Thread: Air filter cleaning

If you hold a K&N filter up to the light/sun and you can see clearly the thousands of holes, why would anyone think that it could filter particulate matter out of the incoming airstream, you won't find holes in an OEM paper filter, unless it's stuffed, Regards Frank.

Originally Posted by isuzurover

.........
However - wrt to the start of your post - in the 1940s, they really had very little idea about dust, and what it did to an engine. The first serious works on aerosol particle mechanics did not appear until the mid 1960s.

Despite this, largely on an empirical basis, air cleaners were extending the life of tractor engines right from the beginning of the century, and by the 1930s had become common in cars and trucks, although as I commented earlier, mostly for noise reduction, at least in the UK.

And despite the lack of empirical research, Rover clearly knew what they were doing when they fitted a large, effective aircleaner with a cyclonic precleaner in 1947, right from the start.

John

There are two ways of looking at how efficient an aircleaner is

1. How much does it restrict airflow

2. How much dust does it let through.

If you are after peak performance, 1 might be of interest, although the actual power loss of typical aircleaners is pretty small - most of the improvement from the oiled cloth type ones is the psychological effect of the added engine intake noise.

If you want your engine to last, 2 is the factor you will be interested in, and there is no doubt that modern paper element filters (with, as suggested, a cyclonic precleaner, and preferably a guard element) are far more effective and have added greatly to engine life of vehicles.

John

Originally Posted by spudboy

Try a quick search on eBay. You can get filter kits for your particular vehicle with proper quality components (like Coopers filters). Stay away from the no-name really cheap offers.

This one for a TD5 is going for around $85 for air/fuel/oil filters including the copper sump plug washer!

Discovery-S2-TD5-Filter-Set

You'll just have to search for the appropriate one for your model.

HTH
David

Thanks David,
Now THIS is more like it!! Discovery-S2-V8-Filter-Set.
Oil and air filters for a mere $60 inc postage.

Cheers for the initial link, bud!

..:: KIEREN ::..
2000 Disco II Auto V8
Object Of Mass Consumption
AussieAubs Disco Page

Originally Posted by AussieAub

I was quoted $85 from one local place.....(hence my OP)!
Does that sound right? Coz it sure doesn't to me!!

Way too expensive!!

D2 V8 Coopers filter is $15 from British Parts!

Originally Posted by JDNSW

There are two ways of looking at how efficient an aircleaner is

1. How much does it restrict airflow

2. How much dust does it let through.

If you are after peak performance, 1 might be of interest, although the actual power loss of typical aircleaners is pretty small - most of the improvement from the oiled cloth type ones is the psychological effect of the added engine intake noise.

If you want your engine to last, 2 is the factor you will be interested in, and there is no doubt that modern paper element filters (with, as suggested, a cyclonic precleaner, and preferably a guard element) are far more effective and have added greatly to engine life of vehicles.

John

In the filter world, FILTER EFFICIENCY purely means the proportion of particles which will be collected by a filter (either on a mass basis or a number basis). Penetration is also used which is 1-efficiency.

Pressure drop / Restriction (i.e. how easily air flows through the filter) is accounted for by using a metric called filter "Quality factor" - the ratio between pressure drop and efficiency.

In reality thouugh, for modern filters, the vehicle manufacturer specifies the efficiency, and the the "package" size (space available), and the filter manufacturer designs something which will fit with the lowest pressure drop possible for the given efficiency.

just picked up a k and n airfilter form auto barn and worked out a 16% power increse from my old filter (ryco) i used the dynolicus off my ipod. it seems to be repeatibul they were good quality and have a 1 milion mile warenty, 130 for the filter, comes pre oiled and the recharge oil kit is 27 bucks, . good value i reccon.

Originally Posted by discoveryseries1

just picked up a k and n airfilter form auto barn and worked out a 16% power increse from my old filter (ryco) i used the dynolicus off my ipod. it seems to be repeatibul they were good quality and have a 1 milion mile warenty, 130 for the filter, comes pre oiled and the recharge oil kit is 27 bucks, . good value i reccon.

They have a 1 million mile warranty on the filter. All that says is that the filter will last 1 million miles when cleaned in the proper way at the specified interval.

If you look up their warranty conditions, you will note:

Therir warranty is for vehicles...
when used primarily on paved roads

WHAT IS NOT COVERED BY OUR WARRANTY
Any K&N product used for ... 2: any off-road use...

I won't bother to comment on the accuracy of a $13 dyno and a sample size of 1 with no test conditions listed.

As the end of the day, it is your engine and your money... But the cost of an engine rebuild will buy a lot of beer and hookers.