| Author | Message | ||
     joshua Frances (Joshua) Member Username: Joshua Post Number: 88 Registered: 10-2002 |
I was lookig for some info on aftermarket air filters, like the air force one, K&N style. I did infact see it in kyles window, but I remember a few years back, there was a write up on the thing, with graphs etc. I just cant find it. also, who is rnning different air boxes to increas HP or economy? what is out there? ( besides the tornado, lol) I recall this being discussed, but the search provided me with nothing I needed. Thanks, Josh | ||
| Keith Kreutzer (Revor) Member Username: Revor Post Number: 139 Registered: 11-2002 |
I run a K&N Cone style. Pretty simple install... I got the intake hose from a mid 90's 4.3 vortec engine.. It clamps on right over the mass airflow sensor, then it clamps on over a piece of 3" thin wall aluminum tube for a couple inches then clamps to the filter... A simple bracket holds it to the fender. And the GM tube has a spot to put the air intake temp sensor... Pretty much the same as a $200 air force system without the seperator for less than $60... Some don't like K&N's I do but i do maintain them... What do i get for all this... Maybe a bit more MPG (not measurable) but throttle response is noticably better at higher RPMs plus it seems to cruise at highway speeds with less resistance... Not a lot of improvment at this point but some... | ||
| Norm Orschnorschki (Norm) New Member Username: Norm Post Number: 10 Registered: 02-2003 |
I don't know about the K&N cone filter, but the box type filter for a D1 is bad news, especially off road in a dusty environment. Although K&N may flow air better than a stock filter, the downside is that it lets a lot of fine dust get through, which the stock filters keep out . I didn't notice any big improvement in performance with the K&N -- only rough running. I'm sticking with the stock filters and changing every 10 K miles or so. ---Norm | ||
| Matt (Doc175) Member Username: Doc175 Post Number: 100 Registered: 11-2002 |
Norm, that's interesting to hear. No one ever really says anything bad about K&N. Does anyone second that opinion? I may rethink going with K&N!!! | ||
| John Moore (Jmoore) Senior Member Username: Jmoore Post Number: 411 Registered: 10-2002 |
Search the archieves, I looked into it, and it seemed the consensus, was no or marginal gain in HP. To really keep out dust you have to really oil the filter which can cause problems with the MAF sensor. If you under-oil it to lessen damage to the MAF, you get more dust. Keep the paper. | ||
| Blake Luse (Muddyrover) Senior Member Username: Muddyrover Post Number: 672 Registered: 02-2002 |
give me two pers i need two pers , so i can stomp in my air force ones sorry i had too | ||
| Keith Kreutzer (Revor) Member Username: Revor Post Number: 141 Registered: 11-2002 |
I did an interesting experiment with the K&N several years ago... We use a very fine (25 micron) high flow filter material for our clean room applications at work it is very clingy to dirt for lack of a better term... I took a bit of this paper an simply clamped it in line with the airbox on my F350 Diesel using a K&N... After about 1000 miles i took a look and found no oil or excess dirt/dust to speak of on the filter material.... I'd like to use this CR filter material but it is very expensive $65 SF!!! But it proved well enough to me that the K&N was a decent filter... I trust it and run them on all my vehicles... | ||
| joshua Frances (Joshua) Member Username: Joshua Post Number: 89 Registered: 10-2002 |
Blake, if you just made sence, we might figure out what you were sayin man! | ||
| John Moore (Jmoore) Senior Member Username: Jmoore Post Number: 414 Registered: 10-2002 |
Blake, you must have really figured out the Black and Tan...  | ||
| RJ Clayton (Tozovr) Senior Member Username: Tozovr Post Number: 307 Registered: 09-2002 |
The conical stuff you see out there is bad for two reasons. 1. K&N's do not filter as well until they are dirty...and then they don't flow...so what's the point? 2. Drawing in hot engine bay air is a fools chore...it is less dense and you will lose 1% HP for every degree increase in intake temp (do the math on a 200hp motor with a 60 degree increase in underhood temp). They do flow more air though (please see #1 for caveat) but more hot air. If you were to run one with a cold air intake and a cold air canister, you'd see some gain...till your filter satrted filtering....heh heh I know Oil filters filter down to about 12 microns...I'd be surprised if an air filter were to let anything bigger in than the oil filter would (I may be VERY wrong on this though!!!)LOL! RJ | ||
| John Abrams (Jabra2) New Member Username: Jabra2 Post Number: 18 Registered: 02-2003 |
