REaston21

Has anyone actually tried this air filter kit
http://www.knfilters.com/search/prod...x?Prod=57-1518 for better MPG. I am debating whether to just get the air filter, or the whole kit. Would love some feedback.

warpig602

If you're going to do the open air element, its best to get the whole kit or fab up your own isolator plate. Theres no point in doing a "cold air" intake, only suck in the hot air from the engine compartment.

BillyBoy

If you're looking for more power and MPG, and if you are going to have the JEEP for a while, it's worth it to go with any type of KnN.
It takes about 50 tanks of gas to get the money back though.
Still worth it for the extra HP though, and perhaps engine life.
Pkus, if you are hooked on the Cherokees, like most here, you can take off the setup and transfer it to most models, if you get another in the future.
Good-luck.

REaston21

so if i got the kit would i have to find a way to get cold air from outside the engine compartment? or would the heat shield equipt with the kit which is supposed to cut down on the heat suffice?

REaston21

do u have this on kit on your XJ?

XJ Stryker

Don't believe anything anyone says about the K&N set up. I used to have it on my Commander. On it there was an initial increase of about .4 MPG then after a few months it was gone. Cleaning them every year really sucks and you will spend just as much cleaning them every year as you would a new throw away filter.

There is no real HP increase maybe on a Dyno but you won't be able to fill the extra 5HP you get when you stomp on the gas.

Then on our older engine you don't want to open it up allowing more air into it due to the fact that the K&N will also allow more dirt.

Nice concept but execution is still lacking.

I used to be one of those guys that back up my 50 dollar purchase and wanted to justify it well that was 2 years ago and now I just don't think it was worth it.

warpig602

Thats the idea behind the plastic plate supplied, not sure how well it would work, probasbly better to have than to not, but its a lot of money for some plastic. The ricers mount their CIT's as close to the front of the vehicle as possible, i've seen some come in that had them running to the airdam on their car.......they came in with hydrolocked engines from sucking water through them! The whole idea is take allow cold air into the intake, secondary function is to allow more air in as well.

I dont have pics of mine installed, ended up putting a snorkel on after 6 mos. Not sure if there was much of a difference as I had done headers and gears all within the same week. To each his own.

djb383

7.9 hp at 4500 rpm......wonder what the increase is at <3000 rpm, where 99.999% of every day driving is done? 1, maybe 2? Hold one of those cotton gauze filters up to a light and behold all those little pin holes that the factory type paper element doesn't have. What passes thru those pin holes, besides air? Unless the inlet to the intake is outside the engine compartment, it's sucking in the same air the factory system sucks in.

CAEMI

I'm with Stryker: K&N is B&S.

CAEMI

Amen.

lurk520

So what are you guys saying? Don't even bother wasting money on a CAI? Just keep it stock? How about a throttle body spacer?

1991Jeep_Man

Or you can just build your own cold air intake for like $50 using parts from A/Z. Thats what I did.. heat shield, cone, actualy cold air, all for like 50 bucks.

XJ Stryker

My post was referring to just a drop in K & N air filter. I have no knowledge of the cold air intakes but on my old 87 I am not gonna get brazy with the intake either the moment I start supplying it good clean cold air is the moment it will decide to take a dump.

nielsenml

Funny, I'm reading your feedback regarding the K&N Air Intakes. Notice even the company doesn't seem to call them filters. And at the bottom of the page is their ad. LOL. Yeah my Cherokee came with the K&N mounted from the PO. I'm thinking of going to the JY and scrounging up an old box so that I can go back to a stock setup. Unless someone knows a link to a build page where I can see how to make something better.

lurk520

would that be a to z fabrication?? any special tools required??

The K&N set up is $293!!! Sounds like highway robbery!!!