XRA360006 XRAY XB4 2019 Manual

13
TOE-IN
ANTI-SQUAT
ROLL CENTER
TRACK-WIDTH
3. REAR SUSPENSION
ECCENTRIC BUSHINGS HAVE TWO DIFFERENT OFFSETS FROM THE CENTER.
Middle position = 0.5° or 0.375mm from center.
Outer position = 1° or 0.75mm from center.
The XRAY rear alu lower suspension holders provide great range of adjustment for the rear suspension. Using different combinations of eccentric bushings, fine adjustment of rear anti-squat, rear toe-in, rear
roll center, and rear track-width can be obtained. For more information about the influence of rear anti-squat, rear toe-in, rear roll center and rear track width on car handling, please refer to HUDY Set-up Book
(#209100).
The tables describe the amounts of adjustment using the center and outside positions of
the eccentric bushings.
The middle position eccentric bushings allow for finer adjustment increments.
Example:
The track-width is directly influenced by the size of
the wheels and tires used.
0(RR) - 0 (RF) = 2°
0(RR) - 0.5 (RF) = 2.5°
0(RR) - 1 (RF) = 3°
ANTI-SQUAT ROLL CENTER TRACK-WIDTH TOE-IN
RR RR RR RRRF RF
RF
RF(°) (mm) (mm) (°)
=2°
=3°
=1°
=3°
=2°
=4°
=1°
=2°
=0°
= 2°
= 2.5°
= 3°
=3°
=4°
=2°
=2°
=3°
=1°
=4°
=5°
=3°
=
+
1.5mm
= 0mm
=
-
1.5mm
=
+
0.75mm
= 0mm
=
-
0.75mm
➊
Check for free movement
Marked “L”
Marked “R”
3x6.5x2mm
from rear arm
ARMARM
Arm Reamer 3.0mm (HUDY #107633)
If the suspension arm does not move freely use a
HUDY Arm Reamer to size the holes of the arms
SUSPENSION ARM REAR LOWER
#363112-H RIGHT HARD INCLUDED
#363122-H LEFT HARD INCLUDED
#363112-G RIGHT GRAPHITE OPTION
#363122-G LEFT GRAPHITE OPTION
➊
➋
➌
➌
➍
➍
RR
RF
All possible mounting
alternatives of eccentric bushings
Composite eccentric bushings
INITIAL POSITION
1º 1º0.5º 0.5º0º
Composite eccentric bushings
INITIAL POSITION
1º 1º0.5º 0.5º0º
903312
SFH M3x12
REAR BLOCK
IMPORTANT
From Rear Arm
SHIM 3x6.5x2
DETAIL
DETAIL