Xray XT8, Instruction Manual

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ANTI-ROLL BARS
Adjust the stiffness of the front or rear anti-roll bar by using a thinner or thicker wire.
Anti-roll bar stiffness Front/Rear Characteristics
Softer = thinner wire Front · increases front chassis roll
· increases front traction
· decreases rear traction
· increases off-power steering (may cause oversteer)
Rear · increases rear chassis roll
· increases rear traction
· decreases front traction
· decreases on-power steering (increases understeer)
Stiffer = thicker wire Front · decreases front chassis roll
· decreases front traction
· decreases off-power steering at corner entry (increases understeer)
· quicker steering response
Rear · decreases rear chassis roll
· decreases rear traction
· increases front traction
· increases on-power steering (may cause oversteer)
· quicker steering response in high speed chicanes
Rear anti-squat angle Characteristics
Less anti-squat =
flatter arm
· increases rear traction off-power
· decreases rear traction on-power
· better on a bumpy track
More anti-squat =
leaning more backwards
· increases rear traction during acceleration
· decreases rear traction off-power
· better on smooth and/or slippery tracks
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WHEELBASE
Adjust the wheelbase by using the spacers on either side of the rear uprights (at the bottom pin).
IMPORTANT!
Make equal adjustments on both left and right sides of the car.
Wheelbase Characteristics
Shorter wheelbase =
less spacers in front of
rear upright
· increases rearward weight transfer during acceleration
· increases on-power traction
· quicker off-power steering into corners
· slight tendency to push on-power at corner exit
· increases steering response
· better on tighter, more technical tracks
Longer wheelbase =
more spacers in front
of rear upright
· decreases off-power steering into sharp corners
· increases stability
· slower initial steering reaction (off-power)
· improves on-power steering at corner exit
· better handling over bumps and ruts
· better on more open tracks with high-speed corners
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REAR ANTI-SQUAT
REAR ANTI-SQUAT: STANDARD PARTS
Using standard parts included in the XT8 kit, you can easily adjust the rear anti-squat by changing
the lower plate at the FRONT of the rear bulkhead. You can use either the 1° or 2° plate.
R
1
R
2
= 1° = 2°
XT8 SET-UP
4
3
2
363mm 365.5mm 368mm
REAR ANTI-SQUAT: I.S.S. (optional)
Using the following optional I.S.S. parts, you can easily adjust rear anti-squat to 2~4°:
#353312 Front plate 2-4° anti-squat, #353323 Rear plate 2-4° toe-in,
#352315 Eccentric
inserts, #357212 Inner pins.
The bushings in the FRONT plate control the rear anti-squat angle.
(The bushings in the REAR plate control the rear toe-in angle.)
IMPORTANT!
You cannot combine composite plates (std) and I.S.S. plates (with eccentric bushings). Also, you
must use the appropriate inner pivot pins (shorter) with I.S.S. components.
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