I agree with the K&N drawing in too much hot air from the engine bay. I put the K&N cone setup on and my engine started to ping. The computer pulled timing out so the power dropped like a rock. Swapped the original airbox back, and no problems whatsoever. I have K&N's on my muscle cars and wouldn't look at anything else for more power, but they pull cold air from out of the engine bay through either ram air, cowl induction, or just a divider separating the intake from the heat. I was going to try and fabricate a piece to separate the intake from the hot engine air, but I didn't see how I could do that without compromising water fordability. I just ordered a safari snorkel kit and plan on using a K&N with that, so we'll see how that goes. But definitely skip anything that pulls in hot air from the engine bay, regardless of whether or not it flows more! | ||
| Corey Shuman (One_bad_rover) Member Username: One_bad_rover Post Number: 81 Registered: 09-2002 |
K&N is bad for your motor, too much stuff sneaks by, I have heard this from BMW tuners too, they recommended paper filters behind a cold air intake with the heat shield, however the best bet is the snorkel, rams air in and you can use factory filter. Great HP and mileage gain too!!! | ||
| phil (Powerslide) Member Username: Powerslide Post Number: 41 Registered: 11-2002 |
Corey, Is there a dyno graph that shows the "great hp" gain? I am skeptical when it comes to claimed hp by these aftermarket people unless they prove it. | ||
| Larry Grubbs (Larryg) Member Username: Larryg Post Number: 154 Registered: 03-2002 |
I call BS on "Ram-Air" effect of forward facing snorkel. There are many bends in the tube before it makes it into the engine. There have been many discussions over the last few years about this one. K&N filters work fine as long as you don't overoil them. However I think LR has a service bulletin about the use of K&N or oiled filters due to oil getting on the "Hot Wire" of later model Disco's and causing problems. Larry | ||
| Paul T. Schram (Paulschram) Senior Member Username: Paulschram Post Number: 1047 Registered: 02-2002 |
I've been running a K&N oiled air filter for more than 60K miles and the PO ran the same filter for several thousand before I bought it. The truck burns no oil (and leaks very little!) and the interior surfaces of the cylinders showed no excessive wear from particulate contamination. As for supposed horsepower gains, unless it were going to increase the horsepower by 100%, I doubt I'd even notice it... Someday, I'll have a snorkel. Peace, Paul | ||
| Todd Juneau (Toddxd) Member Username: Toddxd Post Number: 56 Registered: 11-2002 |
I have also been running the K&N filter for the last 30K miles on my 97D1. I have taken it to baja 11 times with this filter in. Several of the roads consist of fine silty red dirt of which I have driven on for over an hour, sometimes following the dust cloud of another vehicle. I have never had a single problem. I hesitated to install the K&N after all the feedback on DWEB, therefore I must be either really lucky, or the K&N's are not really as bad as some say they are. I think I will try a regular paper filter the next time I head to Baja just to see if I notice any difference. | ||
| Corey Shuman (One_bad_rover) Member Username: One_bad_rover Post Number: 82 Registered: 09-2002 |
dont have any dynos on HP just going off of what I can feel, which may be all in my head:D, as for bends in the snorkel that doesnt really matter too much, maybe its not a true "ram-air" bad choice of words, more of a cowl iduction type. As for the filters Im going off of what I have heard from many a bimmer tuner, if its good enough for the bimmer its good enough for the rover;) | ||
| joshua Frances (Joshua) Member Username: Joshua Post Number: 96 Registered: 10-2002 |
Todd, are you rinning a cone style filter, or just a k&n in your stock airbox? | ||
| phil (Powerslide) Member Username: Powerslide Post Number: 42 Registered: 11-2002 |
I've had K&N's on my cars/trucks and yet to see performance / reliability issues attributed to the K&N drop filter. The main thing is to properly wash and oil the filters and also mounting in the stock airbox. Some over-oiled filters caused MAF sensors to go bad but that is user error. Now for cone filters, it is not advisable for the Disco since it will just suck hot air (as most noted) and water ingestion as well. | ||
| Todd Juneau (Toddxd) Member Username: Toddxd Post Number: 57 Registered: 11-2002 |
Josh - just a stock air box K&N...no problems so far and noticeably better performance. "Knock-on-wood" that I am not just lucky! | ||
| Christian Cartner (Cartner) New Member Username: Cartner Post Number: 34 Registered: 10-2002 |
I have a K&N square in the airbox, and a rolled piece of panythose plastic tied over the horn on the airbox to keep the bigger crap out even from the filter. Seems to work really well, especially in chaff or thicker dust conditions. you just tap the pantyhose portion, and lots of the big stuff drops off. Added another 1/3 to the interval I have to clean my K&N. I am considering putting the paper one back on soon however just to see. |
