↓ Advertise on Defender2 ↓

Home > Maintenance & Modifications > air intake
Post Reply  Down to end
Page 2 of 3 <123>
Print this entire topic · 
Glynparry25



Member Since: 16 Feb 2009
Location: Miserable Midlands
Posts: 3015

Wales 2009 Defender 110 Puma 2.4 XS DCPU Tonga Green
ZeDefender wrote:
I always assumed the Mantec is more for avoiding dust and spray and the Safari is more for scooping air and wading.
Isn't the Safari system more waterproof too, connecting directly to the air duct?


Safari are made for the inlet to be pointing backwards.

I can't remember where I read it but basically to get the 'Ram-air' affect from a Safari you would have to be travelling at something like 120-150mph. Plus ram-air doesn't work with turbos so pointless anyway.

If you seal a Mantec properly (Land Rover don't) it will be as waterproof as a safari.

Air filtration........ a snorkel helps but doesn't do a whole lot unless it has a pre-filter (safari) or have a centrifugal filter at the top. I decided to get one for mine and over the past year have emptied about 2 pints worth of dust/ sand out of it- but I am in a hot and dusty climate.

Either work as good as the other. Main things to do are

1. Pick the one you like the look of.
2. Fit and seal it properly..... your engine could depend on it one day!!!..... Plus it will just be a pointless piece of plastic if not sealed Rolling Eyes

Glyn Dog Sheep
Post #160361 6th Aug 2012 7:07pm
View user's profile Send private message View poster's gallery Reply with quote
ZeDefender



Member Since: 15 Sep 2011
Location: Munich
Posts: 4731

Germany 2011 Defender 110 Puma 2.4 SW Baltic Blue
Glynparry25 wrote:
Safari are made for the inlet to be pointing backwards.

Shhhh - do you think the others know?
Laughing

Incidentally, driving around the dust holes Italy, I noticed a lot of dust piling up at wheel arch height but hardly any on the roof - I would like to believe the RAI did something Wink Tell someone you love them today because life is short.
But shout it at them in German because life is also terrifying and confusing...
Post #160363 6th Aug 2012 7:10pm
View user's profile Send private message View poster's gallery Reply with quote
Glynparry25



Member Since: 16 Feb 2009
Location: Miserable Midlands
Posts: 3015

Wales 2009 Defender 110 Puma 2.4 XS DCPU Tonga Green
ZeDefender wrote:
Incidentally, driving around the dust holes Italy, I noticed a lot of dust piling up at wheel arch height but hardly any on the roof - I would like to believe the RAI did something Wink


I am sure it does help loads but if you are going to somewhere dusty I would defiantly recommend some form of pre-filter..... can cost as little as £30.

Glyn Dog Sheep
Post #160367 6th Aug 2012 7:16pm
View user's profile Send private message View poster's gallery Reply with quote
leeds



Member Since: 28 Dec 2009
Location: West Yorkshire
Posts: 8580

United Kingdom 
Glynparry25 wrote:



....... can cost as little as £30.

Glyn Dog Sheep


Pre filters can cost very little. Raid the wife's/girl friend/your own drawer for a pair of tights/stockings. Double layer over the inlet and one pre filter for next to nothing.

Also you can get pre filter socks which slip into the top of the snorkel.

Then you can go for a full pre filter cleaner bowl. They do not always work if you have a roll cage/light bar etc so take care if you go down that route.


Brendan
Post #160376 6th Aug 2012 7:39pm
View user's profile Send private message View poster's gallery Reply with quote
ZeDefender



Member Since: 15 Sep 2011
Location: Munich
Posts: 4731

Germany 2011 Defender 110 Puma 2.4 SW Baltic Blue
Thanks for the info - I'll consider wearing a sock next time Thumbs Up Tell someone you love them today because life is short.
But shout it at them in German because life is also terrifying and confusing...
Post #160380 6th Aug 2012 7:46pm
View user's profile Send private message View poster's gallery Reply with quote
quentin



Member Since: 23 Jul 2012
Location: on tour
Posts: 119

Australia 2004 Defender 110 Td5 SW Alpine White
May I add to the confusion about snorkle heads.

I go on a 3 month outback trip every 2 years (soon as this damn house sells will be going for 12 months)
Typically the 3 month is about 20-25,000 klm about 3/4 of that on unsealed outback roads / tracks whatever you want to call them.
We always go solo, never in a group, as hate eating other peoples dust. So the only dust we encounter is what we generate ourselves or from oncoming vehicles. In the case of road trains on dirt roads we always pull over as they are a mobile dust storm,

I might be wrong but the way I see it is facing a ram head backwards is counterproductive, it is not only makes it harder for the engine to breathe, it also sucks in more dust.

Basic Aerodynamics

Click image to enlarge


assume the tennisball is your snorkle head, When the snorkle is pointing forwards (to the left in picture) it sucks in all the air (including dust) that is in its path.

