N/A Air Filter Tweak

Hello,

With my 2.5 N/A, is it possible for me to get rid of the large air filter housing and the two air hoses in order to fit a "performance" air filter straight to the air intake manifold, or can this not be done? My only concern is that an immitation K&N style filter will soon clog up with ****e and get drenched in oil from my heavy breathing engine (although current filter is clean). Would a better "performance" air filter even be of advantage to my engine, or is the land rover standard setup as optimised as it needs to be?

Thanks in advance!
-Pos

Look out! He's got a K & N!!!

In any N/A diesel engine you want AIR. You want as much of it as you can get, and you want it as COLD as you can get it.

After that, simple logic will show you the way.

It isn't by accident that LandRover arranged the air filter so that only fresh cold air from outside the engine compartment enters the filter housing.

This means the air should be as cold as it can be, and hopefully not loaded with oily mist from sucking in air from the engine bay.

If a paper element even gets wet with water (never mind oil) it more or less blocks air from passing through.

Of course, you could add a little turbo ....

CharlesY

When I needed to change my filter last year I noticed that the performance was lacking a bit and getting a bit of black smoke. Took the filter out completly and went for a quick drive, miles of difference, put the new filter in and it was the same as without, so if there was a difference it was very slight, so much so it was unnoticable. If you need a new filter get one, wouldn't waste your time with K&N and modding things.

K&N are crap 4 any offroad. only time i would change a standard air filter would be ta fit a Donaldson....best filter in the world.

Thanks! Well, I unhooked the filter and took her for a blast up a back road near me and I can't believe what a difference it made. I managed to get to 60 and it sounded superb! The only thing that I did notice was that it'd blasted some oil out of the top, still, I think I'll get an induction kit from halfords or motor world or something!

pos said:

Thanks! Well, I unhooked the filter and took her for a blast up a back road near me and I can't believe what a difference it made. I managed to get to 60 and it sounded superb! The only thing that I did notice was that it'd blasted some oil out of the top, still, I think I'll get an induction kit from halfords or motor world or something!

Click to expand...

As I said .... it's a N/A diesel, and it needs AIR .... just as much as you can get in there, and as cold as possible.

NO air filter is best.
But that means anything up to gravel sized chunks could enter the inlet ports and cylinders. An occasional bumble bee is one thing, but a handful of gravel is quite another.
A wire mesh stops rocks, and does not impede air flow much. So a few stainless steel pot scourers might be a way ahead.
Oil Bath with mesh is good but if it tips over the engine blows up.
Paper element is OK, and stops quite small particles - but it chokes up in dusty conditions.

You pays your money ....

Turbo stuffs in lots of air!

CharlesY

so Charlesy - yu sayin that if yu gorra snorkel, yu want to increase the air opening at the top and to have it facing forward, to get as much ram effect as possible?

how about two snorkels, both feeding the input plenum?

The Mad Hat Man said:

so Charlesy - yu sayin that if yu gorra snorkel, yu want to increase the air opening at the top and to have it facing forward, to get as much ram effect as possible?

how about two snorkels, both feeding the input plenum?

Click to expand...

Aye and a ramair scoop the size of a dustbin lid before it makes any noticable difference. Just fit a supercharger and have done with it.

The Mad Hat Man said:

so Charlesy - yu sayin that if yu gorra snorkel, yu want to increase the air opening at the top and to have it facing forward, to get as much ram effect as possible?

how about two snorkels, both feeding the input plenum?

Click to expand...

Aye and a ramair scoop the size of a dustbin lid before it makes any noticable difference. Just fit a supercharger and have done with it.

wouldn't two alternators have the same effect?

Went and bought myself a universal air induction kit from motor world earlier. It only cost £20 and has all of the necessary parts to get it to fit. It basically looks exactly like a K&N but at a fraction of the cost. Here's a link - http://www.streetwizeaccessories.co...ome-Open-Top-(Chrome~Red-Mesh-Funnel-Filter)/ - do you recon I've wasted my money?

Now I need to think how to fit the thing. Should I use the small air intake pipe that goes from the air filter box to the space under the wing, or should I use my existing filter box to manifold pipe?

The extra air effect is WHY they invented superchargers, of which the turbo-supercharger is but one example.

The ultimate limit to the power obtainable from any internal combustion engine is how much AIR can be induced into the cylinders in a given length of time.

So, you could make a big increase in the power of a 2.25 diesel if you raised the rev limit to 8,000 rpm instead of 4,000 rpm simply because it would breathe twice as much air per minute.

It would also blow up, but you get the idea.

But is we run the engine at 4,000 rpm and ram in twice as much air, we might get away with it.

CharlesY

I would add a turbo if I could get one cheap enough with the manifold to go with it. How do you get oil to the turbo charger though?

yer not quit eright there rupp. its the amount of oxygen yer can stuff in not the amount of air.

so if yer ran a closed induction system that was supplied with pure oxygen yer get stacks more power.

of course thats not practical nor safe. so use something with a higher oxygen content than air say fer instance N²O. then you could pump in more fuel and get more power

Cheers Slob! That filter should work fine though shouldn't it? (ie. not cause me any problems) I'll look into getting a turbo charger. Are old chargers on ebay likely to be fecked or do they not really tire out?

the bearings and stuff wear out but you can have then rebuilt at a turbo rebuilders or yer can chance yer luck on ebay

Got me new filter / induction kit put on earlier. I had to cut down the air intake pipe and snip the spring and bugger me what a bloody noise! Sounds like I'm driving a tank without tracks or a speedboat with wheels Quite like it, but I have another question for ye. If (for some reason) my new filter gets splashed with water whilst my engine is running, I should have time to turn my engine off before the water soaks through into the internals of the filter shouldn't I?

Depends, I know a guy who drove his diesel PUG through a big puddle and wrecked the engine. Water don't compress! In a big enough quantity BOOM!

Ever stuck your hand over the intake, its like a 10Kw vaccum, it would VERY quickly suck water through the filter and if there was enough cause damage.

Your air intake is quite high, and the intake should be facing backwards so you should be ok...

Post a pic of what you have done...

alright 2 mins