BMC or K and N ?

[maxpaul]

Please can someone advise if the BMC filter has less oil applied to it than the K and N
Both look very well made I am just worried about the oil treatment and possibile damage to the MAF.

Thanks Paul

[Martian O]

I've had a BMC filter in my Turbo for three years with no problems whatsoever. I've also used K&N before in other cars with no issues.

[maxpaul]

Thanks Martin I have a K and N fitted at the moment and I am having problems with Maf fault codes so now going to try a BMC and new MAF

[mr pg]

You could also look at the Green Cotton filters.

[maxpaul]

BMC filter going in today. Still need an answer to, should i leave the plastic filter/mesh out as it keeps falling to the bottom of the filter box? or should I glue it in?

[Ian_UK1]

maxpaul said:

BMC filter going in today. Still need an answer to, should i leave the plastic filter/mesh out as it keeps falling to the bottom of the filter box? or should I glue it in?

The plastic 'filter' as you call it is in fact a flow straightener for the MAF. Under no circumstnaces should this item ever be removed from the intake. It doesn't restrict the air-flow in any way (it's been made sufficiently large to ensure this is the case) so there's nothing to be gained. What will happen, if you remove it, is the MAF will mis-read the amount of air going into the engine - you'll no doubt be aware of all the major issues this will cause.

[maxpaul]

Wow Ian thanks for that information.
Could it have been this that has been causung all my problems with ABS and PSM lights to come on when driving hard?
Hope so and may update other threads if it is the case

Paaul.

[nsa]

Try cleaning the MAF in Isopropyl Alcohol (IPA) before you replace it. You can buy it on ebay for about £5. Bathe the MAF wire in a pool of IPA. Don't touch the wire directly.

[Ian_UK1]

maxpaul said:

Wow Ian thanks for that information.
Could it have been this that has been causung all my problems with ABS and PSM lights to come on when driving hard?
Hope so and may update other threads if it is the case

Paaul.

It will be intriguing to see if this is the cause of any issues you've been having. As suggested above, it would defnitely be a good idea to clean the MAF sensor in isopropyl alcohol too. Any build-up of crap or contamination on the sensor will cause the engine to run lean.

Once you've repaired the flow straightener and cleaned the MAF, disconnect your battery negative terminal for a couple of hours too. This will reset all the adaptation parameters in the ECU to factory. The ECU will then re-learn and re-adapt quickly when you first use the car again.

I'd be interested to know how you get on.

Edited by Ian_UK1 on Thursday 20th September 11:25

[GT3-RS]

I've got a K&N an I don't have any Issues been on over a year

[maxpaul]

I have also had a K and N filter for over a year with no problems its only been after the remap that the problems have started I guess an increase in boost may effect the MAF and the performance of the filter we will see

[EvoSlayer]

I've had a BMC panel filter in the standard airbox for a few years now without any issues, before this I had a K&N cone filter in a twin box setup...this was crap and caused no end of issues so was quickly binned. Car is a tweaked 2004 996 turbo.