why does a car over steer?
-
anyone?
-
A car usually understeers if you're turning (FF cars) at high speedOriginally posted by dryver:anyone?
Oversteering means your car have an inertia on the tail that shifts the car to swing more in the direction of the steering.
Can be controlled by turning the steering wheel in the opposite direction of the swing. Remember to steer to nuetral or stop the car. -
oversteer is, to put it simply, too much steering by a car.
OH-FF has left a lot out of his explanation. There are a few kinds of oversteer, all of which are produced when the rear wheels lose grip. As to why they lose grip, the one he has described, is what's called lift-off oversteer. There are several other forms of oversteer, but most which can be classed into the category of "wheelspin" oversteer, where the rear-driven wheels are spinning at a different rate to the rate of linear travel, thus causing a breakage in traction and causing the rear to slide. The other kind of oversteer are caused by a breakage in traction between the rear wheels and the ground due to the rear wheels being locked. We can call this sort of oversteer "wheel lock" oversteer. These 2 forms of oversteers can occur without any need to use weight transfer to initiate them, but generally oversteering, or "drifting" often uses a combination of all 3, weight transfer, wheel spin and wheel lock, to initiate and then control a drift. -
Theres also power oversteering.. but im too lazy to explain
-
that goes in the "wheelspin category"Originally posted by nOrmalbOi:Theres also power oversteering.. but im too lazy to explain
-
okies!Originally posted by HENG@:that goes in the "wheelspin category"
but im still too lazy to explain
-
power oversteer can simply be explained as, u stamp on the gas pedal, in a car powerful enuf, the engine's torque overwhelm's the tyre's grip and causes the wheels to spin faster than the car is moving. there is a break in traction and the rear slides.Originally posted by nOrmalbOi:okies!
but im still too lazy to explain -
This only happens in a Rear Wheel Drive car.Originally posted by HENG@:power oversteer can simply be explained as, u stamp on the gas pedal, in a car powerful enuf, the engine's torque overwhelm's the tyre's grip and causes the wheels to spin faster than the car is moving. there is a break in traction and the rear slides.
please also explain the difference in the configuration of the transmission.
Note what car/cars is relevant. -
uh yeah do notice that i've already explained way above when explaining "wheelspin" oversteer, that i already place emphasis on the driven rear wheels. doesn't that already imply that its at least a RWD car?Originally posted by OH-FF:This only happens in a Rear Wheel Drive car.
please also explain the difference in the configuration of the transmission.
Note what car/cars is relevant.
and u're actually mistaken on this, because even sophiscated cars like the Nissan Skyline GT-R34 with its complicated computer controlled torque split 4WD system CAN power oversteer. -
Front-wheel-drive? Possible to over-steer, say other than the mis-judgement of the driver for turning more than needed.
-
its nearly impossible to oversteer an FF car at high speeds, or any speed for dat matter. dats the reason y u dun find FF cars in D1 races.Originally posted by OH-FF:A car usually understeers if you're turning (FF cars) at high speed
Oversteering means your car have an inertia on the tail that shifts the car to swing more in the direction of the steering.
Can be controlled by turning the steering wheel in the opposite direction of the swing. Remember to steer to nuetral or stop the car.
for an FF car to oversteer, it requires hell lots of weight transfer or locking of ur rear wheels with the handbrakes to make the rear lose traction.
the weight transfer can be induced by either dumping ur clutch and engine braking from high rpm or jamming ur brakes and turning ur steering as u feel the weight taken off the rear. even then, an FF car would still require certain amounts of rear end rigidity to effectively translate the directional change into sideways lateral movement as the tail becomes lighter. if not, an FF car will always tend to understeer. -
theskyline can over steer because it has a 4wd system that employs a central differential that can vary torque distribution between the front and rear wheels. Usually when turning into a corner, the skyline is in rwd. as it oversteers, torque may be channeled to the front wheels to aid the car maintain or regain it's front/rear grip balance.
the EVO works in much the same way,except it cannot have 100% torque transfer to the rears.
so, in theory at least, these cars are easier to drift, due to the car aiding the driver.
er, heng@? -
some people here know what they are talking about. some don't.
