Bugatti Veyron wheels? Mental.
Discussion
iSore said:
Tony Starks said:
And how often do 10 second drag cars need their engines rebuilding? I find it pointless comparing the veyron to these types of cars. Sure a 900 bhp Skyline might be quicker in some cases but I'd imagine it wouldnt last long sat in traffic then driven across europe.
Exactly. I've never driven one of course but I'd imagine a Veyron is a tremendous thing on a long trip. Some old Skyline or 700 bhp Nova (Chevrolet, not Vauxhall) would be quite unpleasant. At least you'd look good in a Nova waiting for the AA unlike the Skyline in your £3.75 Wilko trimmed mouse fur interior.Driving across Europe in a Veyron ? In motor journalists' dreams maybe. Most Bugattis rarely venture outside wherever oligarchs hang out - just like most hyper cars.Kensington and Cannes is the preferred habitat . And so practical and usable that they get delivered in a trailer to photoshoots .
Of course comparisons of the type I made are tongue in cheek but people wet themselves about Veyrons' speed - which is rarely , if ever used and which in absolute terms is not quicker in a straight line than a street legal drag car costing a twentieth as much nor as quick round a circuit as virtually any modern single seater - a Veyron wouldn't see which way a retired F3 car went. Across Europe..... you can't even drive a 330D(or whatever) at 150mph any significant distance .
Leptons said:
marmitemania said:
Valve caps do not seal the valves. You push the valve in to release the air and the centrifugal force as the wheel spins would force the valve core out, therefore sealing the valve. If the valve relied on a litlle plastic cap to keep the air in I would not be driving a car at any speed let alone 250 MPH.
That depends where abouts on the wheel the valve is mounted.marmitemania said:
No it does not depend on that at all. A little spring and the pressure in the tyre which is huge at even 20 psi keep the valve core closed. The only way centrifugal force would not keep the valve closed is if the valve was mounted horizontally in the centre of the wheel IE right in the very centre where the hub nut and the end of the drive shaft is, anywhere outside of dead centre and centrifugal forces will act. I can't believe that some people cannot grasp this.
I think someone needs to draw you a diagram, or you need to go outside and actually look at a car wheel.marmitemania said:
No it does not depend on that at all. A little spring and the pressure in the tyre which is huge at even 20 psi keep the valve core closed. The only way centrifugal force would not keep the valve closed is if the valve was mounted horizontally in the centre of the wheel IE right in the very centre where the hub nut and the end of the drive shaft is, anywhere outside of dead centre and centrifugal forces will act. I can't believe that some people cannot grasp this.
Not very clever are you. Allow me to explain:Imagine a wheel. Draw a centre line across the wheel. Now if the valve is mounted on the O/D of the wheel on the Centre line and the valve head is pointing Towards the centre of the wheel, in theory if the wheel spins fast enough the valve could open under its own weight.
The only way the Valve could keep itself shut is if it's mounted on the centre line with its head facing towards the O/D.
So yes. It does depend where the valve is mounted on the wheel.
Dapster said:
The whole financial pantomime around the Veyron is carefully planned - I mean, €300k extra cost option to not paint the Super Sport?
The problem with carbon-fibre bodied cars is that often it really is a lot cheaper to paint them. Getting an even, smooth, showroom surface finish with carbon is very, very tricky. If you paint over it, any of the (many) defects are readily hidden - the customer will never know just how much sanding and filler was needed. However, go down the unpainted route, and your carbon has to be perfect - especially if it's a Veyron or Zonda. No defects in the weave, lay-up, book-leafing across the car/panels, and so on. This means it might take a few attempts before you've got finished panels good enough to go on the car, with the rejected parts being quite expensive. So, in my opinion, the huge extra cost is not pantomime in this case, but quite justifiable given the manufacturing process.Leptons said:
marmitemania said:
No it does not depend on that at all. A little spring and the pressure in the tyre which is huge at even 20 psi keep the valve core closed. The only way centrifugal force would not keep the valve closed is if the valve was mounted horizontally in the centre of the wheel IE right in the very centre where the hub nut and the end of the drive shaft is, anywhere outside of dead centre and centrifugal forces will act. I can't believe that some people cannot grasp this.
Not very clever are you. Allow me to explain:Imagine a wheel. Draw a centre line across the wheel. Now if the valve is mounted on the O/D of the wheel on the Centre line and the valve head is pointing Towards the centre of the wheel, in theory if the wheel spins fast enough the valve could open under its own weight.
The only way the Valve could keep itself shut is if it's mounted on the centre line with its head facing towards the O/D.
So yes. It does depend where the valve is mounted on the wheel.
coppice said:
Driving across Europe in a Veyron ? In motor journalists' dreams maybe. Most Bugattis rarely venture outside wherever oligarchs hang out - just like most hyper cars.Kensington and Cannes is the preferred habitat . And so practical and usable that they get delivered in a trailer to photoshoots .
