Optima Mid Runner (Almost Done, New Arms installed)

[bigjeepzz]

Big progress last week. I finally was able to machine the arms and get the remainder of the parts in to finish the build. I wanted to run the newer ZX5 wheels so i had to make a couple adjustments to the drawings on the arms. I ended up machining the front arms 1/4 wider then the factory ZXR arms, which made up the difference in the different wheel offset. I also ended up running 73mm swing shafts in the front and 62.5mm swing shafdts in the rear.

The factory Kyosho steering was cracked so I needed to figure out a way to make the car steer. After looking at the RC10 Worlds car steering I had at the house, I went ahead and machined new posts so i could have the ball bearing steering in this car. Works great but I am not getting full lock on the outside tire when turning. I may need to find some different bellcranks.

I fired the car up today and it runs really well. The B4 slipper works flawless and I am surprised how quiet this car runs. I need to take the car aprt and clean everything for the final assembly. There are a handful of things I am going to replace but nothing major. Will run the car with a boosted 13.5. If it doesn;t run like I want, I have an 8.5 which should be more than enough especially on the track I run on. Hopefully I can get to the track this week for some tuning. I may be able to get some video as well.

Parts Used:
ZX5 Wheels Front and Rear
ZX5 Rear Hubs
ZX5 Front steering arms and Castor Blocks
73mm Swing Shaft (Front)
62.5mm Swing Shafts (Rear)
RC10 Worlds ball Bearing Bell Cranks
Machined LIPO Cradles
Machined Arms
Machined Top Brace
LWB Chassis
SDPSI Belt
Repro Body and Undertray
Jake