User Manual

15
Tuning, Adjusting and Maintaining the Speed-NT
Periodically examine your Speed-NT for the following:
• Keepyourvehiclecleanusingabrushtoremovedirt
and dust.
• Lookforcracksinthesuspensionarmsandother
molded parts.
• Checkthatthetiresarestillgluedtothewheels.
• Checkthatallthewheelbearingsarecleanandlubricated.
• Usingyourtools,attempttotightenallthescrewsand
nuts.
• VerifythattheChamberLinksandSteeringlinkageare
not bent.
• CheckthattheToeandChambersettingsareasdesired
and equal.
• ChecktheDrivetrain:
o Check the Spur gear for wear.
o Check the Pinion gear.
o Check the Slipper Pads for wear.
• Taketheshocksothevehicleandcheck,especiallyifthey
appear to be leaking as it is time to rebuild them.
• Lookoverallthewiringandconnectionsforbarewireor
any place which could lead to a short circuit.
• TurnontheradioandiftheGreenLEDisoordimreplace
the 4 AA batteries in the transmitter.
After you become familiar with driving your Speed-NT,
you may need to reset or make adjustments for better
driving performance.
Just as in a real car, alignment is an important factor in your
vehicle’s handling. When you are ready to make adjustments
it is a good idea to have a at work space to place your vehicle
on. This will enable you to easily and more quickly make both
Toe-in and Chamber adjustments. These adjustments should be
set with the vehicle sitting at its normal ride height.
Starting Settings
Carburetor:
High-Speed: 2
3
/
4
Turns Out
Low-Speed: 2
3
/
4
Turns Out
Slipper: 4 Turns Out
Radio End Points:
Tuning the Front End of the Speed-NT
Shock Location: The Speed-NT has two mounting locations
on the front shock tower. The position can be easily adjusted
by simply moving the top of the shock to another hole. The
standard location (outside hole on the tower) works best on
most surfaces. Moving the top of the shock inward a hole will
slow steering response and make the Speed-NT smoother in
bumps. The standard position on the arm is outside, which
oers the best balance. Running the inside shock location will
give the Speed-NT more steering into the turn and less steering
on corner exit. Running the shock location outside on the
front arm will give you less overall steering into the turn and
keep the front end atter through the turn, making the Speed-
NT smoother and easier to drive. This can be used on high-
tractionsurfaces.Keepinmindasyoumovetheshocksinon
the arm this will require internal limiters to obtain the correct
suspension travel. For the inside location a total of .200-inch
limiter works great. Losi sells a shock spacer set (LOSA5050) that
includes .030-inch, .060-inch, .090-inch and .120-inch spacers.
All of the Camber and Steering Linkages have been assembled
in the following way.
Using the supplied at metal turnbuckle wrench if you need to
SHORTEN any link on the Speed-NT rotate the wrench towards
the front of the vehicle (counterclockwise). If you need to
LENGTHEN any link then rotate the wrench towards the rear of
the vehicle (clockwise).
Static Camber: This refers to the angle of the wheels/tires
relative to the surface (viewed from either the front or back).
Negative camber means that the top of the tire leans in toward
the chassis. Positive camber means the top of the tire leans out,
away from the chassis. Camber can be precisely measured with
after-market camber gauges, sold at a local hobby shop. It can
be measured (roughly) using any square (to the ground) object
by checking the gap between the square edge and the top of
the tire. Testing has shown that 1 degree of negative camber
is best for most track conditions. Increasing negative camber
(in the range of 1-2 degrees) will generally increase steering.
Decreasing negative camber (in the range of 0-1 degree) will
generally decrease steering and the Speed-NT will feel easier to
drive as a result. This is, most often, a very critical adjustment in
tuning your Speed-NT that can be made quickly and easily.