-
Hahaha..easiest way to explain is
Car got power(torque) when in corner, the torque force the tyre to turn thus the tyre lose grip (spinning)so become sliding sideways...but front tires still gripping(sort of) -
that'd be lift off oversteer, or wheel lock oversteer.Originally posted by wbucket:Front-wheel-drive? Possible to over-steer, say other than the mis-judgement of the driver for turning more than needed. -
in theory the EVO ends up doing more of a 4 wheel drift, while the skyline is more able to do a true powerslide.Originally posted by dryver:theskyline can over steer because it has a 4wd system that employs a central differential that can vary torque distribution between the front and rear wheels. Usually when turning into a corner, the skyline is in rwd. as it oversteers, torque may be channeled to the front wheels to aid the car maintain or regain it's front/rear grip balance.
the EVO works in much the same way,except it cannot have 100% torque transfer to the rears.
so, in theory at least, these cars are easier to drift, due to the car aiding the driver.
er, heng@?
best car for powersliding? Porsche 911 GT3. That whole chunk of inertia at the rear helps loads. -
I have to disagree a bit. Lift off oversteer usually happens at high speeds. Taking the FIA ETCC cars as an example, the Alfa 155 touring cars are FWD. They've often invited some drivers from other series such as F1 drivers to come drive a single race as a special invite. Many drivers especially those from F1, often spin the cars because they make the mistake of lifting off thru corners. In a RWD car like a F1 car, lifting off is often used to control the nose of the car as it slides wide, or to tame the rear if it steps out. In a FWD touring car, at very high speeds, sometimes they make the mistake of using the same technique, resulting in a high speed spin due to lift off oversteer. Drivers who've made this mistake includes Giancarlo Fisichella. As u see, lift off oversteer CAN and does happen at high speeds in FWD cars. In fact, it is much harder to get lift off oversteer in FWD cars at medium to low speeds. Thats why they're not used in the D1 drift series. D1 drift series, actually drift at low to medium speeds, not high speeds as the human eye is tricked into believeing. I'd judge most of those drifts to be done at speeds between 50 to 80km/h which are fairly low speeds, when compared to actual racing speeds. We have to remember what we deem a "high speed drift" in the world of drifting is, in absolute terms, actually fairly low speed. That is why D1 drifters don't use FWD cars.Originally posted by tailslide:its nearly impossible to oversteer an FF car at high speeds, or any speed for dat matter. dats the reason y u dun find FF cars in D1 races.
for an FF car to oversteer, it requires hell lots of weight transfer or locking of ur rear wheels with the handbrakes to make the rear lose traction.
the weight transfer can be induced by either dumping ur clutch and engine braking from high rpm or jamming ur brakes and turning ur steering as u feel the weight taken off the rear. even then, an FF car would still require certain amounts of rear end rigidity to effectively translate the directional change into sideways lateral movement as the tail becomes lighter. if not, an FF car will always tend to understeer. -
How would it be induced? In the un-intentional sense. I have heard of people jamming brakes and end up doing a 180 turn, would it be similar case? Just want to know what to expect when I cut a corner with my little car.Originally posted by HENG@:that'd be lift off oversteer, or wheel lock oversteer. -
in lift off oversteer, it is induced when u lift off the throttle at very high speeds in a FWD car. It can be countered when u step on the acceleator again to use the power-understeer typical of a FWD car to neutralise it. Following it up with left foot braking would be a very good way to regain control if it happens to be under a loss of control circumstances. Avoid lifting off your right foot again and slamming it down on the brakes as it would induce lift off overtseer again, and then excaberating the situation when the all 4 wheels lock up.Originally posted by wbucket:How would it be induced? In the un-intentional sense. I have heard of people jamming brakes and end up doing a 180 turn, would it be similar case? Just want to know what to expect when I cut a corner with my little car.
For wheel lock oversteer, that is caused by pulling up sharply on the handbrake, and releasing it, to cause a momentary loss of traction with the rear wheels. A longer pull would allow a driver to clear a sharp corner if he has entered it too fast. note that, this method, is usually not the fastest way of clearing hairpins. Its more for loose surfaces commonly found in rallies, and on a packed surface, such a method of turning corners usually results in an untidy exit, which requires additional time to "tidy" up b4 u can get on the gas again. But if u ever find yourself over cooking a corner, it might just be enuf to enable u to avoid having an accident, if u've practiced it enuf. Its also useful for showmanship drifting n driving, aka showboating. -
SUCK UP!Originally posted by dryver:some people here know what they are talking about. some don't. -
Then there is also torque steering. But let's not go into that.
-
torque steer. thats nasty.Originally posted by ditzy:Then there is also torque steering. But let's not go into that. -
then how u explain when i am trail braking then the rear suddenly snaps???Originally posted by HENG@:that'd be lift off oversteer, or wheel lock oversteer. -
u locked the rear loh. simple. your trail braking still need to practice a lot.Originally posted by AE86tofu:then how u explain when i am trail braking then the rear suddenly snaps??? -
Oversteering is not recommended for Road Safety.
Wheels thats out of traction in any situation is considered reckless in road safety.
Anyway, most racers who goes for Speed makes controlled turns to save tires and also traction for better acceleration out of corners.
Its the clock of the routes. Not the stunts. Unless you're such a spoilt show-off brat. Then waste your $$$ on cars.