recent posts

Wednesday, December 26, 2012

Rear Lower Control arms

Started on the rear lower control arms.  I made a quick jig out of 1x1.  The spacer on the outer end of the jig is 90mm to duplicate the space between the factory Miata arms.

I will be using factory Miata sized polyurethane bushing on the outside ends.  The bush tubes are 1.75" OD x 0.095" Wall.  In the jig that you will make, the bush tubes should sit flat on the work surface.

The inside ends will have threaded bungs welded in and 1/2 in rod ends will be used.  The center line of the rod ends duplicates the Haynes Roadster book.  This end of the arm is spaced 9.5mm (3/8in) off the work surface.
Check out

TIP:  On the leg where the cross tube connects at the outer side of the arm, weld the bush tube last or you will never get the cross tube in.  Ask me how I figured that out.