot engine air that can hurt performance...jmo. Living in a southern state I will stick with the CAI or stock before I use a HAI again.

 

I've been looking on ebay and stuff and have only found 1, it was like $187
or something. They have ones for the VG, but not many for the VE.

 

To make a CAI and install it isn't easy for someone "useless under the hood," that's why I'd suggest an HAI.

About the "pop charger," isn't that only for VGs? I have a VE and my write up is about the VE K&N intake HAI install. Sorry if it didn't help you after you already installed yours. I'm new to all this and I'm sure a lot of other people are too....just tryin to help out all those who aren't wrench monkeys with some detailed explanation. If you don't like it, don't waste you time reading it.

 

.
Don't get all butthurt over it dude,he was just poking fun...

 

HAI = Pop charger VE or VG

A CAI is a better set up and isn't very hard to install. Yes, it costs more because it actually requires more tubing.

Don't get so upset, dude. You overcomplicated everything.

Pop charger (HAI) install:

1) buy K&N cone, MAF adapter, hose clamp
2) take out stock air box
3) bolt MAF adapter to MAF sensor
4) attach K&N cone with hose clamp
5) close hood and drive car

 

Cool, well I guess it's just my opinion then that the HAI is better for me, and I got my opinion from seeing others discuss it, and it seemed good. It's all good, I'm not "upset" or "butthurt" or anything, I just had someone PM me asking me for a more detailed explanation on how to do the the install and so I just took 10 minutes and busted the write up out. I do think it will be helpful for those who haven't done it and have little experience with this kind of stuff.

 

Yeah it will help some. There are people on this board that cant change their spark plugs without a write up lol. I just remind myself when I see the people that have to have a write up for every little thing that some arent as mechanically minded as I or others are.

People are just wired differently. My brother is one of the most intelligent people I know...he is a great musician, singer and artist (drawing etc.) but he cant do a thing mechanical. Heck I had to go change his tire one day because he had a flat. Now there is not a thing I cant do with my hands on a car or machine of any type but I dont have the patience or ability to play instruments and you should hear me sing...well actually you shouldnt lol.

Anyway my long pointless paragraph was to say that there are indeed people on here that are not very mechanically inclined and come on here for write ups etc so you will help some people out. Just dont take offense to those like Cliff or me that have done it and it seems super simple to us so we dont understand why anyone would need a write up...we dont mean to be offensive. Like I said there are those on here that write up will help.

BTW the intake I got way back said it was for a VG. I saw the pics and knew it wasnt for a VG but a VE instead. I bought it to take a chance and sure enough it was a VE molded after the PR one. I had them correct their listing though.