Thread: Foam unifilter

I have used Unifilters on carby cars with good results, but the problem with injected cars with a MAF is that it is very possible to have some of the oil from `the filter to coat the MAF wire.
Some MAFS have a burn off function on shut down but AFAIK LR ones do not.
The solution I use in very dusty conditions is a Unifilter filter sock which goes into the top of the snorkel ie it has a rubber rim which fits into the top of the pipe and the head is then put on. They used to come in packs of 3 so you could change them every few days. That way you avoid the MAF problem as any oil is caught in the paper filter.
It's a dirty job to clean them though and the car tells you when they get clogged.
My main air filter was still clean after a WA trip in my RRC where I followed cattle trucks on dirt roads a lot .
Regards PhilipA

1 X UNIFILTER TJM Snorkel (OD 88mm ID 76mm) Droopie Pre Cleaner Filter | eBay

I had one on my D2a when I first bought it 10 years ago. Ran it for a while then changed over to a K&N. About seven years ago I changed over to OEM filters (Mann Hummel, Mahle, etc.). I've not found any noticeable performance difference with any of them (that's on my Td5 running 25psi of boost pressure on a TurboTechnics VNT, larger intercooler, remap to suit, high flow exhaust system, etc.). Given that all independent tests have consistently found that the paper filters do the filtering job better and they have no risk of oiling up the MAF sensor down the line from them, I can't see a reason to waste time and money with the reusable air filters. Washing them is a pain and in a colder climate like Tasmania takes time to wait for them to dry before oiling and refitting.

If your finding that the paper filters are not achieving sufficient filtration then you won't get better with the reusables - their 'high flow' nature means allowing more through...

As for the snorkel head slip over filters. Probably great for dirt road driving. But I've found they just get ripped up when 4WDing from the overhanging branches.

Try changing your snorkel head to face rearwards perhaps?

X2 re the Mann Filter. Many other brand filters are a loose fit in the airbox whereas the Mann is a pushin fit - you need to work around each of the sides to squish it in. I don’t see dust in the airbox lid or intake pipe.

Thanks I will stay with my Mahle filter might put a small amount of grease on the seal are the snorkel socks any good as I have found all black socks as I said earlier the dust from unsealed roads into work are really bad.

I have found all black socks as I said earlier the dust from unsealed roads into work are really bad

Maybe you were using NZ socks.LOL

I found the inlet socks good on my RRC 3.9.

After about 3days I noticed a drop off in performance and then changed them. the outside/really inside was always filthy but the outside was as clean as , so my conclusion is that they really work.
Regards PhilipA