Beezztie

Took my 911 for a drive today and with low traffic put the pedal to the metal so to speak. But beginning at approx 115 mph (180kmh) a terrible, screaming, noise appeared, becoming louder the faster I drove. Difficult to determine where it came from but almost has te be something on the outside and wind related. When I turned around and drove the other direction, wind in the tail instead of coming from the front, it started at higher speed. Cannot find anything wrong, when I activate the wipers sound stays, sunroof open and closed does not make difference. Do not find anything wrong or missing underneath the car, at least not as far as I can tell. Anyone ever experienced something similar?

rtl5009

Matt(inMA)

Did you check the person in the passenger seat?

Matt

rwdds

A section of the flexible, accordion-like weather seal may have failed. At high speed, the wind pressure could cause a loud resonance. Just a guess...

Meursault88

When I was looking for a 997 I recall a guy selling his because of a loud whistle while at high speed. He made a youtube video for it. I'll look

Meursault88

Couldn't find the video but found this - https://rennlist.com/forums/997-foru...igh-speed.html

nosnow

Check all the plastic cladding in the trunk especially the battery cover to make sure it is fastened properly. When I was researching 997s someone had traced a similar issue down to an improperly seated battery cover.

Beezztie

Thanks! I must say that recently after I wanted to close the Battery cover at one side the screw did not seat properly. At some point after fiddling a bit it seemed OK but maybe it was not. Something to check (and a good excuse to make another run at illegal speed :-) )

Beezztie

The sound did remind me of my wife but she was at home at that time (at least that's what she told me).

Bruce In Philly

Could it have been a wheel bearing? If so, it will start making noise at lower speeds as it fails.

For wind noise..... take some painter's tape and put strips of it in suspect places.... go for a drive.... repeat.

Peace
Bruce in Philly

groovzilla

Porsche Boxster suffers from similar whistling noise at high speeds due to front hood raising slightly once the car reaches speeds over 100mph - So it could be your hood.

TheBruce

Sure it wasn't the police sirens?

Wayne Smith

Interesting problem. My wife's hood starts to vibrate at 140 mph with air trying to escape onto the windshield. Damned airflow.

Good luck tracking this down.

DesmoSD

It could be your mirrors

https://rennlist.com/forums/997-foru...r-whistle.html

Mumbles

She may be in the frunk ?