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Swiss two-become-one 240Z Ground up restauration / JDM mods

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On 4.2.2018 at 4:36 PM, z240 said:

How great to have that resource to make those bushings. Great work!  Can you tell us if he is casting them or machining them from a larger piece?

 

BTW,  the ES poly bushings fit the 73 and later crossmember (Item 24 in the diagram) with the horizontal mounting bolts.

Absolutely :) They are cast items

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Time for a little more knowledge today :) After i posted pictures from my T/C rod bushings in various forum-threads, people replied that i should swap to rubber in the back. After discussing a few topics i figoured out that original rubber bushings are still available new from Nissan and ordered a set, which i was able to pick up today:
P1190618-Kopie.jpg

 

The problem: According to many people, the T/C rod tends to brake at the yellow area, when PU-bushings are used both in front and rear of the Frame-rail mount. This due to much counterstrength whith the hard PU-bushings.
P1190619-Kopie.jpg

 

For sciences' sake i decided to compare both setups with an original NOS 240Z frame rail i have in my shop.
Top: Front PU / rear Rubber
Bottom: Front PU / rear PU
P1190621-Kopie.jpg

 

1st: Both PU. Fits perfect, but it's very stiff, both compression and angle-movement wise.
P1190622-Kopie.jpg

 

Second: Front PU / rear rubber.
You still have the advantage of PU-front (less rearwards movement during compression, red arrow), while having more freedom of angle-movement (yellow arrow) and therefore minimized the chance that the T/C rod will brake.
P1190627-Kopie.jpg
 

So thanks all for the inputs and advice and i'll definitely stick with the PU / Rubber combination for best performance and with least failure rate :)

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