Discussion
Hi all,
Before my car is painted in a couple of weeks time, I am thinking of adding some vents to the front and rear clams. I know a few people have already done this (mainly on BLACK cars :-)). Before I upset the painter to tell him he has a load of holes to cutout, I thought I'd ask what peoples opinion of them is.
As far as my limited knowledge goes, the idea is to reduce the pressure build up under the clam by venting the pressure from the wheelarches. Is this correct?
If so then is it necessary to duct the air out by having a scoop under the vent, or is a simple cutout sufficient? Properly designed vents like yours Wayne look fantastic, but I don't think I have the time or money to make them up.
The vents on the Sagaris look great...
...but the production car blanked them off due to stones flying up and hitting the windscreen.
So... what about a nice series of slightly curved vents with wire mesh to stop stones flying up? I loved the mods to the lime green car at Stoneleigh (sorry, forgot who's it is)... good job by the way!
Do you like them?
Will driving in rain be a pain? (Rooster Tails!!)
Do you need them at the rear?
Will they get through the SVA OK?
Cheers,
Mart
Before my car is painted in a couple of weeks time, I am thinking of adding some vents to the front and rear clams. I know a few people have already done this (mainly on BLACK cars :-)). Before I upset the painter to tell him he has a load of holes to cutout, I thought I'd ask what peoples opinion of them is.
As far as my limited knowledge goes, the idea is to reduce the pressure build up under the clam by venting the pressure from the wheelarches. Is this correct?
If so then is it necessary to duct the air out by having a scoop under the vent, or is a simple cutout sufficient? Properly designed vents like yours Wayne look fantastic, but I don't think I have the time or money to make them up.
The vents on the Sagaris look great...
...but the production car blanked them off due to stones flying up and hitting the windscreen.
So... what about a nice series of slightly curved vents with wire mesh to stop stones flying up? I loved the mods to the lime green car at Stoneleigh (sorry, forgot who's it is)... good job by the way!
Do you like them?
Will driving in rain be a pain? (Rooster Tails!!)
Do you need them at the rear?
Will they get through the SVA OK?
Cheers,
Mart
The trouble is they do look good until you start driving in the wet when all manner of muck comes out of them and spreads itself down the wing and top of the door.
Show queen or practicality is the choice to be made.
Steve
PS. If you are going to do them, then they have to be properly sculpted and blended in. It is no good just cutting some holes through the GF as they will look crap and we will laugh at you behind your back.
Show queen or practicality is the choice to be made.
Steve
PS. If you are going to do them, then they have to be properly sculpted and blended in. It is no good just cutting some holes through the GF as they will look crap and we will laugh at you behind your back.
Hi Martin, the front vents on the green car work a treat, they do have a small rooster tail in the rain, but they clear the screen, as in, the wet from them doesn't touch the screen at all, admittedly the s
t does come through them a little but a quick swill off with a bucket of water soon sorts that out ! The reason for the rear ones was to let a bit more heat out from the rear clip, so I put them in for a purpose.
And they do look good to me.
Oh, and she ain't no show queen!
t does come through them a little but a quick swill off with a bucket of water soon sorts that out ! The reason for the rear ones was to let a bit more heat out from the rear clip, so I put them in for a purpose.And they do look good to me.
Oh, and she ain't no show queen!
Edited by highflyer on Tuesday 12th August 07:43
Davrianman said:
Hi all,As far as my limited knowledge goes, the idea is to reduce the pressure build up under the clam by venting the pressure from the wheel arches. Is this correct?
If so then is it necessary to duct the air out by having a scoop under the vent, or is a simple cutout sufficient? Properly designed vents like yours Wayne look fantastic, but I don't think I have the time or money to make them
Hello Martin, you are correct in your understanding of how the vents are designed to work and no, it is not necessary to to duct the air to alleviate the pressured wheel arch. If so then is it necessary to duct the air out by having a scoop under the vent, or is a simple cutout sufficient? Properly designed vents like yours Wayne look fantastic, but I don't think I have the time or money to make them
I too did not have the time and NOW I also don't have the money
No need to tell you Martin but remember, any non standard mods that you make are what will set you apart from any other builder, so do it right
On a side note, I was with P yesterday @ Snetterton and as the day drew to a close a race truck arrived, 'Group C racing' it had written down the side, and from it emerged the most gorgeous LM type open top racer and as we were dribbling over it and getting sweaty, P pointed out the front wing 'panel type vents' and said that is what he would be interested in for X8. Initially when I began talks with SSS about said items this is also what I had in mind but what you now see is how things eventually turned out but in retrospect I think that the panel vent is certainly worth following up and would be ideal for many as a latter addition and thus no SVA issues, just a thought.
I doubt the factory will supply them if they are not SVA compliant. As i understand it they have various agreements not to supply parts that will not pass the SVA. For example I don't think they supply front tow hooks (for road use), side vents (bit behind the wheel) and front splitters. This does not stop somebody else doing them
Those reverie carbon side vents...
will they pass the SVA I wonder? anyone found out?
Surely any mod done (within reason), provided they comply ref the 'rolling' ball test for edges, will be OK?
..and in ref to bonnet/wing vents, I can understand front facing raised vents to be tricky (ref the exposed leading edge),
but what about trailing vents? as their 'sharp' edge would not come into contact with anything, facing backwards... (unless the car was reversing at high speed of course!)
Would these pass the SVA?
Keith
will they pass the SVA I wonder? anyone found out?
Surely any mod done (within reason), provided they comply ref the 'rolling' ball test for edges, will be OK?
..and in ref to bonnet/wing vents, I can understand front facing raised vents to be tricky (ref the exposed leading edge),
but what about trailing vents? as their 'sharp' edge would not come into contact with anything, facing backwards... (unless the car was reversing at high speed of course!)
Would these pass the SVA?
Keith
Scotty-Boy said:
As I understand it, a sharp edge is a sharp edge irrespective of whatever way it faces if it can be contacted with a 10cm sphere.
Easy enough to make them with 2.5mm rounded edges so it doesn't become an issue.
If the item in question is GF then the radius required is only 1.5mm.Easy enough to make them with 2.5mm rounded edges so it doesn't become an issue.
Steve
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