Keeping Bugs out of Safari Snorkel?

[RoverLander]

I have a D4 TDV6 3.0 with a safari snorkel. After a recent country trip I cleaned out the air filter and noticed lots of bugs that had made their way down the snorkel. I figure that the front facing snorkel intake may take in more bugs than the standard sideways facing air intake.

I'm thinking of putting some sort of mesh over the snorkel intake or facing it sideways. However I dont want to effect the air intake for the engine.

Any suggestions to reduce my car eating too many bugs?

[~Rich~]

Just purchase on of these Uni Filter precleaners when you need the added protection.
4x4 Pre-Cleaners (http://www.uniflow.com.au/contents/en-us/d2.html)
Rich

[RoverLander]

Just purchase on of these Uni Filter precleaners when you need the added protection.
4x4 Pre-Cleaners (http://www.uniflow.com.au/contents/en-us/d2.html)
Rich

Thanks Rich for the suggestion...but I just rang a Sydney Unifilter stockist who asked if the car was a turbo. When I said yes he said you can't fit them. It effects the intake air pressure sensing.

He did suggest that you can turn the snorkel head backwards so the bugs don't enter the intake. Now I'm more confused :confused:.

[NavyDiver]

Thanks Rich for the suggestion...but I just rang a Sydney Unifilter stockist who asked if the car was a turbo. When I said yes he said you can't fit them. It effects the intake air pressure sensing.

He did suggest that you can turn the snorkel head backwards so the bugs don't enter the intake. Now I'm more confused :confused:.

Turning the snorkle head backwards to the rear of the car is the go if there is locust or similar major bug issues. If you cannot see through the mess on your windscreen it is definatley time to turn it!:D

[discowhite]

Thanks Rich for the suggestion...but I just rang a Sydney Unifilter stockist who asked if the car was a turbo. When I said yes he said you can't fit them. It effects the intake air pressure sensing.

He did suggest that you can turn the snorkel head backwards so the bugs don't enter the intake. Now I'm more confused :confused:.

BULLspit!!!!
ive run them on my td590 for 2+ years and also on my D2a for at least 15months...no problems at all..except you have to turn the buggers inside out to get the bug's out!
they are made of a rather open filter foam they will stop large dust particules and deffinatly leaves and bugs, and will have 3 tenths of no effect on the turbo...

cheers phil

[Peter]

Guys,
With the risk of taking the conversation off the track... Is the snorkel working as designed? The bugs in the filter (depending on qty and size) are perhaps less an issue than moisture and dust getting into the precious bits.

I mention this for the reasons that I am interested in putting a snore on my D3 before a cape trip, have dusted a die$el and I would have preferred bugs over dust bits, and wonder if the additional pressure of a forward facing snorkel is a good thing?

Over to you to comment up to me to be advised.

Cheers PK

[Blknight.aus]

pool filter socks or your wifes old stockings (or yours if thats your thing)

[nice1guv]

Different Landy, but my Safari snorkel has a piece of flyscreen mesh cut to fit behind the plastic grill piece.

It stops all bugs from going down the snorkel.

I've removed it from time to time and not noticed any difference in the engine (but it is a 300Tdi not TDV6).

You could easily cut a piece of screen to try and see if there is any engine difference.

[connock]

You could try a Donaldson Donaldson Filtration Solutions (http://www.donaldsonfilters.com.au/engine-exhaust/air-filtration/sub16cat16)
Like Peter I would be more worried about fine dust, large bugs stop at the filter.

connock

[shining]

pool filter socks or your wifes old stockings (or yours if thats your thing)

We use black stocking socks to filter the lint out of the laundry water for our greywater system. Yeah they would be great over the snorkel and hardly noticeable. Great idea Mr Knight.

[Disco4SE]

Just be careful who you tell that you put your wifes black stockings over your snorkel :D

[connock]

We use black stocking socks to filter the lint out of the laundry water for our greywater system. Yeah they would be great over the snorkel and hardly noticeable. Great idea Mr Knight.

You could start a theme here, I used one of my wifes red bra,s on my sand flag accros the simpson once:eek:

connock

[shining]

I'm not going to post photos....not on this site anyway :-P

[clubagreenie]

Intake air pressure sensing can but not always occurs both pre and post turbo so you get a comparative measurement of the actual boost pressure (ambient vs pressurised air). So it will make no difference at all.

[~Rich~]

Intake air pressure sensing can but not always occurs both pre and post turbo so you get a comparative measurement of the actual boost pressure (ambient vs pressurised air). So it will make no difference at all.

I agree, I can't see a relatively clean forward facing snorkel head with either panty hose or a Uni Filter type sock having any less air pressure than the standard guard entry because it is not facing the airflow.
I can see how a rear facing snorkel head should not be used at highway speeds because of the negative suction that is created.

Yes it is important to keep it clean but none less than the standard air filter.

[oldsalt]

I can see how a rear facing snorkel head should not be used at highway speeds because of the negative suction that is created.



I was driving a D3 with OEM Raised Air Intake (rear facing head) recently in Germany at 105 MPH for over an hour on an autobahn ... no problems at all with "negative suction".
cheers

[clubagreenie]

You don't, well actually you do, create an area of suction but it's not suction back up the snorkel. The best analogy is the slipstream created by a car, probably best described by NASCARs simplicity. Their only goal is to make as clean as possibly hole in the air. You need to move the air smoothly as any turbulence is drag but you need some turbulence across the surface to prevent excess laminar flow and friction of the air on the surface slowing the car down.

