Anybody got wind
Anybody got wind
Author
Discussion

SPR117T

Original Poster:

171 posts

252 months

Friday 4th March 2005
quotequote all
That's wind noise. Got it from both sides. Is it to be expected. I notice I could press door tighter to the seal but this effects the shut lines. My shut lines seem perfect. I suppose I could fit thicker door seal.

Any ideas

robp

2,097 posts

264 months

Friday 4th March 2005
quotequote all
Yep - plenty of windnoise mainly from driver side on mine, mostly above 80mph - so only notice it on track, of course

Marlon

735 posts

281 months

Friday 4th March 2005
quotequote all
You'll get plenty of wind noise when the air blower is on; from what I recall it alters cabin pressure sufficiently to impact the window seals... or I might be talking complete bollox. Anyway, it's much quieter if the blower is off - but there is still wind noise above 80 mph... it's not a terribly slippery design.

V6GTO

11,579 posts

265 months

Friday 4th March 2005
quotequote all
Putting the dial to re-circ helps no end.

Martin.

turbocup

40 posts

296 months

Friday 4th March 2005
quotequote all
Make sure recirc is set and make sure all the dash(and esp side.) vents are open.You won't believe how they can whistle when closed!

SPR117T

Original Poster:

171 posts

252 months

Friday 4th March 2005
quotequote all
Thanks for the tips guys. I'll try the recirculation.

joust

14,622 posts

282 months

Saturday 5th March 2005
quotequote all
From a previous post

yellowshed said:

joust said:

I was playing on the M20 on the way back on Saturday and noticed a very interesting effect....
If you either turn the blower off, or turn it to recirc, then the noise at 80-100 drops. I presume it's the air exiting the vents at the back of the car and getting sucked into the slipstream going over the car?
Try it - you'll be amazed! Given re-circ for me never really is fully recirc, and it should be left on recirc when you are using the aircon, I think I've stumbled upon something.
The M400 has spookily low levels of noise if you turn the blower fans off - it was so quiet at 80-90 (on the airfield just off the M20 of course ) that Nick fell asleep in the car, and it was only 5:00pm!
J

Justin,
This has been a known phenomenon for some time - the dynamic air pressure through the heater assy when on fresh air is enough, when combined with the change in air pressure outside the side windows at your testing speeds, to bleed air past the window seals and hence cause a whistle. Turning the air off or to recirc stops this.
YellowShed


Full thread here www.pistonheads.com/gassing/post.asp?r=1740044&t=147761&h=0&f=26&m=quoteReply&cb=074949

nozzer

30 posts

266 months

Friday 11th March 2005
quotequote all
SPR117T said:
That's wind noise. Got it from both sides. Is it to be expected. I notice I could press door tighter to the seal but this effects the shut lines. My shut lines seem perfect. I suppose I could fit thicker door seal.

Any ideas



That be me on the way home, all those curries at Paprika