It's related to the need to keep the inside driving wheel loaded in order to maximise traction when exiting corners. Whether it's the inside front wheel or the inside rear wheel that is prone to lifting depends on whether the car has more roll stiffness at the front or at the rear, and this is typically directly related to whether the car is FWD or RWD.
Competition FWD cars need to keep the inside front wheel loaded in order to maximise traction exiting corners, so will typically have a higher rear roll stiffness than front roll stiffness (stiffer rear anti roll bar / and or springs). This results in greater % of the total lateral weight transfer occuring at the rear end of the car and less at the front.
RWD cars typically do the opposite, i.e. have higher front roll stiffness in order to unload the inside front more than the inside rear in order to keep the inside rear more heavily loaded exiting corners. Even single seaters do this, but it's harder to see because the inside front wheel rarely actualy lifts, but does become very 'light' relative to the inside rear.
Note that in absolute terms a FWD car may have stiffer springs / ARB in the front than the rear but still have a higher rear roll stiffness because the relative roll stiffness is laregly dependant on the weight being carried on each axle line, with more front / less rear weight with FWD cars. So, even with a stiffer front spring and ARB (relative to rear), a front heavy car may still have a higher rear roll stiffness and tend to lift the IR when cornering hard.
Also note that relative front / rear roll stiffness has implications for understeer / oversteer, with higher rear roll stiffness being one of the factors generating less understeer / greater oversteer, and higher front roll stiffness tending to generate greater understeer.
You don't want to be lifting the inside rear wheel off the ground too much - doing so is an indication that you have achieved full weight transfer at the rear and any further lateral load transfer happens at the front.
One of the most important things we used to look at while racing with regards to lifting an inside wheel was the path in which the wheel takes. Ideally it will be a large smooth curve, you dont want to 'pop' up the wheel and 'slam' it back down, you want it to be a soft take-off and slowly lowered back onto the ground...
One of the most important things we used to look at while racing with regards to lifting an inside wheel was the path in which the wheel takes. Ideally it will be a large smooth curve, you dont want to 'pop' up the wheel and 'slam' it back down, you want it to be a soft take-off and slowly lowered back onto the ground...
well that smooth lift is a direct result of smooth cornering, which should be aimed at weather or not there is a lifted wheel.
Drive ur car up a driveway with aftermarket shocks or coilovers lol. I think this is the 3 wheeling ur thinking of
hay wasnt there a tread on this before with pics of peoples car in the drive ways with three wheels can anyone find that thread iam interested in that lol
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Originally Posted by geeang
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