K&N air filters

[100%Bitch]

I've seen on here a few times about people wanting to improve their performance by fitting K&N air filters, and although some say they're pretty good, it's also said that they do tend to contaminate the MAF because of the oil coming through from the filter itself.

Now, I seem to recall seeing somewhere that my 55 doesn't have a MAF, so would it be practicle to use a K&N filter and not have any problems?

 

[wireman]

Big problem is increased noise.

 

[rf065]

Now, I seem to recall seeing somewhere that my 55 doesn't have a MAF

I recall a thread recently which said that, but didn't someone post later that it did have one after all?

Russ

 

[100%Bitch]

I recall a thread recently which said that, but didn't someone post later that it did have one after all?

Russ

I just looked through that thread and it was undecided.

 

[television]

Your call Helen, not for me

 

[rf065]

I just looked through that thread and it was undecided.

Have you looked through the US sites?

http://mbworld.org/forums/w211-amg/259144-2004-e55-mass-air-flow-sensor-maf.html#post3030782

Russ

 

[Uncle Benz]

You would be fine with a K&N on your fifty five if that is what you wanted to do...

There have been some reported issues with the foam rim of the filter being sucked into the airbox allowing unfiltered air to be drawn in to the engine. This is not a good thing!

Are you suggesting that you are looking for more power?? Or is it the outrageous price of Merc air filters that is upsetting you? I know, they are a bit dear!!

Rather than buy the K&N's, get some self adhesive heat reflective mat from Agriemach and apply it to the underside of the air box. This will reduce the intake air temperature significantly, and probably give a better performance boost than new filters.

Alternatively start saving for a 65. You've got it bad, I reckon...

 

[colechelle]

I've seen on here a few times about people wanting to improve their performance by fitting K&N air filters, and although some say they're pretty good, it's also said that they do tend to contaminate the MAF because of the oil coming through from the filter itself.

Now, I seem to recall seeing somewhere that my 55 doesn't have a MAF, so would it be practicle to use a K&N filter and not have any problems?

Havent you got enough power already!! can tell your a female, always want more!!!!

 

[jibcl500]

waste of money, probably get more BHP with the mercedes filter anyway.


Snake oil as some say!!


jib

 

[Dave's E55 AMG]

I've run mine on K&N's for 2 years know 50K miles they need cleaning and re-oiling now, cars run fine. It does sound a little more growly as the air gets through quicker.

 

[100%Bitch]

Rather than buy the K&N's, get some self adhesive heat reflective mat from Agriemach and apply it to the underside of the air box. This will reduce the intake air temperature significantly, and probably give a better performance boost than new filters.

Alternatively start saving for a 65. You've got it bad, I reckon...

Do you think that it would really work?

 

[jibcl500]

Nope..............

Water injection if you want a sizable performance increase. Or turbo, or supercharger or just buy a car with enough BHP to give the ard on you want.

jib

 

[100%Bitch]

Nope..............

Water injection if you want a sizable performance increase. Or turbo, or supercharger or just buy a car with enough BHP to give the ard on you want.

jib

But I have one of those.

 

[jibcl500]

But I have one of those.

What the ard on or the BHP?????

jib

 

[kth286]

I think you will find that AMG cars use high flow filters anyway, so there is unlikely to be much improvement in performance.

Of course that may not be your motivation.

 

[NewMB]

I've seen on here a few times about people wanting to improve their performance by fitting K&N air filters, and although some say they're pretty good, it's also said that they do tend to contaminate the MAF because of the oil coming through from the filter itself.

Now, I seem to recall seeing somewhere that my 55 doesn't have a MAF, so would it be practicle to use a K&N filter and not have any problems?

Well, according to my local dealer, the "55" engine does have a MAF sensor.

 

[wireman]

A "high flow" or less restrictive filter must have either more area, bigger holes in it or be made much more aerodynamicaly efficient and reducing energy loss by smoothing any curves and steps in the pipe work, so it will have take up more under bonnet space to be a better filter.

In a petrol engine the inlet air flow rate is directly proportional to the power output, and since flow rate through a pipe system is proportional to the square root of the pressure drop over that pipe system it becomes apparent that only towards the extreme maximum demand can a reduction of intake restriction make any difference to the power units efficiency. It can only make a "improvement" at near full throttle and as such I do not think that this sort of mod is worth the trouble, we pay enough for the cars and if it was in any way worth while the manufacturer would use them as original fit.

There may be a small increase in the maximum power available at full throttle and max RPM but when and for how long does your cars engine operate under these conditions is the 64 dollar question.

If you like more noises drive with the windows open or get Harley...

 

[Number_Cruncher]

I tend to agree with wireman's comments.

Anyone who thinks that MB / AMG would spend millions developing an engine, paying experts to optimise the air flow using advanced CFD tools, and then ruin the effect by fitting a poor air filter is kidding themselves.

Original air filters are virtually all well designed, giving low pressure drops, good filtration, and quiet operation. At best, an aftermarket filter might provide only one of those attributes.

K & N?, I wouldn't fit one to a lawn mower!

See here for more;

http://www.duramax-diesel.com/spicer/index.htm

 

[Andrew Rymer]

Thanks Number Cruncher.....that was a very informative link.......made me think about all the friends that fitted these so called high performance filters and how much money was wasted!!

Regards
Andrew

 

[stumo]

I use K&N because they are usually cheaper than 2 stock filters. In the case of my ML270 it is only 1.2 stock filters.

There is also a rebuttle to that ISO test they used (in Number Cruncher's link) on K&N's website. It has something to do with the particular size of dust particles that are used in that test, vs the particle sizes you get in real life and the particle sizes that actually cause engine wear. Apparantly that test is not designed for engine air filter testing.

Anyway, I had the K&N reccomended to me by someone I know and trust very well, who has worked in professional motorsport for 30+ years on everything fom GroupB rally and turbo F1 to present day LeMans prototypes and GTs. For what its worth he said Pipercross and K&N are the only 2 to go for. Obviously this advice asumes you are doing other proper things to up your engines performance to warrant needing increased air flow.

Having said all that, I can fully understand why people wouldn't want to go there, you know with all the hidden agendas and marketing mumbo-jumbo and hearsay and snake-oil calls. In fairness, I think the snake-oil call is warranted if soneone is simply dropping in a K&N and expecing 10% improvement in whatever.

So in summary I think if you have to ask, you shoud probably stay with the stock filter. Thanks for reading todays lecture.