K & N air fliters

[MattF]

I quite fancy doing it but are there problems with the car running hotter if it's sucking air from the engine bay?

Probably not hotter, as such, but performance may well suffer.

[JimSuperSix]

What? I thought the entire point was to allow more air in and get more power????

[Apache]

hotter air is less dense, so despite less restriction, you'll have less air mass due to it being hotter.

[MattF]

What? I thought the entire point was to allow more air in and get more power????

If you mean by disconnecting the elbow and rotating it, you'll get more air
but it will be hotter, meaning it's less dense than cold air. It may improve
it somewhat, but only marginally. A less restricted COLD air feed is what
will make the difference.

[JimSuperSix]

So there's no real point to just twisting the elbow around?

What it really needs is a large diameter pipe going to the outside somewhere, such as upwards through a hole in the bonnet (but it will suck in rain water) or sideways out of the wing.

[MattF]

Replace the existing ducting.

[The Lovely Boyo]

So there's no real point to just twisting the elbow around?

What it really needs is a large diameter pipe going to the outside somewhere, such as upwards through a hole in the bonnet (but it will suck in rain water) or sideways out of the wing.

So when you're blasting down the motorway in a downpour, do you think the water going into your engine is dry?

The air intake is just behind the headlight, where it gets pretty wet - in the wet.

Thats why peeps fit snorkles - high intake = safer wading and less dust if crossing deserts etc.

[JimSuperSix]

do you think the water going into your engine is dry?

Is water normally dry then?

Anyhow, I was thinking more of when the truck is parked up a vertical inlet on the bonnet will just fill up, whereas a horizontal pipe behind the headlight won't.

[BUSHWHACKER]

Is water normally dry then?

Anyhow, I was thinking more of when the truck is parked up a vertical inlet on the bonnet will just fill up, whereas a horizontal pipe behind the headlight won't.

There's a drain hole in the bottom of the filter housing, and clean air is sucked out the top of the housing through the centre of the filter, which is seal in the housing anyway.

[JimSuperSix]

Hmm, perhaps a nice mesh duct in the top of the bonnet then.... should be easy enough, but how much more power will it make with an unrestricted cold air feed over the normal behind-the-headlight inlet?

I noticed when towing that it wouldn't do above 50 on a slight incline, foot to the floor (although it feels lively enough without the trailer) so it could probably do with a bit more oomph.

[nero279]

Do you happen to have a photo of that mod you would be able to post please?

I quite fancy doing it but are there problems with the car running hotter if it's sucking air from the engine bay?

I turned mine round for my last offroading session, (woodlands 3rd dec), as i knew it was gonna be wet. I turned it round so as to make the intake higher and safer whilst wading. It gives a slightly better intake sound, but nothing like what a k&n should, haven't noticed it running hotter at all other than on the way home down the motorway, when the rad was well clogged with mud anyway. It was fine up to about 65-70mph when i started creeping to 75/80 the temperature guage started to creep up, so i backed off again and it came down to normal, no harm done. Haven't noticed any difference in performance either.

[JimSuperSix]

LOL, those have to be lowest res and blurriest photos I've ever seen! But thanks for posting them anyway

I don't do any off-roading (just out and about in the snow) so no real need for the inlet to be higher up.

ta
James

[plumb bob]

So, the question remains, how much extra power can be got from alterations to the air intake, maybe fitting an intercooler? is this possible on a 2nd gen 2.4td, and is it worth it??




.

[nero279]

LOL, those have to be lowest res and blurriest photos I've ever seen! But thanks for posting them anyway

Yeah i took them on an old 2mp camera then compressed them using jasc psp's batch processor as they were about 20kb too big for the forum, 75% compression may have been too much.

Plumb Bob
I'm sure you could fit an intercooler to a 2.4 and i'm sure results would be good, there's been a few threads about this fairly recently, but i think they may well have been for 3.0l.

[MattF]

The 'Whoops I fitted an intercooler' thread.