Turbo Intake Air

Hey, you know how alot of mid-engine race cars have turbo snorkels for the intake air like the Nissan R390 , Audi R8, etc. My question is that instead of using those protuding snorkels, why don't they get the intake air from underneath the car?

this is what the R8, R390 GT1, etc have

http://img.photobucket.com/albums/v178/NewyorkKopter/s.jpg

why dont they use this way instead of the snorkel that probably add drag?
http://img.photobucket.com/albums/v178/NewyorkKopter/f.jpg

the R390 and its turbo snorkels
http://perso.wanadoo.fr/dreamscar/Nissan%20R390%20GT1%20b.jpg

the R8 and its turbo snorkels

http://www.marmoset.plus.com/images/silverstone/Audi-R8-800x600.jpg

I would guess because the way the car is streamlined, makes it more beneficial to have it on top.

but then again if you get rid of the snorkels, the drag will definetly decrease.

the drag may decrease if they get rid of the snorkle, but i'm sure that they get better airflow, cleaner air, and less resistance into the turbo which probably helps spool up by using the snorkle.....

it keeps them from sucking up debris

and there's barely any air moving under those cars....

and the air under the car is under slight vacuum already

so wait what would happen if they used the car under the air?

the air under the car is dirty, full of debris, in a vaccuum, and wouldn't like to enter the engine so there would be resistance to flow which would slow the spool of the turbos and slow the car down. The aerodynamics will suffer very little but the engine likes the nice clean air up top.....

thats true, but what if you put a air filter to prevent anything from entering the compressor section of the turbo?

the underside of a race car is a fairly intense vacume whereas the air above the car is higher pressure. Not to mention that it is very difficult to design an undertray that will create the most downforce without having to worry about intakes. Drag is not a huge deal because that can be overcome with a little more power, but downforce is quite hard to come by.

this should be in the aerodynamics forum (that doesn't exist) that i suggested a while ago.

o for a second there I was like where? where is it?
but can you find a way to effienciently design the underside of a car, and incorporate intakes for the turbos into it?

o for a second there I was like where? where is it?
but can you find a way to effienciently design the underside of a car, and incorporate intakes for the turbos into it?

If you want your car to fly off the road...like literally leave the payment. You can reduce drag on the underneath of a car, but to actually direct air underneath there for an intake is stupid. Cars are streamlined so the fluid flows over the car, not underneath which helps give downforce and better aerodynamics. Getting rid of the scoop on top would eliminate minimal to neglible drag on that car. If your building a car for a top speed record, then yes, an alternate location might be better to squeeze every tenth of a mph for top speed. For a car like this, its serves no real benefits.

Gotta remember that there is a pressure drop in that scoop as well... So it isn't really "drag" in the situations that this particular car runs in. It is kinda the same thing as pushing a vacuum cleaner hose forward...

^^haha, love that

I'll just come out and say "NO! You don't put the turbo intake below the car. Period."

and im saying why not :iceslolan

We already told you.

hehe yea I know, I was just saying for arguments sake

you already have all the answers to your question...

and im saying why not :iceslolan
That's what "period" is for. It means "Shutup because the explanation requires a higher IQ to understand than you currently have."







just for arguments sake :disappoin

whoa ok take it easy. anyone can see how high your IQ is

i thought the cars were designed to have very fast air moving underneath, not much but the air that does goes faster than on top. this is because of bernouli's principle about how fast air provides less pressure in directions other than where it's moving. kinda like an upside down airplane wing.

And puting scoops under a car would interupt this, slow down the air and remove downforce. even if it did raise your top speed it would make it incredibly hard to control and would lower your cornering speed and g's (the more important part of the race, how often do cars actually reach their top speed?).

tru

i thought the cars were designed to have very fast air moving underneath, not much but the air that does goes faster than on top. this is because of bernouli's principle about how fast air provides less pressure in directions other than where it's moving. kinda like an upside down airplane wing.

And puting scoops under a car would interupt this, slow down the air and remove downforce. even if it did raise your top speed it would make it incredibly hard to control and would lower your cornering speed and g's (the more important part of the race, how often do cars actually reach their top speed?).
You're thinking backwards. Yes, the side that has the faster moving air is the side with the lower pressure, forcing the object to move that way. Cars are just like wings. The lower pressure on top and higher pressure underneath. It's the bubble shape that causes this, just like a wing. Lowering the car and smoothing out the area underneath lowers the pressure below the car to at least, if not more than, that pressure on top of the car.

You want to create a vacuum underneath the vehicle, where in stock form there is positive pressure(or at least more than what is above the car).

kopter dude.....maybe I'd cool it if you just paid attention rather than asking the same question 20 times.

tru
It's "true"

Is one more keystroke THAT hard to do?! I mean come on, 1 letter. Just press the damned thing!!

kopter dude.....maybe I'd cool it if you just paid attention rather than asking the same question 20 times.
okay, I'll stop :smokin: