K&N filter results

[BuckHunt]

i put a k&n drop in (not conical) filter in my trooper... my gas mileage increased from consisten 15-15.25 to 17.25mpg. Checked it again recently (~5k miles or so after k&n installed) and got 16.75mpg.

Thats a decent 1.5-2mpg increase, actually quite good I say when the numbers of mileage i've been in during ownership have been low (from 10mpg up to 17+).

power increase? Nothing.
some say the conical gives a little more power.
The intake on ebay looks cheap. its got a bracket to attach the filter to the intake hose, nothing you couldn't come up with yourself. www.calmini.com makes an (expensive) filter for the 3.2l and 3.5 l's

[BigSwede]

That's interesting, I just put a K&N drop-in in my Trooper on Friday. I don't keep super close tabs on mileage though, just roughly to keep an eye on things.

[lee0726]

My 93 RS (3.2dohc) has been running a K&N for about 3 months now. I did notice about a 1mpg increase, but no gain in power. My milage actually went up again when I switched to Mobile 1 synthetic. Don't know if this was due to the oil change or what, but no complaints from me! ;D

[Zaphod]

I'm considering installing a K&N conical in my rig, not only for the power/milage increase, but also to open up some room under the hood for a second battery.

However, looking under the hood this weekend I noticed that the existing air filter seems to be fed from a scoop of some sort that disappears into the bodywork.

So, if the existing filter is fed by fresh air coming in through a scoop, is it wise to install the K&N under the hood, where it would be sucking down hot air without a scoop? All the photos I've seen show the filter out in the open (within the engine compartment) without any scoop or other intake.

[Eric]

That raises a good question. When I was part of the V8SHO.com list, a lot of guys were "Porterizing" their intakes, which was first done by guy named Ron Porter, hence the name. Basically, this process was simply adding a cone filter, but doing it inside the fender, where cool air would be more prevalent. You had to extend the plumbing into the fender, but it worked. They say 10-15hp gains with it done that way, but you had to check the filter more often, because it was in closer proximity to the stuff that the tire would sling off. Not necessarily a huge deal on a car, but when 'wheeling in the mud, it could become a problem in a hurry.

That, and I don't know that there's near enough space in the fender to fit a big fat cone.