Drafty windows
Discussion
I took the drvers side door apart and turned the window runners upside down so that the compressed (worn) parts were reversed, this has done a great job of tightening the flappy door glass. However it still bl@@dy whistles at Mway speed ( worse with cold air vent open). IF you open the opposite window this seems to relieve the cabin pressure and the whistling stops. Has anyone tried holes in the panel to the boot? Most cars have pressure equilizing holes but i havent seen any on Cerb cabin, and i've looked closer than most!
I have exactly the same problem that I've been trying to solve for months. The pressure equalisation holes are hidden under the lower edge of the rear screen. I've read that there were two modifications, one reduced the pressure by placing foam in the inner wing space the other introduced more 'holes' at the rear of the car somewhere.
My windows fit quite well but at motorway speed the pressure is sufficient to pop them out of their seals. I've also noticed a big difference in airflow through the vents with the windows closed and slightly open.
It seems to me that there are too many opening in the front of the car and too few at the rear. Is anyone aware of design changes for later models, mine is a 1997 4.5.
My windows fit quite well but at motorway speed the pressure is sufficient to pop them out of their seals. I've also noticed a big difference in airflow through the vents with the windows closed and slightly open.
It seems to me that there are too many opening in the front of the car and too few at the rear. Is anyone aware of design changes for later models, mine is a 1997 4.5.
Brummie
Have you got any info/images re the boot vents? Sound mad but I'm going to try a short drive with the boot wedged slightly open to see if this drops the pressure in the cab sufficiently. If it works boot vents might seem feasible but how would you prevent exhaust fumes or water entering. I guess they would need to be some sort of one way flap valve design.
Have you got any info/images re the boot vents? Sound mad but I'm going to try a short drive with the boot wedged slightly open to see if this drops the pressure in the cab sufficiently. If it works boot vents might seem feasible but how would you prevent exhaust fumes or water entering. I guess they would need to be some sort of one way flap valve design.
Arent there some very small holes/vents at the bottom of the rear screen, under the lip that meets the boot? Well mine seems to whether by design or not. Sitting in my car at a hand carwash, the chappie sprayed the power washer in the gap and I got a squirt of water on the back of my head!
Im reasonably sure of a way to reduce the motorway wind noise/ possibly help the windows situation but havent yet been able to try it...
It involves a couple of (very) small parts from a Sagaris.
If you're interested it involves buying and fitting the Sagaris's extension for the wing mirrors. Its an extra piece, which moves the wing mirrors further away from the body/ glass. It should get rid of alot of the pressure difference around the front area, reducing noise and the amount the screen is effectively pulled out - in theory atleast.
It involves a couple of (very) small parts from a Sagaris.
If you're interested it involves buying and fitting the Sagaris's extension for the wing mirrors. Its an extra piece, which moves the wing mirrors further away from the body/ glass. It should get rid of alot of the pressure difference around the front area, reducing noise and the amount the screen is effectively pulled out - in theory atleast.
Edited by BCA on Tuesday 21st August 22:47
Can't say I get any of this cabin pressure and window popping stuff in mine. Not that I'm disappointed
There are 4 holes behind the rear wheels, from the boot compartment on mine, ( i have discovered.), But not much in the way of transfering the pressure from the cabin to the boot. A hole from the cabin to the boot could be the answer and a rubber cat flap type thing. Thats how normal cars work. The external holes on "normal" cars are often behind the rear bumper.
Ffirg 005 said:
Just had a look at my stripped down shell. There are holes big enough to put your hand through at the base of each C pillar that run from the cabin to the boot - unless those are covered up by trim there should be plenty of airflow there...
Have you seen/ got any pictures of where the rear of the cage attatches to.. err nothing? We'll be wanting to change that when we do the body-off, but it'll be a while till we get to that stage. 
Ffirg 005 said:
Just had a look at my stripped down shell. There are holes big enough to put your hand through at the base of each C pillar that run from the cabin to the boot - unless those are covered up by trim there should be plenty of airflow there...
Could you tell me exactly where these holes are as my cab and boot are fitted with carpets throughout. Some time ago I'm sure I heard about a modification involving vents in the sill. Would these holes also feed into the sill cavity? If so, I guess it would be possible to vent the sills under the car.
There are two sets of two pipes in the floor of the boot on the right and left:
and a large hole at the base of the C pillar on each side:
the hole is pretty big...
and a large hole at the base of the C pillar on each side:
the hole is pretty big...
BCA said:
Have you seen/ got any pictures of where the rear of the cage attatches to.. err nothing? We'll be wanting to change that when we do the body-off, but it'll be a while till we get to that stage.
Here's a couple of the rear roll cage mounts. They bolt through to the outrigger.jonbarrett said:
Some time ago I'm sure I heard about a modification involving vents in the sill. Would these holes also feed into the sill cavity? If so, I guess it would be possible to vent the sills under the car.
I really don't see why you'd want to vent through the sills to be honest...Gassing Station | Cerbera | Top of Page | What's New | My Stuff