Saturday, May 10, 2014

Lunch Box Build Update 10 - front suspension upgrades

Lunch Money now has a 'proper' suspension up front, with the conversion using the CRP FX10 setup. This upgrade is very helpful as the suspension now maintains the same camber throughout the range of the motion. Here's the suspension uncompressed :

And compressed:

Kinda hard to see, but note how the angle of the tires relative to the ground is constant. (Above)

Here's a close-up of the right arm, showing the Arrma turnbuckle, Tamiya Mini CVA oil-filled shock, and the CRP arm and knuckle. 


And here's the left side, slightly compressed. 

The bolt seen on the top of the steering knuckle is a M3x20, which I did not have, and was lucky to find at Lowes. 

Heres how I mounted the inner pillow ball for the control turnbuckle:
Basically drilled into the front chassis piece, secured with a locknut and medium thread lock. 

I did have to modify the arm where the hinge pin slides through. This is because the shock would hit the steering rod, preventing full articulation. I cut about 1/4" off one side and flipped it over to the other, basically using the piece as a spacer. 

The "spacer" is on the right (to the rear) of the shock. You can see the mark used to make the cut near the front. The brass spacing sleeve fits perfectly in there. 

This mod was pretty easy to do, once I had the right pieces-parts. I used the shock 'pogo springs' from the original kits "shocks" on the front which are a really good match, providing a plush, but not soft, ride. All in all I'm very happy with this hop up, and since it is from a pre-Lunch Box model (the FX10), I feel it keeps with the theme of a 'retro' build. 








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