XRAY T3 Set-up Book - Petit RC

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TRACK-WIDTH TRACK-WIDTH - Theory Track-width is the distance between the outside edges of the wheels, front or rear, and it affects the car’s handling and steering response. It is important that front or rear track-width is adjusted symmetrically, meaning that the left and right wheels must be the same distance from the centerline of the chassis. Making the track-width narrower can be compensated with adding shims on the wheel axles to make the offset larger. front track-width REAR track-width Effects of Track-Width Adjustment Front track-width Rear track-width Wider Narrower Wider Narrower · Decreases front grip. · Increases understeer. · Slower steering response. · Use to avoid traction rolling. · Increases front grip. · Decreases understeer. · Faster steering response. · Increases rear grip at corner entry. · Increases high-speed on-throttle steering. · Use to avoid traction rolling. · Increases grip at corner exit. · Increases high-speed understeer. · Increases front grip in hairpin turns. TRACK WIDTH - MEASURING The amounts of shims used in the T3 suspension will determine the track-width settings. 1.5mm shim (left & right sides) NO shims used FRONT TRACK WIDTH 186mm 183mm REAR TRACK WIDTH 189mm 186mm TRACK WIDTH - ADJUSTING Normally you cannot adjust the track-width of a car with C-hub suspension due to the design of the suspension system. However, the T3 suspension system allows you to easily adjust the track width by adding/removing shims between the suspension holders and the bulkheads. Make sure to use the same amount and thickness of shims on both left and right sides. Increase Track-width (WIDER) Decrease Track-width (NARROWER) More/thicker shims Less/thinner shims NOTE: Changing front track-width setting will also affect the front toe and camber setting. 12
sTEERING THROW SYMMETRY Steering Throw Symmetry - Theory steering steering Although most cars‘ front suspension geometry is designed such that the turning radius of the car is the same from left to right, sometimes this isn‘t the case. You can use the toe gauge plate to make sure that the steering turns as sharply to the left as it does to the right. If it is not the case and if your radio has EPA (End Point Adjustments), adjust the EPA on your transmitter in order to achieve steering throw symmetry. The wheels should turn equally in both directions for balanced handling. For detailed information on adjusting end point adjustment, refer to the instruction manual for your transmitter. Steering Throw Symmetry - MEASURING & ADJUSTING Initial steps Prepare the car as follows: · Shocks: Attach the front and rear shocks. · Wheels: Remove the wheels. · Motor: Remove the pinion gear. · Electronics: Connect the radio electronics so the steering is active when you turn on the car Set-up components Use the following set-up components: · assembled set-up stands · toe gauge 1. Turn on the transmitter. 2. Turn on the receiver. The steering should respond to the transmitter. 3. Assemble the set-up stands. 4. Mount the set-up stands on the axles. 5. Place the car on the set-up board. 6. Set the toe gauge atop the front set-up stands. The pins at the top of the front stands fit in the machined slots in the toe gauge. 7. Push the toe gauge to the right until the pin on the top edge of the left set-up stand hits the edge of the slot in the toe gauge. Then slide the toe gauge to the left until it stops against the pin on the right front stand. 8. Adjust the transmitter steering trim until you get the same toe value on both front wheels. 9. Turn the steering to the left, and push the toe gauge against the pin on the right front stand. Note the amount that the wheel turns to the left (in degrees) on the toe gauge. 10. Turn the steering to the right, and push the toe gauge against the pin on the left front stand. Note the amount that the wheel turns to the right (in degrees) on the toe gauge. 11. Compare the amounts that the steering turns left and right. They should be the same. If they are different, adjust the left or right EPA (end point adjustment) settings on your transmitter until the left and right steering amounts are the same. 12. Turn off your receiver, then turn off your transmitter. 13
Page 2 and 3: CONTENTS Setting up the XRAY T3 3 D
Page 4 and 5: SETTING UP THE XRAY T3 107715 Ride
Page 6 and 7: Downstops Downstops - THEORY front
Page 8 and 9: RIDE HEIGHT RIDE HEIGHT - Theory ri
Page 10 and 11: DROOP DROOP - Theory Droop refers t
Page 14 and 15: CAMBER CAMBER - Theory - + camber C
Page 16 and 17: CASTER CASTER - Theory caster Caste
Page 18 and 19: TOE TOE - Theory toe in 0 toe out 0
Page 20 and 21: TWEAK TWEAK - Theory A “tweaked
Page 22 and 23: TWEAK Adjusting Tweak Using Spring
Page 24 and 25: oll center ROLL CENTER A “roll ce
Page 26 and 27: oll center adjusting front roll cen
Page 28 and 29: XRAY MULTI-FLEX TECHNOLOGY XRAY MUL
Page 30 and 31: SHOCKS Shock Absorbers Shock absorb
Page 32 and 33: SHOCKS Shock Damping Shock damping
Page 34 and 35: 34
Page 36 and 37: ANTI-ROLL BARS Anti-roll bars are u
Page 38 and 39: FRONT & REAR AXLES Solid Axles A so
Page 40 and 41: GEARING GEARING Proper gearing is o
Page 42 and 43: SHOCK BUILDING TIPS Building shocks
Page 44: The T3 Set-up Book may show previou

XRAY T3 Set-up Book - Petit RC

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