A theoretical question
Discussion
What standard car or what performance levels would be required for a car to lose the traction at 85mph and in fifth gear?
As in you're travelling on a motorway, it's dry, good road surface and you have reasonably sized, good tyres. You're doing 85mph in fifth gear. And then you floor it.
Is there anything that loses traction in those conditions? I'm assuming AWD would be out of the question.
As in you're travelling on a motorway, it's dry, good road surface and you have reasonably sized, good tyres. You're doing 85mph in fifth gear. And then you floor it.
Is there anything that loses traction in those conditions? I'm assuming AWD would be out of the question.
Edited by rottie102 on Wednesday 31st August 00:59
Not sure on your original question, but I have a video of a Hennessey Ford GT (~1000bhp) getting some wheelspin at 140mph.
http://www.youtube.com/watch?v=FZmFGmIteXI
http://www.youtube.com/watch?v=FZmFGmIteXI
Gaz. said:
Surely a R500 at 85 in 5th is going to be well off cam & gutless? At that speed I wouldn't have thought it would have much more than 150bhp or 125 lbs.ft of torque, assuming it would be at 4.5k.
I can't think of any standard car that would do it.
5.3k assuming the non-sequential box and 22" diameter tyres.I can't think of any standard car that would do it.
So, say 200bhp. Minus 30hp aero drag at 85mph. Allowing for drive train losses that is still around 300bhp/tonne...hardly gutless
Thus about 2.9kN thrust. 600kg (including normal sized driver) car thus about .5g (4.8 m/s^-2) acceleration. Probably not enough to break traction on a dry road.
Im hazarding a guess that this is the result of a pub argument where a mate said he did this?
If everything is working properly in normal conditions then it can't really be done.
However I have heard of this happening a few times with people who have something wrong with the car but I can't remember what the common cause is.
If everything is working properly in normal conditions then it can't really be done.
However I have heard of this happening a few times with people who have something wrong with the car but I can't remember what the common cause is.
I once managed wheelspin at motorway speeds in my chipped Leon Cupra.
Floored it in 6th at about 70mph and saw the traction control light flicker.
This was last winter, and it turns out that while the road looked dry, it was very cold and greasy.
Panicked me a little as everyone was driving as if the road was dry, when in reality we only had about 25% of the grip we thought we had.
Floored it in 6th at about 70mph and saw the traction control light flicker.
This was last winter, and it turns out that while the road looked dry, it was very cold and greasy.
Panicked me a little as everyone was driving as if the road was dry, when in reality we only had about 25% of the grip we thought we had.
0aaaaaaaaaaaaaaa said:
A powerful heavily turbocharged FWD
I doubt it, because even in my (thoroughly modest) machine...85 is made for high end 3rd/shifting to 4th. To have it geared to get wheelspin at that speed, in 5th...unlikely I think.I don't think you will find a car that will do it in 5th at that speed which hasn't been messed with specifically to do it//really weird gear ratios.
I stand to be proven wrong, it will be interesting.
ETA: On a re-read my point is unclear - it was that as car get more powerful they are designed to sit (in general terms) in lower gears for longer and to higher speeds to maximise the power/acceleration - you're looking for something geared like a 1.0 but with the power of something silly.
Edited by roachcoach on Wednesday 31st August 10:29
Won't happen.
I'm not clever enough to show the calculations but the amount of torque required at the wheel would demand truly MONSTER torque from the engine.
Remember a gearbox is essentially a "torque multiplier". Most 5th gears are 1:1 ratio (or close to it) so there is no multiplication whatsoever. i.e. 1 x 1 = 1
There's just not enough torque to break traction.
I'm not clever enough to show the calculations but the amount of torque required at the wheel would demand truly MONSTER torque from the engine.
Remember a gearbox is essentially a "torque multiplier". Most 5th gears are 1:1 ratio (or close to it) so there is no multiplication whatsoever. i.e. 1 x 1 = 1
There's just not enough torque to break traction.
i agree that a car that is working as intended is very unlikely to do it, but it could be made to happen fairly easily.
600hp focus RS, boot loaded with bags of cement running comically overinflated space saver spares on both front tyres on a concrete motorway section, open diff (didn't say anything about both tyres spinning), terribly setup suspension etc. would probably get the job done, lol...
600hp focus RS, boot loaded with bags of cement running comically overinflated space saver spares on both front tyres on a concrete motorway section, open diff (didn't say anything about both tyres spinning), terribly setup suspension etc. would probably get the job done, lol...
Edited by Greg_D on Wednesday 31st August 12:28
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