dallara F305 - Setup Adjustment; Suspension Geometry Adjustments; Spring and Roll Centre Settings; Anti-Roll Bar Adjustments

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 (mm) mono 4.37 twin 4.34 6.09
1TURN
Camber change (deg) 1’ 12’
Thread step 20/”R+24/”L=2.32mm 20/”R+24/''L=2.32mm
TOE ADJUSTER (PER WHEEL) Height change -3.2mm
Camber change -19’
1TURN toe change (deg) 37’ -45’
thread step 24/”=1.06mm 20/”R+24/”L=2.32mm
CAMBER SPACER +1mm
height change
toe change
17’
0.4mm
22’
1.8mm
11’=1/4Turn
CASTOR ADJUSTER 23° brake calliper=16°
Castor change (deg)
29’ -36’
thread step 24/''=1.06mm 24/''=1.06mm
1TURN
height change (mm) mono -1.18 twin -
1.31
-0.4mm
camber change (deg) -5' 3'
toe change (deg) 0 -2'
SPRING PLATFORM
+1TURN
thread step (mm) 2 2
height change (mm) mono 1.85 twin 2.25 2.47
WHEEL/SPRING RATIO (vertical) mono: 0.924 twin:
1.123
1.234
ARB WHEEL/BELLEVILLE RATIO (MONO)
1.590 --
ARB WHEEL/DROP LINK RATIO (TWIN)
T-bar 221mm: 1.063
T-bar 170mm: 1.116
5 positions blade:
1 (soft): 1.118
2: 1.134
3: 1.150
4: 1.167
5 (stiff): 1.184
2.083
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 typical wheel travel.
• Page 38 gives further information regarding the twin-damper system.