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#1
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K&N filter
Since diesels suck so much air would a K&N filter be a good idea? I question whether they filter good enough. Thanks
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1983 300 SD. 157K. 1964 Studebaker GT Hawk 1972 Corvette, Bought new 2007 Toyota Tundra 2007 Toyota 4 Runner 1993 Toyota Sequoia Press 1 to continue in English, Press 2 to disconnect and call back when you learn to speak English. |
#2
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I believe the general consensus of the fellows on here is that K&N+diesel=bad.
I believe the K&N's dont filter well enough. Stick with the OEM filters.
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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#3
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K&N filters don't filter very well. There is also little benefit in trying to reduce the intake restriction by messing with air filters. I remember a test done by one of the hot rod/muscle car mags in which they tried to flow test air filters. They had to cut them in half to even get a restriction reading on the flowbench. As long as it isn't clogged, the stock filter has basically no restriction.
Short version: Avoid K&N.
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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar. 83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles 08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles 88 Jaguar XJS V12 94,xxx miles. Work in progress. |
#4
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A clean paper filter works better than a clean K&N, but a dirty paper filters works worse than a dirty K&N. Buy paper, change before it gets too dirty.
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- Brian 1989 500SEL Euro 1966 250SE Cabriolet 1958 BMW Isetta 600 |
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Uh oh, another K&N thread. Do a search on this topic, you'll be sure to find TONS of info/opinions.
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TC Current stable: - 2004 Mazda RALLYWANKEL - 2007 Saturn sky redline - 2004 Explorer...under surgery. Past: 135i, GTI, 300E, 300SD, 300SD, Stealth |
#6
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I like my K+N,however I made a foam prefilter (oiled) to catch most of the dust.
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1999 w140, quit voting to old, and to old to fight, a god damned veteran |
#7
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Completely pointless. Why not just use a normal filter that actually keeps the air going into the motor clean?
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-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#8
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One thing that is NOT an opinion is that the stock setup flows more air than a stock engine will need.
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http://superturbodiesel.com/images/sig.04.10.jpg 1995 E420 Schwarz 1995 E300 Weiss #1987 300D Sturmmachine #1991 300D Nearly Perfect #1994 E320 Cabriolet #1995 E320 Touring #1985 300D Sedan OBK #42 |
#9
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you dont get the turbo whistle with the stock setup
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1981 300 SD 213k miles "Stock for now" 1999 Super Duty 7.3L 113k miles 1981 300 SD 180k miles "Heavily modified" SOLD |
#10
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You can try one of these http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220410664705&rvr_id=&crlp=1_263602_263622&UA=L*F%3F&GUID=f54a6b521210a0b58f752aa5ffa6d12e&itemid=220410664705&ff4=263602_263622
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http://superturbodiesel.com/images/sig.04.10.jpg 1995 E420 Schwarz 1995 E300 Weiss #1987 300D Sturmmachine #1991 300D Nearly Perfect #1994 E320 Cabriolet #1995 E320 Touring #1985 300D Sedan OBK #42 |
#11
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The Engineers
in Stuttgart look upon "Pfeifen" or "Furzen" Turbochargers as poor examples
of the Automotive Art.
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'84 300SD sold 124.128 |
#12
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I have a Federal 84 300D and have a K&N Air Filter that fits the Stock Filter Housing; not the Cone shaped K&N with the so called Performance Intake.
At the bottom is a thread that I started for a different reason but started a lively decussion on the K&N Air Filters. I bought the K&N due to the fact that the Stock Air Filter was getting partly contaminated with the Oil From the Blow By and to save money. In 2 years I have cleaned the K&N 2 times. Both times I felt the area behind the Filter before it goes into the intake. Both times I have felt nothing gritty that would indicate that anything is getting past the Air Filter. Since the inside of the Air Filter Housing has a film of Oil on it I believe that if any dust was getting past the filter in a years time some of that dust ought to stick to the Oil; but I have found none. I also have read some of the articles on the internet concerning the K&N Filters and it appears that some of them do not seal well in the stock Air Filter Housings of some Vehicles (some Ford Pickups in the article I read); so if they do not seal well they do not filter well. When I got my K&N Air Filter I noted that the Rubber sealing area on the filter was stiff compared to the Fram Filter it came with. Before, I installed the filter I put a bead of Silicone Sealant on the sealing edge of the filter. So on mine all the Air goes though the Filter Element. Also in Long Beach CA it is dusty; partly due to the Heavy Truck traffic on the Freeway not ever 1/4 of a mile from me where the Trucks are headed for the Port of Long Beach. The thing is that no one has actually tested the actual K&N Air Filter/s that are made for Mercedes. The other issue is that it is claimed the K&N Air Filters ruin the MAP sensors on Gas Cars. http://www.peachparts.com/shopforum/showthread.php?t=212563
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84 300D, 82 Volvo 244Gl Diesel Last edited by Diesel911; 02-18-2010 at 10:14 PM. |
#13
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Quote:
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-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#14
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I've got a K&N cone filter sitting in my carport. I installed it on my 300sdl and the sound that it produced would certainly please a teenager. I noticed no difference in mileage or performance. I went back to the stock air filter. The K&N filters allowed a lot of sound to eminate from the intake. I'm running a straight exhaust pipe to a turbo muffler, a bit louder than stock, but the sound of the K&N filter was too much.
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#15
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Hold a K&N up to the light. You'll notice lots of little pinholes. Now do the same thing with an OE quality paper filter
Because of its larger surface area an OE quality paper filter flows more air then a K&N. -J
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. |
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