When the snorkle head is pointing backwards (to the right) it sucks in the air which is also now also mixed with dust from the sides past the edge of the snorkle head , so its getting more dust when pointed backwards.

That said Ive done some tests with my Nanocom plugged in & the Mass Air Flow readings are pretty much the same, on the same bit of road at the same speed with the Ram head forward, back or off all together.

Ive found that absolutely the best RAI head for dusty outback work is the Donaldson style cyclone pre cleaner,enough dust gets in there to need emptying out once a week. But they do mike a fair sucking noise & gets annoying around town.

Basically I have 3 snorkle heads that I use, The Safari Ram head pointed forwards for interstate highway work, I get about 120 klm extra per diesel fill ups on the 850 klm Melbourne - Sydney run. ( I have 170 litre fuel capacity)
For general running about and doing construction site & bushwork I use a Toyota cyclonic pre cleaner, and for extended outback trips I use the Donaldson pre cleaner.

I use the Toyota pre cleaner because its quieter than the Donaldson , I cant quantify how much dust spins out of it because it does not trap the dust in a bowl. The dust gets spun out the slots in the top.

Toyota Pre-cleaner

Click image to enlarge


Donaldson pre cleaner

Click image to enlarge



Dust problem is so bad that i also installed one (Donaldson air cleaner & RAI with pre-cleaner) on my Caravan, Uses a marine bilge fan to pump clean air into the van, thus stopping any dust getting sucked in, which is a huge problem if you go vanning in the desert.

Click image to enlarge
Post #161044 9th Aug 2012 11:49pm
View user's profile Send private message View poster's gallery Reply with quote
Glynparry25



Member Since: 16 Feb 2009
Location: Miserable Midlands
Posts: 3015

Wales 2009 Defender 110 Puma 2.4 XS DCPU Tonga Green
quentin wrote:
May I add to the confusion about snorkle heads.
I might be wrong but the way I see it is facing a ram head backwards is counterproductive, it is not only makes it harder for the engine to breathe, it also sucks in more dust.

Basic Aerodynamics

Click image to enlarge


assume the tennisball is your snorkle head, When the snorkle is pointing forwards (to the left in picture) it sucks in all the air (including dust) that is in its path.

When the snorkle head is pointing backwards (to the right) it sucks in the air which is also now also mixed with dust from the sides past the edge of the snorkle head , so its getting more dust when pointed backwards.


This is where you have to remember that sand/dust particles are much heavier than air and therefore the area just behind the snorkel (Tennis ball) will contain way more air than dust as it weighs considerably less. The powder in the wind tunnels are even lighter than dust.

quentin wrote:

That said Ive done some tests with my Nanocom plugged in & the Mass Air Flow readings are pretty much the same, on the same bit of road at the same speed with the Ram head forward, back or off all together.


Turbo engines work off pressure- therefore unless there is a physical restriction (too small a diamiter tube or restrictive filter) the turbo will suck the required air from the atmosphere to provide the engine. So it won't matter what you do with the snorkel head (as I mentioned earlier about the irrelevance of the 'ram air' affect)

quentin wrote:

Ive found that absolutely the best RAI head for dusty outback work is the Donaldson style cyclone pre cleaner,enough dust gets in there to need emptying out once a week. But they do mike a fair sucking noise & gets annoying around town.

Basically I have 3 snorkle heads that I use, The Safari Ram head pointed forwards for interstate highway work, I get about 120 klm extra per diesel fill ups on the 850 klm Melbourne - Sydney run. ( I have 170 litre fuel capacity)
For general running about and doing construction site & bushwork I use a Toyota cyclonic pre cleaner, and for extended outback trips I use the Donaldson pre cleaner.


I have a Donaldson type (ARB) on mine permenently as I spend morte time off-road than on road. I empty it every couple of weeks in the summer. I know what you mean about the sucking/ whirling sound.... I just put up with it, lol

It really does open your eyes to how much dust would make it down to the engine filter if you didn't have a pre-filter of any sort

Glyn Dog Sheep
Post #161074 10th Aug 2012 10:13am
View user's profile Send private message View poster's gallery Reply with quote
T1G UP



Member Since: 08 Dec 2009
Location: Bath
Posts: 3101

England 2011 Defender 110 Puma 2.4 XS CSW Orkney Grey
neither.

daft things and most are car park flags anyway.
Post #161076 10th Aug 2012 10:19am
View user's profile Send private message View poster's gallery Reply with quote
JWL



Member Since: 26 Oct 2011
Location: Hereford
Posts: 3443

England 2002 Defender 110 Td5 SW Coniston Green
Anyone who has worked in farming at this time of year will know about the effectiveness of the pre-cleaner bowls. In dusty cultivating conditions you can be cleaning the bowls out on a hard working 6litre tractor engine 2/3 times a day sometimes more.
Post #161077 10th Aug 2012 10:33am
View user's profile Send private message View poster's gallery Reply with quote
megatoad



Member Since: 07 Jan 2012
Location: Hertfordshire
Posts: 358

United Kingdom 2006 Defender 110 Td5 XS CSW Zambezi Silver
Just to sway this topic off line briefly but its that time of year again, insurance renewal!!

