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Practical Corner Weighting: Oversteer

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Oversteer

02.50

00:00 - Since we've just covered the module on understeer, it should come as no surprise that oversteer is simply the opposite, where the rear of the car breaks traction or starts to slide before the front of the car.
00:10 This may also be referred to as the car being loose or over rotating.
00:15 Oversteer is a situation where the car is literally oversteering or turning more than we want it to.
00:22 If we look at the racing line through a given corner, a car that is oversteering will tend to move towards the inside of the corner, driving a tighter line than what we'd intended.
00:31 Unlike understeer, oversteer requires some fundamental input from the driver in order to control the car and prevent the oversteer resulting in a loss of control or a spin.
00:42 Since oversteer requires a reaction that may not be instinctive to novice drivers, this is why most car manufacturers try to avoid oversteer as a natural handling trait.
00:52 It's important to be able to feel when the car is starting to oversteer and this feeling is transmitted into your body through the seat.
01:00 What you're going to feel is a sensation where the car turns more sharply than you'd intended from your steering input.
01:06 You'll feel the car begin to rotate around your body and through the seat you'll be able to feel the rear of the car begin to slide.
01:14 This feeling of the car rotating around you will also be coupled with a need to reduce the steering lock to maintain your desired line through the corner.
01:22 The amount of steering you need to remove will depend on the severity of the oversteer.
01:27 A small amount of oversteer will just require you to slightly reduce the steering lock to maintain your line while if it's severe enough you'll need opposite lock where we physically turn the wheel the opposite way to the direction of the corner.
01:41 If we don't get this right then we're going to end up most likely with the car spinning.
01:45 Just like in our last module on understeer, it's important to understand that oversteer can be caused by many factors, however for the purposes of this course, we'll be looking at improvements through corner weighting alone.
01:58 The first place to start then is to consider whether the car is oversteering equally in left hand and right hand corners.
02:05 If there's an imbalance here and the car is worse in one direction than the other, the first place to check would be your left weight and cross weight percentages and make adjustments as required.
02:16 If the car is oversteering the same in both directions and assuming that the left weight and cross weight percentages are close to perfect, the next aspect to consider is your rear weight percentage.
02:26 To reduce oversteer, we want to move weight towards the rear axle line which will promote more rear end grip.
02:33 This can be achieved by either increasing the ride height at the front of the car or alternatively lowering the ride height at the rear.