Arch Louvres from Jetstream
Discussion
Jarcy said:
TVR left them filled in on the production Sagaris for this very reason. Fine for a race car but a little impractical for road perhaps?
That's a load of PR tosh, the manufacturing process already had them there, they then left them in because the additional cost in time to cut them out slowed down the process of churning them out and making money. No sign of any stones pinging out of mine and I've driven some s
tty roads with them.Hollowpockets said:
That's a load of PR tosh, the manufacturing process already had them there, they then left them in because the additional cost in time to cut them out slowed down the process of churning them out and making money.
No sign of any stones pinging out of mine and I've driven some stty roads with them.
I would believe anything regarding TVR towards the end of Smolensky's reign. I stand corrected! They look cool though, on both the Sag and the M12. Very nice.No sign of any stones pinging out of mine and I've driven some s
tty roads with them.
I see how the Sagaris louvres may work as they project up into the boundary layer somewhat and should create a thinner boundary layer over the remaining wing /door roof etc.
Surely the flush louvres are gong to create a thicker boundary layer and counteract what you are trying to do which is reduce overall drag?
I may be missing the point here but I am considering doing this myself and want it to work as intended.
Flame suit at the ready
ETS, not a reflection on the work done here, they all look well fitted finished.
Surely the flush louvres are gong to create a thicker boundary layer and counteract what you are trying to do which is reduce overall drag?
I may be missing the point here but I am considering doing this myself and want it to work as intended.
Flame suit at the ready
ETS, not a reflection on the work done here, they all look well fitted finished.
Edited by F.C. on Thursday 23 May 07:53
F.C. said:
I see how the Sagaris louvres may work as they project up into the boundary layer somewhat and should create a thinner boundary layer over the remaining wing /door roof etc.
Surely the flush louvres are gong to create a thicker boundary layer and counteract what you are trying to do which is reduce overall drag?
I may be missing the point here but I am considering doing this myself and want it to work as intended.
Flame suit at the ready
It's a good point. You'd only really know by stuffing the car in a wind tunnel and watching. Guessing how it'll work doesn't seem to work, just ask the McLaren F1 guys this year!Surely the flush louvres are gong to create a thicker boundary layer and counteract what you are trying to do which is reduce overall drag?
I may be missing the point here but I am considering doing this myself and want it to work as intended.
Flame suit at the ready
I can be 100% sure that the TVR ones were for show! They might work as well, but they were done for show.
If the slats are doing their job a lot of air will be pumping out of them so that may help/not help. However if you're NOT getting stones hitting your windscreen it suggests either the air is running down the side of the car, not good, or they're not working! Not good again!
I thought long and hard about doing them on front of my car... but as phil said, if they work they will pump water etc through them and possibly onto the windscreen (which is what happens on the Ultima)... I wasn't prepared to take the chance. hence I am venting the front wheel arches in the normal way down the door.
As yet I have not opened up the vents in my rear clip as if they are too efficient they may add turbulent air to the rear spoiler and ruin downforce...
As yet I have not opened up the vents in my rear clip as if they are too efficient they may add turbulent air to the rear spoiler and ruin downforce...
When it next starts chucking down ill go for a drive and get my passenger to take pictures of the vents to see what's happening and report back, when I don't wash my car for months the dirt actually follows the airflow around the canards, gurneys etc and paints a pattern showing what's going on, an uneducated guess is that just above the lights the air separates from the clam, some goes down the side and the rest goes over the roof but not much happens on that flat surface where I've put the vents.
I think the gurney has a huge influence on the air going over the roof as I discovered a couple of weeks ago when driving in the rain when my wipers stopped working. Normally the rain droplets would be pushed up the windscreen with the wind speed I found at 80mph the droplets above mid level on the windscreen would do as normal and go up but the few inches in the middle they wouldn't move AND the lower half of the windscreen the droplets started rushing back down the windscreen towards the clam... ??? Very odd to see at 80-100mph. Take that as you will though but it looks to me there is maybe low pressure area at the bottom of the windscreen so I'm hoping the vents will make use of that if there really is as much pressure in the front wheel arches as the wind tunnel suggests.
Interesting topic though.
I think the gurney has a huge influence on the air going over the roof as I discovered a couple of weeks ago when driving in the rain when my wipers stopped working. Normally the rain droplets would be pushed up the windscreen with the wind speed I found at 80mph the droplets above mid level on the windscreen would do as normal and go up but the few inches in the middle they wouldn't move AND the lower half of the windscreen the droplets started rushing back down the windscreen towards the clam... ??? Very odd to see at 80-100mph. Take that as you will though but it looks to me there is maybe low pressure area at the bottom of the windscreen so I'm hoping the vents will make use of that if there really is as much pressure in the front wheel arches as the wind tunnel suggests.
Interesting topic though.
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