i heard somewhere that a snorkel will give you more power and better gas mileage. is this true? i know it won't be much but every little bit helps. i assume it would be the same as a cold air intake.
power gain from a snorkel?
- Thread starter asurover
- Start date
nope...put one on mine about 4 months ago...no difference...but it looks cool and keeps the water out
Theoretically it should reduce your Hp.
THink about trying to suck air through a straw or a garden hose... It takes a lot more effort to get air through something that is longer and therefore starving your engine the freedom of easy breathing.
Again.... theoretically
THink about trying to suck air through a straw or a garden hose... It takes a lot more effort to get air through something that is longer and therefore starving your engine the freedom of easy breathing.
Again.... theoretically
Asolo3j said:Theoretically it should reduce your Hp. THink about trying to suck air through a straw or a garden hose... It takes a lot more effort to get air through something that is longer and therefore starving your engine the freedom of easy breathing.
Again.... theoretically
But then again, if the snorkel is drawing cooler air from outside the engine compartment, there might be a HP gain. . . theoretically.
Seriously, there are two reasons to have a snorkel. It's great if you plan to do deep fording or if you plan on driving in a very dusty environment. (Typically trail dust is thicker closer to the ground where it is kicked up by the tires. Raising the air intake can lengthen the life of the air filter, and save wear and tear on the motor.) People who install snorkels do so without regard to horsepower, as the primary benefits outweigh the gain or loss of a percent or two.
Wait, third reason: looks cool.
The safari snorkel, if moutned pointed foward, will theoretically act like an air ram, and combine that with cooler air and theroetically you may see minimal gains. I had mine mounted foward for less then a week before I turned it around. I didnt notice any gains. It wouldnt be on the list if looking for porformance gains. Anyone try the air foce one intake?
http://www.roveraccessories.com/airforceone.htm
http://www.roveraccessories.com/airforceone.htm
S
Sirfoss
Guest
Air Force 1
I have a couple of customers with them. I will ask what they think. I almost think they did it because they didnt want that plastic on the side.
Mike
I have a couple of customers with them. I will ask what they think. I almost think they did it because they didnt want that plastic on the side.
Mike
"The safari snorkel, if moutned pointed foward, will theoretically act like an air ram"
I believe the only Hp gaing air rams are those wich alow for a greater amount of air flow to a direct intake! I dunno, say a HEMI or a Ram Air induced Firebird or a Porsche GT1. Those all have direct air inducdion that also relies on the force (apparent wind) of the air flow into the intake. They also do so without bends in the intake and air flow restriction. Relate that to exhaust.... the straighter the flow = more Hp! Lets not forget the entire market for mandrel bent pipes.
Cold air intakes work because they are taking in cooler air and a more direct flow so that cool air can be used by the engine. A snorkel will restrict the flow of air and because of the sheer volume of air that must move you would have to be going really friggin fast to have it act like an air ram. I don't see our rovers hitting any sort of speed needed for that.
I believe the only Hp gaing air rams are those wich alow for a greater amount of air flow to a direct intake! I dunno, say a HEMI or a Ram Air induced Firebird or a Porsche GT1. Those all have direct air inducdion that also relies on the force (apparent wind) of the air flow into the intake. They also do so without bends in the intake and air flow restriction. Relate that to exhaust.... the straighter the flow = more Hp! Lets not forget the entire market for mandrel bent pipes.
Cold air intakes work because they are taking in cooler air and a more direct flow so that cool air can be used by the engine. A snorkel will restrict the flow of air and because of the sheer volume of air that must move you would have to be going really friggin fast to have it act like an air ram. I don't see our rovers hitting any sort of speed needed for that.
