G37 Track Set Up. Oversteer Help.

OptionZero

This is like wanting to lose weight and not wanting to diet and exercise because you’ll get sweaty

Your alignment works together with your springs and dampers to make sure your tires have grip; your problem is suddenly losing grip

And stiffer front bar usually leads to more relative understeer but all track people agree the front needs more stiffness to ADD grip on front

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2.2Lude

Thanks for bringing that up. This is something that was always a bit hard for me to understand when I was originally doing research last year on how to get a base set up in place for my car. Admittedly, I kinda just went with it thinking it'll work out without fully understanding it.
I read a lot on this site from members like yourself and others that have provided input.

Maybe you can help me wrap my head around the concept better.
Traditionally a stiffer front bar will INCREASE understeer by REDUCING GRIP correct?

So how does a stiffer front bar both INCREASE understeer and INCREASE/ADD grip?

Or is it just something that comes into play with a square tire set up to improve the front grip with wider tires but use a stiffer bar to increase understeer and balance the cars front/rear traction?

cv129

My thoughts:

The bar restricts the amount of weight being transferred from one to the other side of the car. The weight transfer can both increase and decrease grip.

Front wheels - At any combination and speed and steering angle…too little weight transfer means you won’t get the maximum grip the outer tire provides, because there isn’t enough weight pushing down on the tire. Therefore the general saying of “stiff front bar = under steer”. Then at the other extreme….disconnect the front bar, let all the weight freely transfer side to side. In the same cornering scenario, most likely, it’ll give you a split second of strong directional change response. However, while downward force in the tire is good, the added momentum is the negative byproduct. Without the front bar, your outer front tire is left to fight all the momentum, and quickly others overwhelmed.

So the relationship between bar stiffness and over/understeer isn’t a single direction curve. I would imagine it to be more convex, and certainly chassis dependent.

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