Thread: Air Intake Upgrade

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 $$

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

Originally Posted by Pedro_The_Swift

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?

Originally Posted by 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 $$

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.

Found it

Air Filter Tests (Finally)

Those cheese grater style filter is the one I mean

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

Originally Posted by 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

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.

Originally Posted by Fausto79

Found it

Air Filter Tests (Finally)

Those cheese grater style filter is the one I mean

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