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1mm thickness rubber sim insertion between rear inner rubber bush and trailing arm supporting bracket was performed on VW1302 Super Beetle as mentioned before yesterday. 4 donut shape sheets were prepared, with 54-30 sized , for insertion at outer and inner portion promptly and inserted and re-tightened. It took me 3 hours for me to do that, because the long nut prepared 19mm for Hex hinge bolt loosening was not adapted, the size was adjusted into 16mm by hand grinding. The procedure was not so difficult but the time was required to make up a special tool was so, though Hex bolts on trans-axle as oil plugs were 19mm. Applied 1mm thickness rubber sim on outer and inner sides of original inner trailing arm bush has eliminated too much compliance and hysteresis phenomena as imagined. As the results, all the bad steering habit has eliminated, but stiffness of steering centric position, linearity of transition and astringency were obtained in stead. As a matter of fact, push up phenomena has increased but acceptable and hidden right side running habit came out again. Now the suspension and axle construction has become good for precise wheel alignment adjustment, I have to do that soon.
This kind of trifle experiment was so effective to change an automobile charactor into better condition, this is why I keep making efforts on the experiments onto 1/1 mechanical model like a Beetle. Now my VW1302 Super Beetle has re-acquired the ultimate performance as designed that cannot be done on another Beetle models with Swning Arm axle desig.