718GT4 cruising speed sound change/droning noise

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03-02-2020, 09:29 PM

#16

ExMB

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My 2020 Macan remembers the AS setting.

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MRflat6 (03-03-2020)

03-02-2020, 09:53 PM

#17

dmk2

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What is the RPM at 70 MPH in sixth gear?

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03-03-2020, 02:03 AM

#18

BRNGT4

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So the Start/Stop button does indeed disables the "cylinder deactivation".. very good news indeed. The droning sound when its running on 3 cylinders is not comfortable at all.

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03-03-2020, 07:13 AM

#19

TDT

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Quote:

Originally Posted by EYEHAVEYOU

It's the cylinder deactivation, you're running on 3 cylinders. Turn auto-start off and you won't have to deal with that anymore

Correct

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03-03-2020, 09:24 AM

#20

MRflat6

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Quote:

Originally Posted by Mr.Speed

I think that also can be related to emissions regulation... Strange that BMW remember that setting

In Europe it remains manual for emissions, but in the US auto start stop once pressed off, stays off.

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911F1 (03-03-2020), blackholescion (03-03-2020)

03-03-2020, 10:48 AM

#21

Mr.Speed

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Yes, i can confirm that. Never had a car here in Europe, witch remember Start/Stop setting.
And just checked my GT4, need to press button every time you start the car.

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03-03-2020, 02:08 PM

#22

Archimedes

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Quote:

Originally Posted by MRflat6

In Europe it remains manual for emissions, but in the US auto start stop once pressed off, stays off.

Awesome. That's what I figured.

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03-23-2022, 06:08 AM

#23

Jeff Van Arsdale

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Quote:

Originally Posted by BRNGT4

So i noticed at when i reach cruising speed and the car is no longer accelerating, the engine sound changes significantly. It sounds like a droning noise and you can actually feel it in the backrest of the seat. The mechanic in me is telling me this is some sort of fuel conservation mode. Maybe cylinders switching off? Does anyone know anything about this? I cant find any information in the car manual or online.

yes half the cylinders deactivate at low load crushing speeds for better fuel efficiency . The information is out there because I’ve read all about it and even informed porsche salesman about this feature that even some porsche representatives have zero knowledge of ! I own one and I knew this before I ever test drove one .