Xray XT4 - REAR SUSPENSION ADJUSTMENTS; ECCENTRIC BUSHING ADJUSTMENTS; REAR ADJUSTMENT TABLES

15
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:
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 “R”
3x6x2mm
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
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
DETAIL
DETAIL
REAR SUSPENSION ARMS
#323112-M MEDIUM INCLUDED
#323112-H HARD OPTION
#323112-G GRAPHITE OPTION
306219
SHIM 3x6x2