Snorkle Questions

[jscusmcvet]

On the 97 Discovery I just bought, it has a Mantec snorkle. The PO attached to snorkle top with the opening facing rearward. Most that I have seen (if not all) have the snorkle facing frontward. From an air induction standpoint, it seems to make sense to have it facing forward.

Any input? Simple change if facing it forward is the right move.

Thanks,

John

 

[jscusmcvet]

Snorkle Question

The PO of the 97 Discovery I just bought had mounted the top to the Mantec snorkle with the opening facing backward. Most I have seen, on any vehicle, have them facing forward. Any benefit to either mounting style? It would seem to me that openign forward would have a better impact on air flow to the engine, which is usually a good thing.

Any thoughts for me?

John

 

[Dendy Jarrett]

Actually, the specs call for the one for a Range Rover Classic and the Disco to face rearward (LR3 does as well).
It was explained to me that more air actually gets in facing rearward with it "sucking from draft" than would with air moving so fast past the opening that it wouldn't take air in fast enough (think physics).

D

 

[X-plorenow]

plus I believe it helps to further clean the air somewhat.

 

[94Discovery]

you cannot do that in the mantec the head is not designed the same way ,the one pointed toward the front they have a system that evacuate the water , the mantec on it does not leave it facing backwards.

 

[Wander]

I believe to vortex principle is what feeds the air into the mantec snorkle, mine is the same way. It is also (IMHO) the cleanest snorkle set up for disco's

 

[jscusmcvet]

Thanks guys. Sorry for the double post. Thought the first one did not take.

I will heed your advice and leave the snorkle facing rearward.

John

 

[Dendy Jarrett]

I fixed it for you- Merged the two! Dendy

 

[jscusmcvet]

I believe to vortex principle is what feeds the air into the mantec snorkle, mine is the same way. It is also (IMHO) the cleanest snorkle set up for disco's

Hope you are surviving Irene OK. Thanks again for the advice.

John

 

[AxeAngel]

Actually, the specs call for the one for a Range Rover Classic and the Disco to face rearward (LR3 does as well).
It was explained to me that more air actually gets in facing rearward with it "sucking from draft" than would with air moving so fast past the opening that it wouldn't take air in fast enough (think physics).

D

Ram air intakes point forward. Another idea fornpointing rearwards that has been proven shows less dust and less rain going into the snorkel.

 

[Rocket Ship]

Actually, the specs call for the one for a Range Rover Classic and the Disco to face rearward (LR3 does as well).
It was explained to me that more air actually gets in facing rearward with it "sucking from draft" than would with air moving so fast past the opening that it wouldn't take air in fast enough (think physics).

D

Physics doesn't work that way.

Somebody in the general section did a really good test of the effects of backwards or forwards pointing snorkel, and the effect on airflow from either direction is negligible.

Forward looks cooler, and you can pretend you have Ram-Air. Rearward results in less dust and rain intake. ARB's pretty picture with the water being flushed out is pretty inaccurate in my experience. I always turn mine backwards in dust and heavy rain or snow.

 

[Nonimouse]

I've been playing with my snorkel recently - using different tops and a flow bench (like you test exhaust designs on)

I found that the 'periscope' types flow less air than the 'mushroom' types; but that a 75mm inlet Donaldson on a 65mm snorkel flowed more than both! So guess what I have now...

 

[AxeAngel]

Physics doesn't work that way.

Somebody in the general section did a really good test of the effects of backwards or forwards pointing snorkel, and the effect on airflow from either direction is negligible.

Forward looks cooler, and you can pretend you have Ram-Air. Rearward results in less dust and rain intake. ARB's pretty picture with the water being flushed out is pretty inaccurate in my experience. I always turn mine backwards in dust and heavy rain or snow.

No increase in airflow due to the distance from the snorkel intake to the throttle body, and the restrictions in pipe between the two. A study was done on a racing application with a shorter path from "snorkel" to throttle body and the effects of ram air were proven/

-Sam

 

[Antichrist]

I found that the 'periscope' types flow less air than the 'mushroom' types; but that a 75mm inlet Donaldson on a 65mm snorkel flowed more than both! So guess what I have now...

Another advantage of them, at least the good ones, is that they are also centrifugal pre-cleaners.
Donaldson, Sy-Klone, Centri, Enginaire.
I'm sure there are others.

BTW, Engineaire also makes something that looks like it would be good in deserts and other high dust areas, Cabaire, http://www.enginaire.com/Cabaire.htm

 

[Rocket Ship]

No increase in airflow due to the distance from the snorkel intake to the throttle body, and the restrictions in pipe between the two. A study was done on a racing application with a shorter path from "snorkel" to throttle body and the effects of ram air were proven/

-Sam

Oh, I don't doubt the possibilities of Ram-Air on applications which are aerodynamically designed.

The ARB, was not. Hard 90° turn right below the inlet? Hardly.