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IMHO...
heavy cars need PSteering... or little or no caster = little or nil straight line stability. Virtually all front drive cars need PSteering to mask torque steer.
PSteering masks "feel". GM sedans & Japanese cars in NAmer are typically over boosted and generally feel "light", ie easy to steer, but have virtually no feel. As a driver it's like driving a video game, you as the driver ends up driving to optimize the PSteering vs optimizing the traction.
The ultimate case of driving to maximize the driver aids was my experience driving a BMW X5 on track and finding that traction control, anti-skid & stuff intruded so heavily on the what the driver did that it was nearly impossible to do anything "stupid". The systems would always override the driver's "stupid" inputs. Thus to maximize performance and to get lap times down I had to drive to minimize the intrusion of the "driver aids", in order to allow them to maximize traction. Instead of driving the four tire patches I was driving a video game!
Light car without PSteering = GRINS!!!
Kiyoshi
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