14
1. FRONT SUSPENSION
372290
SHIM 3.2x4.8x0.5
965019
C 1.9
901304
SB M3x4
TIGHTEN GENTLY
4.9 BALL
4mm THREAD
1.5 mm
After assembling the steering block, do the following:
1. Loosen the set-screw slightly.
2. Use your thumb to press down on the top of the kingpin,
while using your other fingers to pull up the steering block.
3. Tighten the set-screw.
2x
1 -
easiest to drive
2 -
improved steering response
3 -
improved overall steering
POSITION 3.
There are THREE Ackermann positions on the steering block:
DETAIL
INITIAL SETTING
2x
3
3
3
3x6x1mm
2
1
If using less bumpsteer shims on the steering plate
and the steering linkage is touching the steering
block, use 3x6x1mm composite shim (bag 5).
FRONT COIL SPRINGS
#372176 C=1.5 GOLD OPTION
#372177 C=2.0 SILVER INCLUDED
#372178 C=2.5 BLACK OPTION
#372179 C=3.0 GREY OPTION
#372180 C=3.5 GOLD OPTION
#372181 C=4.0 SILVER OPTION
#372182 C=5.0 BLACK OPTION
#372183 C=5.5 GREY OPTION
SOFTER SPRINGS
Makes the car easier to drive over bumps and increases
steering as it makes the car roll more, especially in the
middle of a corner.
HARDER SPRINGS
Makes the car more responsive and increases initial steering.
Recommended for high-traction and flat tracks.
We use different ride heights at indoor and outdoor tracks:
·
INDOOR
: Ride height is as low as the rules allow, usually 4mm.
·
OUTDOOR
: Always run at least 5mm ride height.
Rear ride height should always be 0.1-0.2mm higher than the front.
I recommend changing droop using the upper shims on the kingpin, but note that this also changes the
ride height by the same amount. 0.5mm shim means 0.5mm less droop because the spring
gets more preload which results in a higher ride height. In that case, you should add the same amount
(0.5mm) under the lower wishbone.
DROOP SETTING
INDOOR:
I recommend using a small amount of droop for carpet tracks, somewhere between 0.5-1mm to get the
most on-power steering in combination with solid reactive steering.
OUTDOOR:
You should use more droop for asphalt tracks. At least 1mm up to 2mm. The more droop, the more
on-power rear traction you get because of weight transfer to the rear. It also helps to get a more smooth-
to-drive car at corner entry.
JAN RATHEISKY
(factory driver)
FREE MOVEMENT
2x
The number of the shims affects
the front ride height. Determine
the proper amount of shimming
based on tire diameter.
3.2x4.8x0.5mm (5x)
3.2x4.8x0.5mm (8x)
3.2x4.8x0.5mm (1x)
3.2x4.8x0.5mm (1x)
LOW traction & bumpy track:
10K cSt (#106510 HUDY)
HIGH traction & flat track:
30K cSt (#106530 HUDY)
OIL
RECOMMENDED
HUDY SILICONE OIL
DAMPING
Using thicker oil on the king pin axles makes the
car less responsive but easier to drive. Thicker oil
increases stability but decreases cornering speed.
