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DALL ARA iR01 | USER
MANUAL
ARB BL ADES
The configuration of the Anti-Roll Bar arms, or “blades”, can be changed to alter the overall stiffness of the ARB assembly. Higher
values transfer more force through the arms to the ARB itself, increasing roll stiffness in the front suspension and producing
the same effects, albeit on a smaller scale, as increasing the diameter of the sway bar. Conversely, lower values reduce the
roll stiffness of the front suspension and produce the same effects as decreasing the diameter of the sway bar. These blade
adjustments can be thought of as fine-tuning adjustments between sway bar diameter settings.
PUSHROD DELTA
Changing the Pushrod Delta results in a change in overall length of the front suspension pushrods, directly affecting the front-end
ride height. Increasing the Pushrod Delta will raise the front end and decreasing the Pushrod Delta will lower the front end. Due
to the car’s mono-shock design, this adjustment changes both front pushrods equally and prevents any crossweight changes. This
adjustment can be used to alter the ride heights without affecting the heave spring preload.
NOSE WEIGHT
The vehicle’s Nose Weight is the percentage of the vehicle’s weight on the front tires. Nose Weight represents a rough
approximation of the longitudinal Center of Gravity location in the vehicle and has a direct influence on the high-speed stability
of the vehicle. Higher Nose Weight values result in a more directionally-stable vehicle, good for low-grip tracks and situations
where the vehicle is set up with extra front downforce. Conversely, lower Nose Weight values are good for high-grip tracks and
configurations with high rear downforce levels.
SPRING PERCH OFFSET
This changes the static load of the front heave spring via an adjustable spring perch. This is used to alter the overall front end ride
height as well as the static deflection and preload in the front Heave Spring.
SPRING RATE
The Heave Spring is a spring element configured to provide resistance only in vertical suspension movement without affecting
roll stiffness. This spring element is used to control increasing aerodynamic loads and helps to maintain the proper aerodynamic
attitude around a circuit. Higher spring rates will increase the front suspension’s vertical stiffness, useful for maintaining a low
front ride height but can cause a loss of grip in the front end over bumpy surfaces. Softer spring rates will result in more front
end travel, reducing the control over the aerodynamic attitude, but will result in better front-end mechanical grip.
SPRING DEFLECTION
This displays how much the Heave Spring is compressed from its total length under static loads in the garage.
BUMP STIFFNESS
Bump stiffness affects how resistant the shock is to compression (reduction in length). This adjustments affect only vertical
(heave) movements in the suspension, and are useful in fine-tuning the aerodynamic platform around the track. Increasing
values will produce more resistance to compression (reduction in front ride height), while lower values will allow the front end to
compress more easily.
REBOUND STIFFNESS
Rebound stiffness affects how resistant the shock is to extension (increase in length). Working only in heave, increasing the front
rebound can help to control unwanted vertical oscillations in ride height. If the suspension is not allowed to work over changes in
load, such as when rebound is too high, the front tires will see a loss in grip over bumpy surfaces.
DALLARA iR01 | ADVANCED SETUP OPTIONS | CHASSIS
