Snorkel question

Got to agree with Wayne. If you are in someones dust for more than a few minutes, you are too close.

Imagine that you dont see a big washout, and roll your car. You'll feel like a complete turkey. Just sit back out of the dust

I have a snorkel on my Patrol (4.2TDi) and had one on my Landrover, and personally found no difference in performance or economy with head of snorkel facing either way. Landrover had a very slight drop with the cyclonic head on it, haven't tried one on Patrol.

TrolUte

So says the man WITHOUT a snorkel . . .

I agree with it though ; )

I know a couple of guys that turn their snorkel heads around in dust. In one it makes no fuel difference , but does seem to keep some dust out. There other certainly notices the extra fuel use (Jeep, straight six).

Well, before those ram intake thingies became common, snorkels had a centrifugal dust separator fitted. My ageing troopie came with one, it works perfectly in dusty conditions. You can see the buildup of dust in the clear bowl and know when it required emptying.
I use the ram thingie for driving around town and the centrifuge in the bush on dirt roads & tracks.
Klaus

"So says the man WITHOUT a snorkel . . "

Hey flappan, just because I can't get one for the Pathy doesn't mean I haven't had one ... long before you could actually buy one from a 4x4 shop [wink]

Klaus, agreed, and that's certainly the best option if you are able/willing to have and carry both. In fact, if you can put up with the ugly look of it, the centrifugal one is the best for all applications (if keeping foreign matter out of the engine is your prime concern).

V8Troopie has the best idea the Donaldson Pre-cleaner for the bush and the ram for the city, the Pre-cleaners are fugly things but from personal experience they do work, imagine where that dust in the bowl would be if you didn’t have the pre-cleaner on, about the ram effect I recall reading an American hot rod book years ago where they did an experiment on the salt flats were they made a ram the size of the frontal area of the car and gained 1-2 %, so the effect of pointing the ram fwd should gain about .000001%.
As for sucking in dust a 4.2 litre engine with a volumetric efficiency of 85% consumes about 2500 litres of air per minute at idle and about 7000ltres of air at 2000RPM so at 100kmh it will even try to draw the air backwards i.e. from behind the snorkel.
Stew