I got a reasonable renewal from my current insurerer but thought I would try Price comparison sites.

A certain pachyderm named site quoted £300 fully comp whoopee!

When I called them to confirm the insurance and mentioned any vehicle mods/extras when I got to the "Snorkel" they stopped me there and said they dont cover snorkels as I may off road the car !!!!

Indeed my current company, named after a senior naval rating, are actually a sister company of the aforemantioned, they could therefor look at my existing policy and informed me that I should have been rejected by them too as there was no mention of a snorkel!!

As for another rant, when I spoke to a company advertised in LRM as a specialist insurer, similar name to the county town of a Yorkshiremans nemesis, I was informed they did not cover vehicles with more than 8 seats !!!!

So beware fitting a snorkel without discussing it with the weasels that take your money every year who may or may not cover you in the event you havnt specified every extra nut, bolt etc on your car.

Rant over Very Happy
Post #161100 10th Aug 2012 12:08pm
View user's profile Send private message View poster's gallery Reply with quote
quentin



Member Since: 23 Jul 2012
Location: on tour
Posts: 119

Australia 2004 Defender 110 Td5 SW Alpine White
megatoad wrote:
Just to sway this topic off line briefly but its that time of year again, insurance renewal!!

I got a reasonable renewal from my current insurerer but thought I would try Price comparison sites.

A certain pachyderm named site quoted £300 fully comp whoopee!

When I called them to confirm the insurance and mentioned any vehicle mods/extras when I got to the "Snorkel" they stopped me there and said they dont cover snorkels as I may off road the car !!!!

Indeed my current company, named after a senior naval rating, are actually a sister company of the aforemantioned, they could therefor look at my existing policy and informed me that I should have been rejected by them too as there was no mention of a snorkel!!

As for another rant, when I spoke to a company advertised in LRM as a specialist insurer, similar name to the county town of a Yorkshiremans nemesis, I was informed they did not cover vehicles with more than 8 seats !!!!

So beware fitting a snorkel without discussing it with the weasels that take your money every year who may or may not cover you in the event you havnt specified every extra nut, bolt etc on your car.

Rant over Very Happy


Um Hello , Its a Landrover, isnt it meant to go off road.

Are they saying that Landrovers without snorkles dont go off road.
So that implies they wont insure a new Landcruiser GX because it comes from the factory fitted with a snorkel

and they should be ashamed of themselves, I've never seen a pachyderm without a snorkel
Post #161117 10th Aug 2012 1:11pm
View user's profile Send private message View poster's gallery Reply with quote
tolley



Member Since: 07 Nov 2011
Location: gloucester
Posts: 1114

United Kingdom 2006 Defender 90 Td5 CSW Oslo Blue
Post #161123 10th Aug 2012 2:34pm
View user's profile Send private message View poster's gallery Reply with quote
markb110



Member Since: 22 May 2010
Location: Guildford
Posts: 2620

England 2002 Defender 90 Td5 HT Epsom Green
Hi Tolley

Not used one of those but i have taken this picture from Andrew S gallery as it looks like Land Rover has done the job already

Regards

Mark


Click image to enlarge
Post #161126 10th Aug 2012 2:44pm
View user's profile Send private message View poster's gallery Reply with quote
quentin



Member Since: 23 Jul 2012
Location: on tour
Posts: 119

Australia 2004 Defender 110 Td5 SW Alpine White
I believe the theory behind the hiclone thing in the Td5 & Puma airbox is there to act as a centrifuge & spin the dust out & into the duckbill valve at the bottom.

they are also fitted into the ductwork of 80 and 100 series land cruisers before the air cleaners, big improvment in breathing by tossing them in the rubbish bin.

If you have a remapped Td5 you can benifit from extra airflow by pulling that piece of junk out, and cutting back the tube extension into the airbox, nobody ever cleans the dust from the drain valve anyway so its a waste of space.

better off to use a cyclonic precleaner on a raised air intake

as far as turbulating the airflow, any turbulance is lost as soon as the air passers thru the filter.
Post #161132 10th Aug 2012 3:01pm
View user's profile Send private message View poster's gallery Reply with quote
GREENI



Member Since: 22 Aug 2010
Location: staffs
Posts: 10379

United Kingdom 
Quentin, I'd love see what else you've done to the 'van, or even just a 'lowdown' on the whole thing? Thumbs Up
Looks fab Cool
Post #161133 10th Aug 2012 3:05pm
View user's profile Send private message View poster's gallery Reply with quote
Post Reply  Back to top
Page 2 of 3 <123>
All times are GMT

Jump to  
Previous Topic | Next Topic >
Posting Rules
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



Site Copyright © 2006-2024 Futuranet Ltd & Martin Lewis
DEFENDER2.NET RSS Feed - All Forums