K&N big difference?

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john snoo

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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?
 
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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!
 
john snoo said:
A friend just popped in with his friend's D2 TD5 manual. He told me to jump in and whizzed up the road, went 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!).
I also saw under bonnet 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?
Click to expand...
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!;)
 
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
 
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!
 
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
 
Nodge68 said:
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.
Click to expand...

"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.
 
Stanleysteamer said:
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!
Click to expand...

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

Stanleysteamer said:
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!;)
Click to expand...

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. :)
 
JUKE179r said:
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.
View attachment 230196
Click to expand...

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!
 
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
 
john snoo said:
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
Click to expand...


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.
 
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
john snoo said:
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. :)
Click to expand...
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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