OFNA Racing Jammin SCRT Nitro RTR - Manual (Page 36)

SETTING GUIDE
Adjust the front caster angle by changing the arm block "A" or "B" on the front lower arms.
After you set the caster angle , you will also need to adjust the front upper arm position.
The final caster also depends on the kick-up setting.
Example:16 degree caster on C-hub + 7degree kick-up+"A" lower arm block =22 degree final caster.
16 degree caster on C-hub + 7degree kick-up+"B" lower arm block =23 degree final caster.
Caster angle Characteristics
Decreases off-power steering into a corner.
Increases on-power steering out of and in a corner.
Increases straight-line stability.
CASTER ANGLE
B
B
REAR WHEELBASE
Adjust the wheelbase by using the spacers on either side of the rear wheel hub (at the bottom pin).
less spacers in front of the rear wheel hub.
- increases rearward weight transfer during acceleration.
- increases on-power traction.
- quicker off-power steering into corners.
- slight tendency to push on-power at corner exit.
- increases steering response.
- better on tighter, more technical tracks.
more spacers in front of the rear wheel hub.
- decreases off-power steering into sharp corners.
- increases stability.
- slower initial steering reaction (off-power).
- improves on-power steering at corner exit.
- better handling over bumps and ruts.
- better on more open tracks with high-speed corners.
IMPORTANT! Make equal adjustments on both left and right sides of the car.
Shorter wheelbase
Longer wheelbase
Increases off-power steering into a corner.
Decreases on-power steering out of and in a corner.
Decreases straight-line stability.
Less caster
More caster
•Different shock positions will result in firmer or softer response of the
suspension system.
•Install the shock in an inward angle will cause softer rebound. Softer or firmer
suspension system will lead to different steering response.
•Adjust the shock angle positions according to track conditions.
FRONT SHOCK ANGLE SETTING
Firm front suspension, less steering.
Soft front suspension, more steering.
1 2 3
Soft Firm
1 2
Soft Firm
REAR SHOCK ANGLE SETTING
1 2
Firm rear suspension, over steering.
Soft rear suspension, under steering.
Soft
Soft
Firm
Firm
1 2 3
0
324mm 321mm
A
A
7 degree
16 degree
on C hub
FRONT CAMBER ANGLE SETTING REAR CAMBER ANGLE SETTING
•Place the model car on flat surface. Raise the chassis to its maximum clearance
before the wheels leave the ground.
•Adjust the length of the front and rear upper arms so that the wheels are vertical to the
ground.
•Adjust the camber angle by turning the turnbuckle rod on the upper arms clockwise or counter-clockwise.
(We suggest to use zero degree for the front and negative -1.5 degree for the rear.)
- +
Turnbuckle
- +
Negative Positive
- +
Turnbuckle
- +
Negative Positive
FRONT TOE-IN AND TOE-OUT SETTING
•Making the tie rod shorter will make front
tires toed out.
•Response will be quicker and may under steer.
•Adjust the length of front steering rod to
change the toe angle.
•Making the tie rod longer will make front
tires toed in.
•Response will be slower and may over steer.
TOE-IN
NEUTRAL POSITION
Steering Rod
TOE-OUT TOE-OUT