Foam filters

**D110V8D** · 21st October 2006, 10:41 AM

Hey guys,

I'm after some input into an idea I have to improve the airflow in the motor on the Pig.

It's a standard 3.5 V8 carby engine, with the oval airbox sitting on top of the engine.

My idea is to remove the airbox assembly and attach foam/pod type filters to the ends of the carbies.

I have a left hand (passenger side) fiberglass snorkel fitted and I also have a matching right hand side one (from 6.5 Rangie. Thanks again) which I intend to fit very soon.

So I will then have the pipes from the snorkels running straight onto the carbies, one each. I was thinking I could just slide the pipe over the top of a foam/pod type filter and hose clamp it to the neck of the carby, or perhaps the base of the filter pod.

Obviously some of the surface area of the foam filter will be covered by the pipe from the snorkel so only the end of the filter will be doing any filtering. Although I did see some tapered style filters made by K&N which may be better option.

Anyway I guess I'm just looking for some advice or ideas or some brainstorming. I want to get rid of the old airbox (it's not really water tight and defeats the purpose of having a snorkel in the first place). I realise it's overkill for a little 3.5 but I like the look of twin snorkels and any improvement to airflow has to be good, doesn't it?

**Blknight.aus** · 21st October 2006, 11:10 AM

you can do it but the filters will want more regular servicing.
as only a portion of them will be working...

why not try adapting a filter box from something else that takes the square foam filters? of course Im assuming that you have enough room under the bonnet to do this

**ladas** · 21st October 2006, 11:39 AM

I may be totally off track here, and I am sure somebody will correct me if that is the case, but if I am correct, you will by what you are planning end up with a reduced air flow not a greater one.

As you say the filter will only be effective at the end - and thet may clog quite quickly.

Plus I have never been a fan of foam filters - the ones I have had - ended up breaking up, with me having to strip down carbs to dig out lumps of air filter.

**BigJon** · 21st October 2006, 11:42 AM

Later model 3.5 Carby Rangies had twin square air filter boxes. I have seen one of those with twin snorkels, maybe that would be a better way to go.

**rangieman** · 21st October 2006, 12:18 PM

Why not encase the pods in a old milo tin or there abouts or get a sheetmetal place to make something to fit over the pods

and have one end with a flange to fit the flex pipe from your snorkle

easy peasy

**D110V8D** · 21st October 2006, 12:32 PM

After a quick look around on google I think I may have found something that will work. Of course if the price is right!

http://www.greencottonfilters.com.au/

Their canister filters look pretty good and should do the job. We shall see.

Otherwise I'm off to the wreckers to find some twin air cleaner boxes off a late carby model. I had no idea they came out with twin airboxes. Thanks for the tip Big John.

**loanrangie** · 21st October 2006, 04:06 PM

Bigjon is correct, early rangies ( around 80/81) use 2 rectangular filter housings that mount directly to each carby and have a 1" inlet. With some downpipe bits from bunnings you could modify them to take 2.5- 3" hose to the snorkle's.

**Bigbjorn** · 21st October 2006, 05:12 PM

Search the thread K&N Air Filters for an in depth discussion on this subject.

**Vern** · 21st October 2006, 06:49 PM

This is what i had done (its changed a lot now, but the filters are still the same), mind you its on a chev diesel.
Can get updated pics tomorrow.

**D110V8D** · 21st October 2006, 09:13 PM

Damien what are the drums/cylinders out of?

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