Xray XB8R Instruction Manual - page 43
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DIFFERENTIALS
Adjust the characteristics of the differentials by using thinner or thicker silicone oil.
Differential
Oil thickness
Characteristics
Front
Thinner
· increases steering into corners (off-power)
· if oil is too thin the steering may become inconsistent,
especially it can lose forward traction
(and steering) during acceleration out of corners
Thicker
· increases stability into corners during braking
· increases steering on-power at corner exit
Center
Thinner
· front wheels unload more during acceleration
· decreases on-power steering (reduces oversteer)
· easier to drive on rough tracks
· if a high-power engine is used you could waste too much
power and sometime “cook” the oil in the center differential
because it “overloads”
Thicker
· more all-wheel drive effect
· better acceleration
· increases on-power steering (reduces understeer)
· better suited on high-bite, smooth tracks
· car can be more nervous to drive especially if a high power
engine is used - you might need to be smooth on the throttle
Rear
Thinner
· increases cornering traction
· increases steering into corner
Thicker
· decreases rear traction while cornering
· reduces wheelspin
Wing position/angle
Characteristics
Higher
· increases stability at higher speeds
Lower
· increases stability at lower speeds
Forward
· decreases rear traction
Rearward
· increases rear traction
Flatter angle
· level jumping or nose-diving
Steeper angle
· increases traction at higher speeds
· less nose-diving
CLUTCH
You can adjust the engagement characteristics of the clutch by changing the clutch
springs or changing the orientation of the clutch shoes.
Clutch Springs
Adjust the engagement characteristics of the clutch by using different clutch springs.
Clutch springs
Characteristics
Thinner (0.9mm)
· clutch engages earlier at lower RPM
· more gradual acceleration
· easier to drive but not as aggressive
Thicker (1.0mm)
· clutch engages later at higher RPM
· more sudden acceleration
· car is more aggressive
Clutch Shoe Orientation
Adjust the engagement characteristics of the clutch by changing the orientation of the clutch shoes.
Clutch shoe orientation
Characteristics
Trailing shoes
· clutch engages more smoothly
· more ideal for slick track conditions
Leading shoes
· clutch engages more aggressively
· more ideal on high-traction tracks
REAR WING
Adjust the position and angle of the rear wing using the different mounting
position of the wing supports.
Trailing shoes
Leading shoes
Silicone Diff Oil
XB8R SET-UP
IMPORTANT!
Make equal adjustments on both left and
right sides of the rear wing.
Changing the oil in the front differential affects overall steering response.
Changing the oil in the center differential affects the front-to-rear drive.
Changing the oil in the rear differential affects cornering traction and overall steering.
Part number
Viscosity
359601
“1 0000”
359602
“2 0000”
359603
“3 0000”
359605
“5 0000”
359607
“7 0000”
359610
“10 000”
359620
“20 000”
359630
“30 000”
359660
“60 000”
Use only the genuine premium quality
Xray silicone diff oils. The differential
oils are availabe in 50ml size in these
viscosities: