21
:: Tuning Tips
Ackermann:
Ackermann is the angle difference between the front wheels when they are turned to steer the car. For minimal tire
slip, it is standard for the inside wheel to steer to a greater angle than the outside wheel. The SC5M allows ackermann
adjustments by changing the washer thickness used behind the steering rack ballstuds. The kit setup uses 2mm
washers and is most common for racing conditions. If corner entry steering is too aggressive, try increasing the
ackermann by removing shims from behind the steering rack ballstuds. Increasing the ackermann will increase the
angle difference of the front wheels when steered, resulting in a more stable car on corner entry.
Anti-Roll Bars:
The optional #91535 rear anti-roll bar kit (also called the “swaybar”) allows you to add roll resistance to the rear end
with minimal effect on handling over bumps and jumps. It is an especially helpful tuning item on high-grip tracks
(try the gold bar). The silver and black anti-roll bars are typically used on medium-grip loose tracks.
Trailing Axle:
Trailing axle is the distance from the king pin to the axle that “trails” behind the pin. The SC5M includes inserts to allow
adjustments for trailing axle to three positions: 4mm (standard), 3mm, and 2mm. The standard setup uses 4mm
trailing axle for the most stable handling. For more corner entry steering, try the 3mm trailing axle option.
It is important to adjust the ackermann and wheelbase settings to match the trailing axle adjustment. Refer to the
chart below for some common settings:
Trailing Axle
Position
4mm
1mm
2mm
3mm
2mm
2mm
3mm
1mm
0mm
0mm
1mm (middle)
N/A
0mm (back)
1mm
2mm (forward)
# of Shims
on Rack for
Less Ackermann
# of Shims
on Rack for
Std. Ackermann
# of Shims
on Rack for
More Ackermann
Rear Caster Block
Wheelbase Shim
Summary of Contents for RC10SC5M
Page 1: ......
