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K&N big difference?

Discussion in 'Land Rover Discovery' started by john snoo, Feb 5, 2021.

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  1. john snoo

    john snoo Active Member

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    My friend's D2 TD5 manual goes like absolute stink compared to mine! I asked what has been done but he wasn't sure although he said it's definitely been remapped (not sure who by), mayge EGR blank, and looks like exhaust mod or backbox removed (growls loud, too loud!).
    He has a gert big K&N air filter with original air box cut out. He reckoned that is a big part of the performance. I have had mine remapped (Dynachip which i am not too happy with to be honest) but will be getting it done again i think when I can. Just considering the K&N, but do people think it makes much difference?
     
    Last edited: Feb 5, 2021
  2. Stanleysteamer

    Stanleysteamer Well-Known Member Full Member

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    Good tuning is usually a combination of stuff.
    but a decent airflow on the intake is a good step usually.
    He'll need to keep it clean though.
    A proper free flow exhaust makes a big difference as does a decent remap. The hardware needs to be put on before the remap and it must be done on the car. IMHO.
    But if yours is an auto, then the improvement may be more obvious cos you ain't driving a slush box.
    I have balnked off the EGR on both my 300tdi and my TD5 to bo honest I don't reckon it makes a blind bit of difference, but then they were neither of them too dirty. A clean EGR is prolly OK, but a dirty one can really help block up the inlet manifold's flow.
    A LR mechaic i know once told me took one off to see a gap no wider than a pencil leading from it into the manifold, so keeping the muck out of the intake manifold has got to help, and blanking the EGR will help that. So to sum up, I don't think it is a performance enhancing device, it is a performance worsening prevention device!
     
  3. kermit_rr

    kermit_rr Green Member Full Member

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    interesting video
     
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  4. Stanleysteamer

    Stanleysteamer Well-Known Member Full Member

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    Just struck me, you might want to keep quiet about this, lockdown and all, though I appreciate he could have stood 2 meters plus away from you, chucked you the keys for you to disinfect then stepped back while you drove it off, with gloves on. But the insurance to drive the friend of a friend's car sounds quite interesting!;)
    Just saying!;)
     
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  5. kermit_rr

    kermit_rr Green Member Full Member

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    i've been sticking to the lockdown, but apparently I'm in the minority and the roads are jampacked :(
     
  6. triggersbroom

    triggersbroom Active Member

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    Be careful with any oil impregnated air filters you may go through Mafs at an increased rate
    Any excess oil mist can get onto the wires inside and burn them out
    I ran a k&n panel filter for a few years after my first tune and bit a maf about 14 mths
    Had a remap done by je engineering and it was the first thing he said I've an itg in now and the maf hasn't been changed in about 4 yrs
    Could have been me over oiling the filter
    But the itg just gets a blow out service time
     
  7. Colthebrummie

    Colthebrummie Well-Known Member

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    K&N are masters of marketing, unfortunately, they ain't masters of filtration.

    Col
     
  8. lynall

    lynall Well-Known Member Full Member

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    Try a search for k+n white rag test, or words along them lines.
    Basically a guy runs k+n for x period of time, removes inlet trunking then runs a white rag around the inside ,and when removed its filthy!
     
  9. Nodge68

    Nodge68 Well-Known Member

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    Absolutely. Not only do they let dirty air though, the oil from them trashes the MAF.

    A quality paper filler changed annually is the way to go.
     
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  10. Henry_b

    Henry_b ̿̿ ̿ ̿'̿'\̵͇̿̿\з= ( ▀ ͜͞ʖ▀) =ε/̵͇̿̿/’̿’̿ ̿ ̿̿

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    They're rock catchers not very good for particle filtration :rolleyes: marketing hype is top notch though o_O
     
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  11. JUKE179r

    JUKE179r Well-Known Member Full Member

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    As an alternate air filter, take a look at the Britpart air filter for our D2s part number DA4260. I’ve got one for my D2 V8 and it filters very well without oiling like the K&N.
    413F86B0-C920-4BD7-8AF0-A002056A3FA4.jpeg
     
  12. ifloochies

    ifloochies Well-Known Member

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    "A quality paper filter changed every 3 to 4 months is the way to go"......in my corner of the planet.

    There's something oddly satisfying about pulling the paper filter out of a pickup truck after 250 xtreme runnings hours in daily mining and dirt road use to see the startling contrast between the clean and dirty sides of the filter box.
    The bog-standard paper filters really work, and I wouldn't touch anything else with a 10-foot pole.

    You need to understand that "performance air filters" on a turbocharged diesel engine are a myth. You can pull out your air filter, go for a foot-to-the floor run, repeat that run with the filter installed and the only noticeable difference would be the more pronounced whistle of the turbocharger with the filter removed, certainly no performance gain.
     
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  13. john snoo

    john snoo Active Member

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    Excellent thanks Stan. What's a free flow exhaust, does it make a racket like my friend's?! Mine is a manual so I am definitely used to stirring the Quaker oats :D

    Ha ha, I appreciate your thought there thanks. I am well prepared for any fascist lurking, and many lurk sadly. Give a small man power, he will show you how small he is. But let's not get into that bull 5hit here. :)
     
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  14. john snoo

    john snoo Active Member

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    Thanks, I will go for that. Some really great posts here, glad I asked! I must admit I did wonder if it was a case of marketing over functionality, so many of these well-known things are 90% hype, sometimes 100!
     
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  15. john snoo

    john snoo Active Member

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    CHRIST!! So yes it appears the K&N is just a very expensive hole :D
     
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  16. john snoo

    john snoo Active Member

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    I am getting no email alerts whatsoever when threads get posts. Do other people get email alerts ok? All settings checked and I should be receiving em
     
  17. kermit_rr

    kermit_rr Green Member Full Member

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    Can't say I have email alerts turned on! I have on this thread, just for you
     
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  18. john snoo

    john snoo Active Member

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    Ha, I got an alert for that! I am blaming it all on you Kermit :D
     
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  19. lynall

    lynall Well-Known Member Full Member

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    Yes I get them, you have to click the email bit at the top after you click watch this thread.
    Currently following the forum news one.
     
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  20. Stanleysteamer

    Stanleysteamer Well-Known Member Full Member

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    We're shielding so go out very rarely, but during my recent trips to hospital, testing centre, and the doctor's i have to s
    A freeflow exhaust is what it says on the box, the air doesn't have to pass through numerous baffles and round lots of bends before escaping.
    To my mind the best are the absorption type which basically take a piec of straight exhaust pipe, put a load of holes in it, then surround it with a metallic case containing glass-fibre. But even if you just go with the standard widebore, single box sports exhaust from LR normal suppliers, you'll feel the difference without hearing it too much.
    Loads available. you might want to pay a bit more to get a stainless one.
    https://www.google.com/search?q=Spo...i22i29i30.10654j0j15&sourceid=chrome&ie=UTF-8
    By the way, just replacing the first box with a straight box is a complete waste of time, I did it with mine. Glad it cost very little as it gave no difference at all.
    Peco and Jetex used to be, and still are the peeps for absorption systems. Used them back in the days when I used to make up systems for kit cars as there was no such thing as a standard one then!
    Google them specifically, Peco is a name that makes other sh!t so you'll need to Google "Peco exhausts"
     
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