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LandieG

Member Since: 13 Mar 2013
Location: nr Caerphilly
Posts: 91

Butters wrote:
I would love to see dyno results of paper vs performance filter I recon you would struggle to see the difference

There are dyno tests on Evoque (don't shoot the messenger!!) forums which show that there is a 1-2% LOSS of power with a K&N, which puzzled me - especially after putting one in my wife's Evoque??!

Will see if I can find the link…

29th Mar 2015 6:33am

tazmarkuk

Member Since: 24 Jan 2012
Location: Birmingham
Posts: 134

The PCV (Positive Crankcase Ventilation) system is designed to regulate and remove fumes from the engine crankcase, and to alleviate crankcase pressure which could cause oil leaks or seal damage. It’s a way for gases to escape in a controlled manner from the crankcase of an internal combustion engine.
During normal operation of an internal combustion engine, there’s a compressed air and fuel mixture inside the combustion chamber that is ignited and as a result, forces the piston down. A small amount of that ignited mixture leaks past the piston rings and ends up in the crankcase. This leakage is often referred to as “blow-by” (leakage past the piston rings), as well as oil mist.
Some of the oil mist and other products settle along the engine intake and over time form a “gunk.” This potentially could be the main cause, all engines will have different amounts of oil in the intake, so some MAF will last longer than others.

29th Mar 2015 7:40am

K9F

Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

2008 Defender 90 Puma 2.4 XS CSW Stornoway Grey

Fitting a Provent 200 (or another form/brand of 'catch can') will alleviate the symptoms described above and some have a pressure release system built in too.

If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!

29th Mar 2015 9:57am

Cupboard

Member Since: 21 Mar 2014
Location: Suffolk
Posts: 2971

2011 Defender 110 Puma 2.4 HT Corris Grey

LandieG wrote:
Butters wrote:
I would love to see dyno results of paper vs performance filter I recon you would struggle to see the difference

There are dyno tests on Evoque (don't shoot the messenger!!) forums which show that there is a 1-2% LOSS of power with a K&N, which puzzled me - especially after putting one in my wife's Evoque??!

Will see if I can find the link…

There was a long post from one of the tuners (BAS I think) here which showed similar results. Performance air filters rarely gave any benefit and in some cases were worse than standard.

Edit: found it: http://www.defender2.net/forum/topic21125.html

"Filter tests, time to stop buying S**T me thinks."

bell-auto-services wrote:
The testing and results were on an Defender 2.2 TDCi independant car we had on the dyno today.

STD filter 121.3 Bhp & 325Nm
K&N filter 116.7 Bhp & 317Nm
Foam filter 120.8 Bhp & 320Nm
Green Cotton filter 120.4 Bhp & 323Nm

Click image to enlarge

Click image to enlarge

Click image to enlarge

Make your own choice but NONE make any more power than the standard filter does so a total waiste of time UNLESS you NEED a cleanable filter.

Pete

29th Mar 2015 10:44am

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