KeylessGo

Hello all

Previous Cayennes had the active grille that was closing and opening as per need.
But on the new model , including mine , I never saw it closed . Is it intended ? can be fixed ? Or is another Porsche example of rushing things.

chassis

What happens if you look at the active grille first thing in the morning, when the car is very cold?

KeylessGo

It is open, it never closed

E'TLS

If you haven't said so, I don't even know the front grille has flaps and will close. Mine is always wide open.

If it closes at highway speed, then I won't be able to see.

KeylessGo

The previous gen was closing when very cold outside,also at highway ,also when car is off, that is the normal working way.
But this one is never closing , which is not normal

sand8

Check this out here:
Flap condition

KeylessGo

On a 2023 GTS it is certainly closing ,that also has the sport design front

MaxLTV

Are there shutters there? If there are, check if they are movable by hand, just see if they are designed to move. If they are, go to a dealer and maybe check other cars of the similar model?

I had one of side radiator shutters fail. Initially, it would always stay open. I asked the dealer if that was ok, and they said they did not know. Few weeks later it showed an error message and was repaired under warranty. But that was a side radiator rather than the central one, and on the 2019 Turbo. I don't know about the central radiator on 2024.

KeylessGo

Just checked — there are shutters that look closable but i did only move them slightly ( there was resistance ,feared I might break something)

In one of the Porsche 2024 launch clips i clearly saw a 2024 with sport design package and flaps closed

So … it looks again like a porsche bug

rdboxster

In the 9Y0.1 the shutters are part of the aerodynamics to reduce drag. There is a document regarding the aerodynamic development that was posted probably by @Schnave . The blades should be close except for when cooling is needed. The ones on the 22 close when the vehicle is off. I suspect you need to have the dealer look at this. There may even be a code they can pull.

Schnave

Here’s my post about the difference between the horizontal center radiator flaps and the vertical intercooler flaps. I’ve also attached the document.

From the Journal of Automobile Engineering article titled, “The aerodynamic development of the new Porsche Cayenne”:
“. . . the aim of the development was to lower the drag as a contribution towards the reduction of fuel consumption and emissions.”

Cooling drag, which is the drag due to the engine cooling airflows, can contribute up to 10% of total vehicle drag. Therefore, Porsche incorporated adaptive radiator flaps to reduce cooling drag when cooling is not needed. When fully closed, the flaps reduce total drag by 6%. [End of nerd stuff!]



It may surprise you that the engine normally runs without turbo boost. My boost gauge shows zero except when I’m feeling frisky and pounding the throttle — no inter-cooling is needed most of the time. So the flaps stay closed and Porsche meets the WLTP emissions requirements. But when you do need boost, you need it quickly and you need inter-cooling just as quick. Do the flaps open fast enough? Read on . . .

Here’s the cool part: The airflow flows through the horizontal center radiator flaps straight-on. But the airflow starts splitting and flows at a 40° angle towards the vertical intercooler flaps.




So what? The center flaps have to open almost to 90° for full airflow. Since the airflow at the intercoolers is already traveling at a 40° angle, the flaps only have to open just 44° to achieve 99.7% airflow. (See chart).

To quote the article, “This enables a very short response time in the case of cooling and power demands from the engine.” So win-win. Reduced drag during most engine operations and very quick adaptation to inter-cooling when needed.

retom

I think the new MY2024 has no flaps. At least they're not on intercoolers. I don't see them also in the spare parts catalog for My2024 either.
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chassis

I checked this twice today.

1. Ambient temp 40F. Car at operating temperature, then turned off for 1.5 hours. Side and center flaps were closed.
2. Repeat test 1. Same result, all flaps closed.

Electric Lizard

Very interesting article. Thanks for posting it.

rajatparihar

The my24 e hybrid doesn’t have adaptive flaps. They are always open. Another setback from Porsche in this 2024 models?