VIDEO TECH TIP
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FRONT KINGPIN OIL
VIDEO TECH TIP
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FRONT DROOP & RIDE
HEIGHT
4.0 mm
The front suspension parts were updated
to eliminate play to ensure better steering
performance. The updated holes in the
steering blocks may cause a tighter fit
of the kingpin in the steering block; it is
important that the steering block moves
freely but without excessive play. If the
kingpin does not insert into the steering
block easily, use a 4mm Arm Reamer
to enlarge the hole. Be very careful to
remove only enough material so you can
insert the kingpin without a lot of force.
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.
Makes the car more responsive and increases initial
steering. Recommended for high-traction and flat
tracks.
will make the car initially less responsive, but it will give the car more front grip,
especially in the middle of the corner. The car will be less precise and more difficult to drive, because of
increased roll. More droop is best suited for low- to medium-traction carpet, or asphalt.
will decrease roll but the car will change direction quicker. Less droop is best suited
for high-traction surfaces such as US black carpet, especially when traction rolling is an issue (and
particularly when a rear solid axle is used).
Front droop is adjusted by the preload of the front spring.
More shims between the steering block and the spring will
increase preload - and decrease droop. Removing shims will
have the opposite effect.
RIDE HEIGHT ADJUSTMENT
INITIAL SETTING
below steering block (2.0mm)
FRONT DAMPING with different oils.
Thinner oil is recommended for low-traction
tracks, while thicker oil is recommended for
high-traction tracks.
Using thicker oil on the king pin axle makes
the car less responsive but easier to drive.
Thicker oil oil also increases stability but
decreases cornering speed.
LOW traction & bumpy track
HIGH traction & smooth track
The thickness of the shims used
affects the ride height and
droop of the front suspension, so
determine the proper amount
of shims based on tire diameter
RIDE HEIGHT AND DROOP ADJUSTMENT SHIMS:
The ride height is adjusted with the supplied long shims that can
be fitted under the arms (silver/black/gold). I recommend using
as low of a ride height as you possibly can, unless you race on a
bumpy or rough surface, then the car can benefit from having a
slightly higher ride height, to increase stability, and improve the
handling over bumps.
The front axle height can be adjusted with shims under the
steering block. You can‘t change the roll center on the front end
of the X12, simply because there is no upper arm. Adding shims
under the steering block (raising the steering block) will raise the
front axle height, and at the same time, decrease bump steer.
Removing shims will lower the steering block, and increase bump
steer. For more information about Ackermann & Bumpsteer, see
PAGE 27 (servo mounting).
I recommend using the kit shimming for the front steering block -
this will be a good basic setting for most conditions.
Alexander Hagberg
(Factory driver)
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