Xray T1 EVO2, Set-Up Book

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C CH HE EC CK KIIN NG G F FO OR R S SU US SP PE EN NS SIIO ON N T TW WE EA AK K
A "tweaked" car is an unbalanced car, and has a tendency to pull to one side
under acceleration or braking. Tweak is caused by an uneven wheel-load on
one particular axle. Now that the suspension geometry set-up has been
completed, you must check for suspension tweak before you reconnect the
anti-roll bars (optional).
Perform these initial steps:
1. Place the car on a flat reference surface.
2. Make sure that both front and rear anti-roll bars are disconnected.
C Ch he ecck kiin ng g ffo orr ttw we ea ak k ffrro om m tth he e ffrro on ntt o off tth he e cca arr::
Lift and drop the front end of the car a few centimeters to let the suspension
settle. Place a sharp tool underneath the chassis at its middle point, and lift
the front end.
If one front wheel lifts before the other, the rear of the car is tweaked. Adjust
the preload on the rear springs until both front wheels lift at the same time.
If, for example, the front right wheel
lifts earlier, you must increase the
preload on the rear left spring, and
decrease the preload on the rear
right spring.
You must adjust both rear springs,
otherwise you will change the driving
camber!
Reconnect the rear anti-roll bar, and
check for tweak again by lifting the
front end of the car. If again one
front wheel lifts before the other, the
rear anti-roll bar may be tweaked.
Check the anti-roll bar with both
shocks disconnected from the arms
and with the chassis suspended on
blocks. Make sure that the downstop
adjustments are set equally. Then
adjust the length of one or both rear
anti-roll bar push rods until both
front wheels lift at the same time.
There might happen that the wire is
tweaked and therefore the
suspension with connected anti-roll bars is tweaked as well. Carefully
straighten the wire, and then check for tweak again. Both wheels must start
lifting up at the same time.
C Ch he ecck kiin ng g ffo orr ttw we ea ak k ffrro om m tth he e rre ea arr o off tth he e cca arr::
Lift and drop the rear end of the car a few centimeters to let the suspension
settle. Place a sharp tool underneath the chassis at its middle point, and lift
the rear end. If one rear wheel lifts before the other, the front of the car is
tweaked.
Adjust the preload on the front
springs until both rear wheels lift at
the same time.
If, for example, the rear right wheel
lifts earlier, you must increase the
preload on the front left spring, and
decrease the preload on the front
right spring.
You must adjust both front springs,
otherwise you will change the driving
camber!
Reconnect the front anti-roll bar, and
check for tweak again by lifting the
rear end of the car. If one rear wheel
still lifts before the other, the front anti-
roll bar is tweaked. Loosen the screw
on the left front anti-roll bar mount.
Adjust the eccentric cam until both
rear wheels lift from the ground at the
same time. Tighten the screw to secure
the adjusting cam.
Chassis Set-up Chassis Set-up
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