Side intake acting as venturi?

[KRAM36]

A set of these ram air ducts would be nice, but Kokeln went out of business and I have not been able to find them anywhere.

[Lemming]

[QUOTE=KRAM36;593723]A set of these ram air ducts would be nice, but Kokeln went out of business and I have not been able to find them anywhere.

demonspeed has the driver side intake for about $100.

[pomerlo]

On my 2002 base. The shape of the air intake is different than the one on the passenger side(evacuation).

Look carefully at how the neck protrude at the fender surface. You will see that one goes out more than the other. In my opinion, this tuned by Porsche engineer ?

[maytag]

Originally Posted by pomerlo

In my opinion, this tuned by Porsche engineer ?

And? What's your point?
Is your suggestion that it shouldn't be messed with because it was designed by a Porsche engineer?
Let me ask then: do you think it was the same engineer who designed the IMS? or the 5-chain arrangement? Or the AOS system? Or the problematic and failure- prone oil-delivery? Or the window regulators? Or the cooling fan resistors? Or..... shall I go on?

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[pomerlo]

My point is the air intake or the heat exhaust vent have different shape exactly to prevent this venturi effect that the OP is talking about.

In my opinion, the AOS or the fan resistors and even the IMS are perfectly designed and all of those systems work for thousand and thousand miles like they are suppose to.

The fact that they fail on many cars, and I agree with you on this, is probably the consequence of suppliers who put crap in the material used to build the parts.

But again, this is just my non engineer opinion.

[maytag]

Originally Posted by pomerlo

My point is the air intake or the heat exhaust vent have different shape exactly to prevent this venturi effect that the OP is talking about.

Agreed!

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[KRAM36]

Originally Posted by pomerlo

On my 2002 base. The shape of the air intake is different than the one on the passenger side(evacuation).

Look carefully at how the neck protrude at the fender surface. You will see that one goes out more than the other. In my opinion, this tuned by Porsche engineer ?

On my 03 Boxster S, the passenger side (USA) vent pulls air into the engine compartment.

[Oldcarguy]

Originally Posted by KRAM36

On my 03 Boxster S, the passenger side (USA) vent pulls air into the engine compartment.

Exactly right. I don’t understand how the fallacy persists that the right side vent intake is an exhaust but I see it a lot.

If you want to prove it for yourself, when stopped place a strip of tissue paper over the vent when the engine compartment fan is running. Just be sure not to let it be sucked in.

It is true that heat radiates from the vent when stopped if the fan is not running but that is true for the entire mid/rear section of the car including the wheel wells.

[KRAM36]

Originally Posted by Oldcarguy

Exactly right. I don’t understand how the fallacy persists that the right side vent intake is an exhaust but I see it a lot.

If you want to prove it for yourself, when stopped place a strip of tissue paper over the vent when the engine compartment fan is running. Just be sure not to let it be sucked in.

It is true that heat radiates from the vent when stopped if the fan is not running but that is true for the entire mid/rear section of the car including the wheel wells.

I don't know why people keep saying this either? If people want proof, I'll hook up my Durametric and have it turn on the fan for that vent and video record a piece of paper being sucked to the vent.