Wednesday 7 May 2014

16. Improve the lower front wishbone

As I have decided to buy new upper front wishbones from Spydercars I thought about buying the lower ones as well.
But why buying new ones, when the improvement of the existing ones is such a funny welding job -
I like it to weld on 2.5mm thick, clean steal !

Before starting this welding job, I have to think about what to do.
Fix one end of the wishbone frame mounting point in the vice and push and pull the other end. This will give a feeling how easy it is to bend the - still - original one.
So, first I do all the steps on wishbone and compare it to the original one - in advance, it was a real improvement !

Welding at the inner bushing of the wishbone.

Welding the inner brace and the rivets - what a bad material for welding.
Welding the outer brace all around.
Support the bushing and stiffen up the end of the arm.

There was a real improvement, which means less flex in the bushings, but the diagonal stiffness could be better.
Add a U-profil to the inner brace and weld it all around
For the outer brace I made two different solutions:

The first one was a U-profil which was a little bit too huge. I would have increased the stiffness but it look much too heavy and it was hard to create. From the form it was optimized for hard soldering to the arms.



This solution with a square tube has to be enough. Less work...












The finished improvement of the lower wishbone. In the middle you see a brace plate to support the U shaped arms. I didn´t want to close the arms complete cause of the rust protection.

The test in the vice gives a very good feedback. You do not have enough force to bend the wishbone for milimeters - bending the original one for a cemtimeter was not a problem.


The "only" issue, that could arise is, that the wishbone will break or crack.
No risk, no fun....

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