D
doc1911
Guest
I have no proof, but I think it would be a long shot to think the forward facing safari snokel will act as a ram air intake. I have one. The angles, twists and turn the tubing takes would all but negate the "ram" effect
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gadams
Guest
I don't remember the specific equations but resistance to fluid flow is directly related to the length of the conduit and directly related to the (I think) second power of the radius of the conduit. As I see it, snorkels have tubing (conduit) that is not significantly larger than stock air intakes (mantec looks smaller) but the tubing (conduit) is LOTS longer. the net result is increased resistance to flow and should result in less HP. This doesn't even take into account the conduit bends causing turbulence or in the case of the safari snorkel, irregular shaped conduit resulting in more turbulent flow, all of which increases resistance. IMO, the main advantage of the snorkels are as described above: out of the water, less dust, cool looks.
Greg
Greg
I have run asafari snorkel on my scout for more then a decade
I used to connect and disconect it and check the MPG both ways
on hot days on the highway it always got about 2 to 3 MPG better with it connected. I had dozens of tankfuls under the same conditions on long trips to wheeling destinations to see this and it repeated the same result over and over.
now my truck runs headers and a huge V8 so under hood temps are way higher then one would like or see in a disco. I have always thought that the reason this for this huge gain in MPG is because the cool air as aposed to the hot under hood air.
I put it on for deep water and deep water alone ...but I always get preocupied with MPG so I had to test
I used to connect and disconect it and check the MPG both ways
on hot days on the highway it always got about 2 to 3 MPG better with it connected. I had dozens of tankfuls under the same conditions on long trips to wheeling destinations to see this and it repeated the same result over and over.
now my truck runs headers and a huge V8 so under hood temps are way higher then one would like or see in a disco. I have always thought that the reason this for this huge gain in MPG is because the cool air as aposed to the hot under hood air.
I put it on for deep water and deep water alone ...but I always get preocupied with MPG so I had to test
Snorkel = Ram Air Induction NOT
Let's talk about Bernoulli's Principle. Simply stated, and for the purposes of this discussion, it provides that there is an inverse relationship between air speed and air pressure. What does that mean in practice? That a ram air duct must be placed somewhere on the car where there is relatively low airspeed. The air there will be at a higher pressure. It is no accident that radiators are almost always at the front, and that the vents for the passenger compartment are always at the base of the windshield. These are the areas where the air flow is the worst, but air pressure is the greatest. Also notice that most ram air systems are located on the hood, near the back of the hood, and many of them even face backwards! Worst places for air intakes: at the point where the grill meets the top of the hood and the point where the windshield meets the roof. The air is moving the fastest there, and if you put a vent there the venturi effect could even suck air out of the vent!
Thank you Mr. Wizard.
LostInBoston said:
Let's talk about Bernoulli's Principle. Simply stated, and for the purposes of this discussion, it provides that there is an inverse relationship between air speed and air pressure. What does that mean in practice? That a ram air duct must be placed somewhere on the car where there is relatively low airspeed. The air there will be at a higher pressure. It is no accident that radiators are almost always at the front, and that the vents for the passenger compartment are always at the base of the windshield. These are the areas where the air flow is the worst, but air pressure is the greatest. Also notice that most ram air systems are located on the hood, near the back of the hood, and many of them even face backwards! Worst places for air intakes: at the point where the grill meets the top of the hood and the point where the windshield meets the roof. The air is moving the fastest there, and if you put a vent there the venturi effect could even suck air out of the vent!
Thank you Mr. Wizard.
K
Kyle
Guest
But wait, there's more!
Check out this Schmude snorkel for the Mercedes G-Wagen. The opening faces backwards, on the aerodynamically turbulent side of the snorkel. The air pressure there is greater. It's not for a Ram Air effect, but to lessen the venturi effect mentioned above.
Here is a photo of the rear of the snorkel.
Check out this Schmude snorkel for the Mercedes G-Wagen. The opening faces backwards, on the aerodynamically turbulent side of the snorkel. The air pressure there is greater. It's not for a Ram Air effect, but to lessen the venturi effect mentioned above.
Here is a photo of the rear of the snorkel.
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syoung
Guest
I can't believe ANYONE would want to put one of those stupid cone filters on a Disco. Hot air, water... the fact that cotton filters are almost always worse at filtering than paper...
It probably sounds good though.
It probably sounds good though.