Infiniti G20 Nissan Primera Forum banner

1 - 5 of 5 Posts

·
Registered
Joined
·
139 Posts
Discussion Starter #1
Good sound systems benefit from quiet cars, so I've been fiddling around with my 2.0 '94 UK Primera. Engine noise on cruising is very low so I concentrated on wind and road noise. Wind noise at 70mph can be a problem, I found good reductions with:-

Smoothing out the shape of vertical windscreen rubbers to blend in to the glass better. I used some old windscreen rubbers and black RTV.
Taping over some of the vent holes at the bottom of the windscreen, the ones that lie above the bonnet (hood) line.
Tape over the drain hole in the side mirrors - not sure if this will cause any problems long-term, I've never found any water come out when I remove the tape.

Road noise is down to finding quiet tyres, I use Uniroyal Rallye 540's but there's probably better ones. The other problem is that tyre noise gets into the car rather easily, so I listened with a tube to my ear (with someone else driving!) and a lot of noise gets in under all four doors, probably noise conducted through the sill that escapes into the car as the door rubber seal is the wrong side of the door to offer any protection. Thick foam rubber around the bottom and about a foot up each side of each door made a big difference to noise levels as it closes off the escape route.

Now I can have music on quietish, set at 30mph, that I can still listen to at 80mph without turning the volume up, whereas before I definitely had to turn everything up some way to compensate for road/wind noise. This gives benefits all round at all volumes.
 

·
Registered
Joined
·
139 Posts
Discussion Starter #3
OK, you asked for it! This is not pretty as I haven't yet been able to find black or dark grey foam rubber apart from a small amount I already had, but it does make it easier to see in the photos, most of it being brown on the doors.


http://www.sbrads.freeserve.co.uk/pictures/backdoor1.jpg
http://www.sbrads.freeserve.co.uk/pictures/backdoor2.jpg
http://www.sbrads.freeserve.co.uk/pictures/frontdoor1.jpg
http://www.sbrads.freeserve.co.uk/pictures/frontdoor2.jpg
http://www.sbrads.freeserve.co.uk/pictures/vents.jpg
http://www.sbrads.freeserve.co.uk/pictures/windscreen.jpg

I can't guarantee to keep these pics posted for more than a couple of months (restricted webspace).

It's probably not necessary to go as high up the back doors as I did. I still can't believe how quiet the car is compared to when I bought it at 72,000m (now 132,000m) when shod with Dunlop SP200 tyres and none of this extra (cheap) soundproofing. You could hardly hear youself speak at 80mph then. Now I can hear a whisper.
 

·
Registered
Joined
·
117 Posts
You're right it is kinda ugly lol but it doesnt matter because you cant see it once the door is closed. I'll have to look into that though...and try to find me black foam.
 

·
Registered
Joined
·
139 Posts
Discussion Starter #5
I've just found another modification along with the others that reduces wind noise even further now, no blustering noises in headwinds now even at 90mph. Using 1/2" wide black electrical tape, tape round the hinged opening all round the side mirrors to smooth out the overall shape. These nooks and crannies make all sorts of noises! Just don't knock the mirrors as they won't swivel too easy now.
 
1 - 5 of 5 Posts
Top