K&N or BMC air filter? which one has better effect on POLO GTI?

[GTI POLO]

I agree with it seems a little smoother... Dont know about throttle response??? arguable..

Induction noise doesnt necessarily mean more power..

[Grant]

I agree with it seems a little smoother... Dont know about throttle response??? arguable..

Induction noise doesnt necessarily mean more power..

i said it wasn't about power

most people see louder induction noise as desirable in itself.

[DiZzY]

Anyone interested, the BMC part number for POLO Gti's is 311/01

[Petrina Polo]

Hi,

You will not notice any difference between the two.. I would prefer the BMC as they are not as heavily oiled up as the K&N... maybe ruin your MAF..

As for performance, your dreaming if you think they make a difference..

I tested a XR6T on the dyno... Before with stock paper air filter made 276kw at wheels.. Then changed to K&N panel type and made 277kw at wheels... 1rwkw on 276rwkw...

What benefit will you make on a 120fwkw car??? Nothing!!!

[DeanB]

There are no issues with the MAF and the filter.

[Dub_Star_V6]

Honestly, can I request Mods consider banning all further filter threads, only because these discussions are almost always about someone's opinion, while those presenting empirical evidence showing time and again that these filters are bunkum are flamed.

Once and for all, most restrictions in intake systems occur either before or after the filter. Therefore the idea of the filter itself providing a restriction and better filtration for the rest of the system is simply nonsense.

Intake systems are restrictive to flow, not filters, and anyone trying to flog you a $120 filter claiming negative pressure as a result of a poorly flowing filter just wants your money.

Get a better intake, not a 'better' filter.

FFS...

/ end rant.

[Buller_Scott]

im thinking about one for my TDI and would be interested in the results

dont do it man- even though there is higher air flow across the board, and better induction noise (perhaps?), you and i have pd cam lobe wear to look forward to at around the 200-250,000 km mark

[Blitzen]

dont do it man- even though there is higher air flow across the board, and better induction noise (perhaps?), you and i have pd cam lobe wear to look forward to at around the 200-250,000 km mark

How is the type of air filter going to effect your cam lobes?

[Buller_Scott]

How is the type of air filter going to effect your cam lobes?

hey blitzen, how's it goin?

apparently, the pumpe duse engine was really just developed in order to test common rail engine/ injection pressures (if i recall correctly).

as such, its been rumored that there are a few components on the cars that werent designed with ultimate longevity as a priority. in the pumpe duse diesels, the exhaust gas recirculation motor/flap and intake manifold clogging seem to be issues when on the other side of 100,000kms. when north of 200,000km's, early cam lobe wear (documented abit with north american 1.9 tdi pd cars) seems to be an issue also.

with the air filter, many tdi'ers will argue that k&n or bmc will have less filter element when laid out on the floor, than a stock paper filter will, and they'd attest that filters with less filter element than stock, will not be able to filter as well as stock paper, and in turn will contribute to this lobe degradation.

lucky bastards over there have group buys/ makes for lumpier, sturdier cams though.

[p.s. once again im just regurgitating diesel-specific stuff i've read over the last couple years]

[Blitzen]

hey blitzen, how's it goin?

apparently, the pumpe duse engine was really just developed in order to test common rail engine/ injection pressures (if i recall correctly).

as such, its been rumored that there are a few components on the cars that werent designed with ultimate longevity as a priority. in the pumpe duse diesels, the exhaust gas recirculation motor/flap and intake manifold clogging seem to be issues when on the other side of 100,000kms. when north of 200,000km's, early cam lobe wear (documented abit with north american 1.9 tdi pd cars) seems to be an issue also.

with the air filter, many tdi'ers will argue that k&n or bmc will have less filter element when laid out on the floor, than a stock paper filter will, and they'd attest that filters with less filter element than stock, will not be able to filter as well as stock paper, and in turn will contribute to this lobe degradation.

lucky bastards over there have group buys/ makes for lumpier, sturdier cams though.

[p.s. once again im just regurgitating diesel-specific stuff i've read over the last couple years]

I'm going well...Still overseas fixing other peopls screw ups!!

In regards to the engine, I just don't see how what air filter you use will impact on cam lobe wear, considering that the 2 area(air intake and cam shafts) are completly separate and sealed from one another.
I thing the issue that these engines are having above 200k km is that the Case Hardening is wearing off the lobes of the cam, contributing to higher cam wear. Any engine will do this over time, but there are so many factors that would contribute to this, and I think what air filter you use has little or no bearing on it.
The filter that would have a massive bearing on cam load wear is the oil filter, not the air filter.

[Blitzen]

hey blitzen, how's it goin?

apparently, the pumpe duse engine was really just developed in order to test common rail engine/ injection pressures (if i recall correctly).

as such, its been rumored that there are a few components on the cars that werent designed with ultimate longevity as a priority. in the pumpe duse diesels, the exhaust gas recirculation motor/flap and intake manifold clogging seem to be issues when on the other side of 100,000kms. when north of 200,000km's, early cam lobe wear (documented abit with north american 1.9 tdi pd cars) seems to be an issue also.

with the air filter, many tdi'ers will argue that k&n or bmc will have less filter element when laid out on the floor, than a stock paper filter will, and they'd attest that filters with less filter element than stock, will not be able to filter as well as stock paper, and in turn will contribute to this lobe degradation.

lucky bastards over there have group buys/ makes for lumpier, sturdier cams though.

[p.s. once again im just regurgitating diesel-specific stuff i've read over the last couple years]

I'm going well...Still overseas fixing other peoples screw ups!!

In regards to the engine, I just don't see how what air filter you use will impact on cam lobe wear, considering that the 2 areas (air intake and cam shafts) are completly separate and sealed from one another.
I think the issue that these engines are having above 200k km is that the Case Hardening is wearing off the lobes of the cam, contributing to higher cam wear. Any engine will do this over time, but there are so many factors that would contribute to this, and I think what air filter you use has little or no bearing on it.
The filter that would have a massive bearing on cam lobe wear is the oil filter, not the air filter.

[Buller_Scott]

its a very interesting thing to read/ be involved in. i too think there would be many factors, but i've read enough to keep the stock paper filter in place, personally.

either way, and despite not be too good with between-service self-done oil changes, imma keep my little oiler for a good few years yet (regardless of cost, and because apparently vw/audi is going to phase out good ole manual in favor of dsg, apparently? plus, my car doesnt have a diesel particulate filter, which hampers mods).

i'd love to give a higher-flow kn or bmc filter a go- i reckon it'd be sweet. hell, the difference just the seat intake made was worth it. but im sticking to my guns on two things over time (in this forum): oem paper filter, and upgraded smic as opposed to fmic.

i just enjoy the idea of being able to present a different angle with what little i have. and no, cogdoc, im not referring to my fruit.

[Dub_Star_V6]

As if any further evidence was required...

[woosh73]

bmc filter

I did upgrade to the bmc filter from OEM . Just a personal choice as i can clean my bmc more times so the car runs better.
I paid $110 from autobarn , i don't think there's a huge difference between K &n and bmc as i used the k&n on the rexy.

$90 is pretty cheap , you should ask the guy who owns the franchise to set up a mail order system.

[DeanB]

The K&N or BMC may not make an ounce of difference wrt performance, but the slightly louder induction noise is a bonus without having to go to a pod filter (illegal) or taking a hacksaw and drill to the intake box (looks messy) to make it louder.

Horses for courses the filter debate, for $100 you aren't going to get some amazing performance enhancement !