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sharkey964

Member Since: 05 Oct 2014
Location: On a muddy track
Posts: 579

2007 Defender 90 Puma 2.4 XS CSW Santorini Black

More air.

Hi all.
I just thought I'd share this,as a way to get more air into the cylinders.
Rather than get a performance air filter.
A standard air filter is only perforated over about 50% of it's surface area,so.
I have found,by taking the outer metal sheath off a standard air filter,it gives better air flow.the engine pulls a bit better & is more free reving.The diference is'nt massive but definately a gain.
To take the outer perforated sheath off,I just pop a flat blade screwdriver under the edge of the join & pop the spot werlds,then with a pair of grips peel off the perforated sheath.
I already have a bigger intercooler,tweaked pump & upped the boost.This gives just a little bit more,& it costs nothing.
You can take the man out of Yorkshire,but can't take the Yorkshire out of the man.

Marc.

14th Mar 2015 10:07am

g-mack

Member Since: 07 Jan 2014
Location: northumberland
Posts: 1967

might try that!.
im thinking of a better hose from wing to filter too!original plastic one seems very restricted. drove mine briefly without filter to wing connected and low down felt more responsive!

My 109 thread

my youtube channel

14th Mar 2015 11:40am

Litch

Member Since: 10 Mar 2013
Location: Oxfordshire
Posts: 765

Going to play devils advocate here.

Without going and opening my airbox I am assuming that the blank section is in-line with the air inlet hole?
If the incoming air has a straight run then I am guessing that in future you will see a distinct dirty area in-line with this hole where the air is being drawn into the airbox and straight through the filter material meaning this section gets clogged quicker. By fitting a blank over the filter material in this area (as per OE) the air is forced to be drawn through a much larger area of the filter material thus spreading the dirt over a larger area.
Just a rambling thought???

Some standard spec aftermarket air-filters are perforated all over anyway, in fact I have just replaced mine and the one I took out was just like this and had steel mesh over the whole filter body however the BP one I replaced it with has the blank section as per OE. Can't recall the manufacturer of the previous one but I suspect it is going to be BM or BP as I tend to buy their service parts year in year out. Didn't look too hard at the filter, it wasn't dirty (I do quite a low mileage and don't drive across the Sahara much) but as it had been in 12-months I replaced it anyway.

For a while I ran an ITG performance air-filter on my 300TDi (along with larger intercooler, tweeks etc) but after cleaning it just once I decided that I just couldn't be bothered and have resorted to standard filters again. I am not saying that it didn't make a difference, just that I couldn't notice it.
In fact I listed the ITG filter only last week and it was snapped up quite quickly.

ONE LIFE, GET IT!

14th Mar 2015 1:25pm

sharkey964

Member Since: 05 Oct 2014
Location: On a muddy track
Posts: 579

Mmmmm.Thats food for thought Litch.I never thought of it like that.
I have been running mine like this for the last couple of years and the old filterts have never had a more clogged area where the inlet is.& its prety dusty here in summer.I do run through a snorkle though.
Marc.

14th Mar 2015 3:05pm

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