But it's what happens behind the car that's important in relation to the snorkel. A lot of race cars will have a diffuser which creates too much turbulence to aid any but those cars following extremely closely and a wing to create physical downforce. The NASCAR only has a spoiler (vs a wing). The rear window of the cars is quite steep so as air passes over the trailing edge of the roof and this creates a separation of the airflow over the roof. Some will continue straight back possibly falling slightly while the rest will tumble down and create great turbulence and so form a lower pressure area in the depression at the bottom of the window/forward edge of the boot lid.

The spoiler at the rear edge of the boot lid lifts the airflow over the rear edge so the flow off the roof sees a gentler slope on the window and delays separation and reduces drag.

Whats important to note is at no point is air "vacuumed" or put into a point of negative pressure (there is the low pressure point but this is a reference pressure, it's simply lower than the air under/around the car). What does occur is that the air behind the rear facing head is it slows down and drops in effective pressure (this has just given me a thought that the air slows down and anything in the air will start to fall out of suspension). So what there will be behind the head is a low pressure.low flow area of air that is simply waiting to be sucked into the head just as it would be with the head in any position with the vehicle stationary at idle.

[RoverLander]

So some say sock (or possibly bra, undies or stockings:twisted:) would be ok... Others not. I think i will go with the guy that i tried to buy a sock one and told me not to due to the turbo. On digging a little further into the unifilter support information on the internet it also states to only use the sock off road and at low speeds... So that sort of rules it out for road use.

I cant work out the effect of a rear facing snorkel on the air pressure into the engine.. So i probably wont risk that either.

I think the safest solution is to point the intake sideways. That is most similar to the original guard intake. Hopefully most of the heavier bugs will then simply fly past the intake. It will look a little odd facing that way though..

Any thoughts on that conclusion?

[clubagreenie]

Ahhh...

Sideways WILL have an effect on flow into the snorkel, a detrimental one at that. It will create a venturi effect at the inlet of the snorkel and reduce (or at worst stop) flow.

Rear facing at highway speeds with or without a cover of some sort will have no change in the flow of air into the engine apart from the (minimal) positive pressure that having it forwards at high speeds will achieve.

[RoverLander]

Ahhh...

Sideways WILL have an effect on flow into the snorkel, a detrimental one at that. It will create a venturi effect at the inlet of the snorkel and reduce (or at worst stop) flow.

Rear facing at highway speeds with or without a cover of some sort will have no change in the flow of air into the engine apart from the (minimal) positive pressure that having it forwards at high speeds will achieve.

I agree clubgreeni, it will have a venturi effect. However the original guard intake would have the same effect woudn't it?

Rather than risk any change I may just leave it pointing forward and just buy a spare air filter....

[bigmac]

Iwould leave it facing forwards and put some mesh over it.
Last xmas when we were coming back from Vic. I turned the head around on the
D3 and forgot about it when we got back to Qld and all the rain it cost me a new
air flow metre and could have been worse, as it sucked water into the filter and lots
of it.

Bigmac

[connock]

I agree with bigmac in fact I think you are worrying to much, LR know people are going to fit RAI and will catch bugs and thats why ( one resson ) they have such a big air box befor the filter. Just clean it out when you replace your filter or after driving through a plague.

connock

[jonesfam]

I tried my wife's stockings for this & it didn't work at all.:mad:
Those fishnets sure look good on her though.:p
Jonesfam

[clubagreenie]

You'll only get the venturi effect when sideways and even then it's not shaped in any way close to optimal for the effect to be even 50% of what it could be.

Stop worrying, start driving.

[Tombie]

You'll only get the venturi effect when sideways and even then it's not shaped in any way close to optimal for the effect to be even 50% of what it could be.

Stop worrying, start driving.

Exactly... And the FILTER in the airbox is just that :D

Take it out every so often and bang the bugs out of it...

Problem solved and doesnt cost more money...

[Redback]

Exactly... And the FILTER in the airbox is just that :D

Take it out every so often and bang the bugs out of it...

Problem solved and doesnt cost more money...

X3:)

[Blknight.aus]

On digging a little further into the unifilter support information on the internet it also states to only use the sock off road and at low speeds... So that sort of rules it out for road use.

I cant work out the effect of a rear facing snorkel on the air pressure into the engine.. So i probably wont risk that either.




FAFF..

point it where you like and put a stocking on it.

I like to point them backwards for one reason, with a stocking on it it becomes self cleaning if you leave it (the stocking) a little "loose"

ask yourself this question.

when I have the boot into it in low range and the engine is working hard at 2200 RPM on full boost trying to claw me up a dune is it drawing more or less air than when Im coasting along on a highway at 110 KPH at 2200 Rpm with only half noise applied?


you have an ELECTRONICALLY managed engine, it knows the difference between the pressures in the intake and the manifold and will adjust the fueling to suit.

the air filter box has a water drain in it, so long as you dont seal it up, let it get damaged it will get rid of normal quantities of water from rain ingestion.

My real advice on this one...

put the snorkle head one way and rotate it around abit listening to it as you drive, in some positions you may get induction noise in others you wont.

Put it on in the direction that has the least or no induction noise (unless you like induction noise) and put a stocking on it to help keep the birds and the boulders out (it also stops wasps from building nests in there if you leave it for a few weeks)