Air Intake Upgrade

[Fausto79]

in people's opinion, what is the better air filter. the cylindrical type like you get on deefers or 200tdi or the rectangle one you get on later discos.

reason i ask is that i'm designing a more straight through intake and was thinking i could fit a cylindrical type where my square one, getting air directly from snorkel and then through aluminium pipe/silicone hose combo to the turbo. rather than the rabbit maze of different size and shape plastic i have now.

if i'm going to eventually upgrade turbo etc. i want to make sure nice clean cool air can come in with as little resistance and pressure change as possible. I have seen a few systems like i mentioned on this forum (possibly username Tank had one?) and others. i believe the consensus was that the cylinder type filter is better?

the other things would be to upgrade IC as well and ceramic coat intake and exhaust manifolds.

[discomatt69]

Air intakes make a big difference when your engine is sucking in heaps of air, something a low revving 4wd does not do, cold air is enough...
Ceramic coating, I did my extractors when I did the 4.6 conversion to keep some heat out of the engine bay. Did it make much difference? Stuffed if I know but probably not worth the extra $$

[Pedro_The_Swift]

Are they the same cylinder types as in the V8 D1's?

[Fausto79]

Are they the same cylinder types as in the V8 D1's?

Doesn’t look like it. The one I’m thinking of is in a metal type container with a hole and seal at one end and some cheese grater type grill on the outside.

From looking at net the v8 is just some type of paper accordion type thing that wraps around the housing?

[Fausto79]

Air intakes make a big difference when your engine is sucking in heaps of air, something a low revving 4wd does not do, cold air is enough...
Ceramic coating, I did my extractors when I did the 4.6 conversion to keep some heat out of the engine bay. Did it make much difference? Stuffed if I know but probably not worth the extra $$

I thought diesels sucked more air in. As it’s a constant suck with no throttle body to limit it. Also longer stroke and higher compression. If you put your hand in front of a petrol intake you stall the engine. If you do it to a diesel you get sucked in never to be seen again.

I might wrong on the more air but I always thought diesel uses more.

If it didn’t make such a big difference then why do I notice huge difference when putting a k&n filter as opposed to paper one. I had spare k&n one i used until my paper one got delivered and difference was noticeable. Wasn’t in there long though as from tests done by a member here the k&n ones are next to useless.

[Fausto79]

Found it

Air Filter Tests (Finally) (https://www.aulro.com/afvb/technical-chatter/50650-air-filter-tests-finally.html)

Those cheese grater style filter is the one I mean

[discomatt69]

Not sore about the petrol v diesel and air consumed, we need a mechanic to answer that one but I would assume ( probably wrongly ) that a 4.6 at 3000 rpm would suck more than a 3l at 3000 rpm and fuel type would be irrelevant

[bee utey]

Not sore about the petrol v diesel and air consumed, we need a mechanic to answer that one but I would assume ( probably wrongly ) that a 4.6 at 3000 rpm would suck more than a 3l at 3000 rpm and fuel type would be irrelevant

Of course It All Depends. Is the 4.6 at full throttle? (Most traditional diesels don't even have a throttle plate.) Then it would draw more air than a 3.0 naturally aspirated diesel. Most of the time though a 4.6 runs at way less than full power, using less throttle. Then there's that thing called a Turbo Charger. Many diesels run quite a bit of boost, so the air flow of a typical turbo diesel could be 2 or 3 times that of a naturally aspirated engine. Even a 50% load on a turbo diesel will cause a fair bit of boost and increased air flow compared to a 4.6 petrol engine at 50% load.

[rick130]

Found it

Air Filter Tests (Finally) (https://www.aulro.com/afvb/technical-chatter/50650-air-filter-tests-finally.html)

Those cheese grater style filter is the one I meanThe Donaldson or Fleetguard pleated filter in that test goes straight in the 300Tdi housing.
It's less restrictive than the genuine filter.

[Fausto79]

The Donaldson or Fleetguard pleated filter in that test goes straight in the 300Tdi housing.
It's less restrictive than the genuine filter.

Any ideas what the part numbers on those would be? Cummings/fleetguard catalogue is 985 pages of confusion.

[Fausto79]

Put a new air filter in because old one was quite disgusting. Man what a difference. Purrs like a kitten. Improving other aspects of intake system surely would have a beneficial effect. Especially of turbo lifetime and on combustion.

Can somebody with one of those cylindrical air filter boxes do me a favour? Not sure if the defender and 200tdi D1 are the same box. But basically could someone give me dinensions of the housing. As is total length, diameter, intake outtake stub diameters and location (distance) of the outtake stub along the cylinder.

That would be a great help.

[Rick1970]

200tdi disco, out is in the end of the cylinder, intake in about halfway on the side. Can get some measurements later

[Fausto79]

200tdi disco, out is in the end of the cylinder, intake in about halfway on the side. Can get some measurements later

Thanks

[Rick1970]

https://www.aulro.com/mobile-gallery/17af405403d89d82240fd044fd49e918.jpg
Approx 12” long 7” dia 3” in and out

[Fausto79]

i contacted donaldson as they have some housings too and enquired about some of them and they replied with this. not sure about the numbers they quoted as i haven't done any calculations but their customer service seems exceptional.

"Hi,
FYI, a 2.5L engine at 3,000rpm will have an air flow requirement of around 210cfm.
With that said the smallest XRB housing we do is the 08 model which is capable of flowing 265cfm at 6 inches.

XRB housing
P/N B080080 list $185.89+Gst 2 in stock

I have attached a print for your reference.

As for alternative housing options, you could look at using one of our PCD PowerCore housings.

I hope this helps!"

they also had this attachment:

145403

[Fausto79]

More from Donaldson:

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"Hi Michael,

Thank you so much for this information. That is what i call exceptional customer service.

I hate to be a bother, but do you also have specification drawings for the PCD powercore housing you mentioned? What sort of airflow do these get and also what are the filtration numbers like? As in the particle sizes that the filters take out and %.

It mentions it as being light duty, is this what a normal 4wd air filtration system would be? Would it be suitable for off-road applications?

Thank you again,"

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"Hi,
The attached is our powercore brochure with air ratings, the ones that would work well for your vehicle, is the PCD’S which as near the back of the brochure. There are two that would work for your vehicle D090114 and D090115. 4WD drive is considered light duty just take a look at to filtration system that comes fitted. Powercore is designed to hold more dirt that standard air system"

See pdf attachment. if it doesn't work, i can send to whoever is interested.