Originally Posted by Burlap
More of a general Tamiya setup question (this thread is far more active than the 415 one), but what's the different between running the ball connector on the outside hole of the rear upright compared to the inner hole?
Currently I have my Tamiya setup with the ball connector on the inside hole, but notice that the 417 in kit setup and a lot of the setups posted in this thread use the outside hole.
Well moving to the inner or outer ball connectors on your bulkheads / rear hubs changes your camber link length.
In general having a short camber link increases the camber gain that the wheel/tyre moves through as the suspension compresses. This gives better rotation entering a turn and more traction coming out of the turn.
Think of it as when entering the corner how the cars weight transfers and the suspension compresses in a corner, the increased camber angle of the tire will increase the camber on the heavily loaded outside tyre (providing lateral thrust). The tyre will have less rubber on the road and more cornering capacity when you add camber gain.
Conversely a longer camber link using the outer hole on the hub / inner hole on the bulkhead will decrease camber gain, which can make the car feel lazy and less reactive, giving the car a more stable feel. This is usually a good way to stop traction rolling, or to calm a car down.
Obviously there are lots of other things that can effect the cornering of the car such as Tyres, Springs and oil primarily.
But to sum it up briefly
Short camber link gives more positive camber gain, giving more turn in and rotation, and good traction out of a corner, although the car can feel very twitchy
Long camber links give little to negative camber gain making the car feel a bit more stable but less reactive in corners