Hood vents

[M3onTwomps]

According to bmw.com, the hood vents are actually intakes:

"Intakes of up to 17m cubed of air per minute."

[E90Fleet]

You can see the little intake in the engine pics posted

[swamp2]

I started this discussion here

There is two intakes to the airbox one in the front fascia and one (prob. two in the CSL) in the hood. I can´t entirely figure out why there are two.

[E90Fleet]

Originally Posted by swamp2

I started this discussion here

There is two intakes to the airbox one in the front fascia and one (prob. two in the CSL) in the hood. I can´t entirely figure out why there are two.

To get enough air in there

The M5 and M6 also have extra engine airintakes from the brake ducts to get enough air in

[bullitt5897]

ok of the two intakes on the hood 1 is for the airbox and the other is for cooling the engine bay seeing as it is on the other side and has a direct opening to the headers. just my 2 cents.

[swamp2]

Why have an intake in the front fascia (brake duct area or otherwise) in a high pressure area (ram air intake effect) AS WELL AS and intake in the hood in a very low pressure area (which will "suck" instead of force).

BTW, exactly the question I posed on my OT...

[E90Fleet]

Originally Posted by swamp2

Why have an intake in the front fascia (brake duct area or otherwise) in a high pressure area (ram air intake effect) AS WELL AS and intake in the hood in a very low pressure area (which will "suck" instead of force).

BTW, exactly the question I posed on my OT...

Obviously at full throttle the front intakes cannot supply enough, since its said the top one "sucks" " up to 17m cubed of air per minute"

[M3onTwomps]

Yes, the reason I created this thread is because some at M3forum.com seem to think the vent is actually an exhaust.

[monsta]

Originally Posted by M3onTwomps

Yes, the reason I created this thread is because some at M3forum.com seem to think the vent is actually an exhaust.

[esquire]

the two air intakes on either side of the front fascia are fed to cool the brakes, so the ram effect is really inconsequential here.

[jtown]

What happens with fluid (or anything else) that goes down that intake pipe?

[E90Fleet]

Originally Posted by jtown

What happens with fluid (or anything else) that goes down that intake pipe?

The pipe probably makes a 90 degree or more bend for the air.
The liquid will want to continue traveling straight and not go round the bend
It will then probably drain out a drain hole

This is often reffered to as a inertial seperator intake.


As soon as there is technical info avialble we will post it

[swamp2]

Originally Posted by esquire

the two air intakes on either side of the front fascia are fed to cool the brakes, so the ram effect is really inconsequential here.

From the press release,

"Front end designed for maximum air intake. The front end of the car boasts three large air intake scoops beneath the radiator grille serving to feed intake and cooling air to the engine. The air intake scoops border on either side on large, vertical bars and further enhance the characteristic design language of the car."

I read this that all three intakes feed either the engine intake or cooling. We know as well that the side ducts feed cooling air to the brakes. You can see as well that the airbox has two intakes, one obviously connects to the hood the other must obvisouly connect to somewhere in the front fascia. The large central intake is probably exclusively for radiator cooling, thus leaving the side intakes for engine and brakes. So with engine intake here at the front fascia, in a high pressure zone, I think there should be some ram effect.