SLASH 4x4 • 27
ADVANCED TUNING ADJUSTMENTS
GEARING
One of the more significant advantages to your model’s transmission
is the extremely wide range of available gear ratios. Changing the
gearing allows you to fine tune the speed of the model and control
the temperatures of the battery pack and motor. Use a lower gear ratio
(numerically larger) to reduce current draw and temperatures. Use a
higher gear (numerically lower) to increase top speed. Use the following
formula to calculate the overall ratio for combinations not listed on the
gear chart:
When using higher gear ratios, it is important to monitor the
temperatures of the battery and motor. If the battery is extremely
hot (150°F) and/or the motor is too hot to touch (200°F), your
model is probably over-geared and drawing too much current. This
temperature test assumes that the model is close to factory stock
weight and operates freely with no excessive friction, dragging, or
binding, and the battery is fully charged and in good condition.
Note
:
Check and adjust gear mesh if a spur and/or pinion gear is changed.
This model is equipped with a Velineon 3500 motor. The gear
combination that comes stock on each model provides good overall
acceleration and top speed. If you want more top speed, install the
included optional large pinion gear (more teeth).
The included
optional large pinion gear is intended for high-speed running on
hard surfaces, and this gearing is not recommended for off-road or
repetitive starting and stopping.
LIPO BATTERIES
LiPo batteries are intended only for the most advanced users that are
educated on the risks associated with LiPo battery use. It is critical to
follow all instructions supplied by the battery manufacturer and the
charger manufacturer for proper charging, use, and storage of LiPo
batteries. Make sure you understand how to use your LiPo batteries.
See Safety Precautions and warnings on page 4 for more information.
TEMPERATURES AND COOLING
Monitoring temperatures will extend the lives of the batteries and
motors. There are many options available that will help you monitor
temperatures and cool your components .
Temperature sensor
To accurately monitor motor temperature and
prevent overheating, a telemetry temperature
sensor (part #6523) can be installed on the
motor to continually monitor temperature as
you drive. Generally, try to keep your motor
below 200° F. If necessary, increase airflow to
the motor by cutting out the rear of the body or
windshield.
Heat sink cooling fan
The VXL-3s is equipped with an additional
connector to supply power to an optional heat
sink cooling fan (part #3340). The optional heat
sink cooling fan can assist in cooling the VXL-3s
in high current motor applications.
Battery
Pinion/Spur
mAh
Skill Level
* Stock Gearing
#6808
Slash 4x4
Nominal Voltage
60+mph
60+mph
35+mph
13/54*
7-Cell NiMH
8.4V
4000+ mAh
40+mph
18/54
7-Cell NiMH
8.4V
4000+ mAh
40+mph
19/54
2S LiPo
7.4V
4000+ mAh
45+mph
13/54*
3S LiPo
11.1V
5000+ mAh
3S LiPo
11.1V
5000+ mAh
19/54
Velineon 3500 Specs
Type:
Sensorless brushless
rpm/volt:
3500
Magnet type:
Ultra High-Temperature
Sintered Neodymium
Connection type :
3.5mm bullet
Wire size:
12 Gauge
Max rpm:
50,000
Diameter:
36mm (1.42) (540 size)
Length:
55mm (2.165)
Weight:
262g (9.24oz)
The VXL-3s features Locked
Rotor Protection. The VXL-3s
checks to make sure the
motor is turning. If the motor
is locked or damaged, the
ESC will enter fail-safe until
the motor is free to rotate.
Always use the proper length
motor bolts. The standard
motor mounting bolts
are 3x8mm. Using motor
bolts that are too long can
interfere with the motor’s
rotation and damage the
motor’s internal parts!
# Spur Gear Teeth
x 2.85 = Final Gear Ratio
# Pinion Gear Teeth