Of course comparisons of the type I made are tongue in cheek but people wet themselves about Veyrons' speed - which is rarely , if ever used and which in absolute terms is not quicker in a straight line than a street legal drag car costing a twentieth as much nor as quick round a circuit as virtually any modern single seater - a Veyron wouldn't see which way a retired F3 car went. Across Europe..... you can't even drive a 330D(or whatever) at 150mph any significant distance .
I take it you know every veyron owner and the mileage they do?Of course comparisons of the type I made are tongue in cheek but people wet themselves about Veyrons' speed - which is rarely , if ever used and which in absolute terms is not quicker in a straight line than a street legal drag car costing a twentieth as much nor as quick round a circuit as virtually any modern single seater - a Veyron wouldn't see which way a retired F3 car went. Across Europe..... you can't even drive a 330D(or whatever) at 150mph any significant distance .
I'm sure more then a few have done the odd Gumball/Gold rush rally which is a bit more than driving around Kensington.
ecsrobin said:
I expect Lord Pembrokes veryron to be getting close to that if it hasn't already passed it.
http://www.helluvit.co.uk/index.php?go=news&id_news=29Extract from the interview:
Q: It would be scary to calculate how much the Veyron costs per mile.
A: Well, it’s done over 10,000 miles now. It’s a fairly high mileage one. Three trips to Germany! Get up really early and get out on the Autobahn and you can really enjoy it.
coppice said:
Driving across Europe in a Veyron ? In motor journalists' dreams maybe. Most Bugattis rarely venture outside wherever oligarchs hang out - just like most hyper cars.Kensington and Cannes is the preferred habitat . And so practical and usable that they get delivered in a trailer to photoshoots .
Of course comparisons of the type I made are tongue in cheek but people wet themselves about Veyrons' speed - which is rarely , if ever used and which in absolute terms is not quicker in a straight line than a street legal drag car costing a twentieth as much nor as quick round a circuit as virtually any modern single seater - a Veyron wouldn't see which way a retired F3 car went. Across Europe..... you can't even drive a 330D(or whatever) at 150mph any significant distance .
To be fair, I suspect that of all the true supercars, this is the one that gets used. I have seen so many out and about, unlike its peers. Of course comparisons of the type I made are tongue in cheek but people wet themselves about Veyrons' speed - which is rarely , if ever used and which in absolute terms is not quicker in a straight line than a street legal drag car costing a twentieth as much nor as quick round a circuit as virtually any modern single seater - a Veyron wouldn't see which way a retired F3 car went. Across Europe..... you can't even drive a 330D(or whatever) at 150mph any significant distance .
I just assume that as its a VW and there is no limit to how many you can but then people don't give a crap about banging the miles onto them. Obviously, it's not 330D, but I've always had the feeling that a lot of owners did use them a lot more than you'd expext.
marmitemania said:
Leptons said:
marmitemania said:
No it does not depend on that at all. A little spring and the pressure in the tyre which is huge at even 20 psi keep the valve core closed. The only way centrifugal force would not keep the valve closed is if the valve was mounted horizontally in the centre of the wheel IE right in the very centre where the hub nut and the end of the drive shaft is, anywhere outside of dead centre and centrifugal forces will act. I can't believe that some people cannot grasp this.
Not very clever are you. Allow me to explain:Imagine a wheel. Draw a centre line across the wheel. Now if the valve is mounted on the O/D of the wheel on the Centre line and the valve head is pointing Towards the centre of the wheel, in theory if the wheel spins fast enough the valve could open under its own weight.
The only way the Valve could keep itself shut is if it's mounted on the centre line with its head facing towards the O/D.
So yes. It does depend where the valve is mounted on the wheel.
BigBen said:
King Herald said:
None of you rocket scientists have ever seen a proper valve cap then: metal, with an o ring seal inside? No, thought not.
Ah you mean like the ones not used on the wheels of most cars?http://en.wikipedia.org/wiki/Schrader_valve
"Some valve caps have a rubber-washer seal (or a synthetic-rubber-washer seal) inside to help make a hermetic seal (airtight seal). Such a rubber-washer-sealing-type cap also helps prevent air from escaping from a slightly leaking valve".
http://www.tirerack.com/tires/tiretech/techpage.js...
"High-speed pressure loss and core contamination are several of the reasons why valve caps should always be used. In case anything disrupts the valve core's seal, the valve cap provides a backup seal that prevents air from escaping. And while using valve caps will make it take longer to check tire pressures in the pits at a racetrack, the consequence of having a tire lose pressure is much worse".
http://www.agcoauto.com/content/news/p2_articleid/...
"The valve stem cap is extremely simple, yet misunderstood and can be the cause of a good many problems. Tires that do not hold air are often caused by missing valve stem caps. Vehicles often come in for wheel alignment only to find a low tire, caused by a missing valve stem cap"
"The Schrader valve is intended to allow for inflation, deflation and as a temporary seal. It is not designed to be a full-time seal. Sealing the stem is the job of the valve stem cap. Without the cap, the tire will eventually loose air."
Need I go on, stating the obvious and the sensible? What do you all naysayers seem to think the gain is by denying the logical??? If you're happy to do 100mph with your tyre air held in by the same valve core your child's bicycle has in its tyres, feel free, but I like to err on the side of caution.
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