dallara F303 - Page 6

SETUP ADJUSTMENT 6
Effects of the adjustments on the cars’ set-up.
Positive change in: means:
Height car rises
Toe toe-out
Camber upper part of rim outward
Castor lower part of rim points ahead
FRONT REAR
PUSHROD ADJUSTER
Height change
4.275mm 6.97mm
1TURN
Camber change (deg) 2’ 14’
Thread step 20/”R+24/”L=2.32mm 20/”R+24/''L=2.32mm
TOE ADJUSTER (PER
WHEEL)
Height change -0.7mm
Camber change -13’
1TURN toe change (deg) 36’ -45’
thread step 24/”=1.06mm 20/”R+24/”L=2.32mm
CAMBER SPACER +1mm
toe
variation
16’ 16’
11’=1/4Turn
CASTOR ADJUSTER 20° brake calliper=14.5°
Castor change (deg)
25’ -35’
thread step 24/''=1.06mm 24/''=1.06mm
1TURN
height change (mm) -0.14mm -0.8mm
camber change (deg) -6' 1'
toe change (deg) -2' 3'
SPRING PLATFORM
+1TURN
thread step (mm) 2 2
height change (mm) 1.79 2.47
WHEEL/SPRING RATIO (vertical) Mono: 0.896/Twin: 1.174 Std: 1.237/Narrow: 1.193
ARB WHEEL/BELLEVILLE RATIO
(MONO)
1.548 --
ARB WHEEL/DROP LINK RATIO (TWIN)
T-bar:1.14
Mono blade: 0.21
Std: 1.808
Narrow: 1.727
ROLL CENTRE HEIGHT
Tyre dependent Tyre dependent
• Spacers to adjust camber are available in the following thickness: FRONT: 1.0, 1.5 and 2.0 mm.
REAR: 0.8, 1.0, 1.2, 1.5 and 2.0mm. Combine these to make fine adjustments.
• Front and rear wheel to spring, front wheel to Belleville and rear wheel to drop link motion ratios
may be considered as constant for all the wheel motion.
• Page 38 gives further information regarding the twin-damper system.