Will the impact of vehicle cornering performance, such as S13 is what is more understeer than the S1

Will the impact of vehicle cornering performance of what is it? Example, S13 is more understeer than the S15 chassis structures they were Well almost. Does dip, the former beam set-up is the difference?

You can not move to correct inadequate?

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Frame, weight ratio, the number of different suspension structure K, the engine's placement location, vehicle layout, tire selection, vertical inclination angle, etc., etc. ... ... ... ... ... ...