Tq 2.4Ghz Advanced Tuning Guide - Traxxas T-Maxx 3.3 4907 Owner's Manual

Clearing a Flooded Engine
If the engine is primed for too long during startup, then it can become
flooded with fuel. When the engine is flooded it will no longer turn
due to excess fuel in the combustion chamber preventing upward
movement of the piston. Use the following procedure to clear a
flooded engine:
1. Remove the blue glow plug wire.
2. Remove the glow plug and gasket with the glow plug wrench
supplied with your model. A 5/16 or 8mm nut driver will also work.
3. Turn the model upside down and plug in the EZ-Start controller.
4. Push the EZ-Start button for several seconds to clear the engine
of excess fuel. Do not look into the glow plug hole while the
engine is spinning or you could spray fuel into your face!
5. Turn the model over and reinstall the glow plug and gasket.
6. Reconnect the blue glow plug wire to the glow plug.
7. Reconnect the EZ-Start controller.
8. Do not prime the engine. Pull the throttle to 1/2 throttle and push
the EZ-Start button. The engine should start immediately.
Piston stuck at "top dead center" (TDC)
"Top dead center" is the position where the piston is at the very top
of the tapered sleeve. Occasionally an engine can get "stuck" at this
position. This is most likely to happen on new engines during break-in,

TQ 2.4GHz ADVANCED TUNING GUIDE

Your Traxxas transmitter has a programmable Multi-Function knob
that can be set to control various advanced transmitter functions
(set to Steering Sensitivity by default, see page 10). Accessing the
programming menu is done by using the menu and set buttons on the
transmitter and observing signals from the LED. An explanation of the
menu structure follows on page 31. Experiment with the settings and
features to see if they can improve your driving experience.
Throttle Sensitivity (Throttle Exponential)
The Multi-Function knob can be set to control Throttle Sensitivity.
Throttle Sensitivity works the same way as Steering Sensitivity as
described on page 10, but applies the effect to the throttle channel.
Only forward throttle is affected; brake/reverse travel remains linear
regardless of the Throttle Sensitivity setting.
Steering Percentage (Dual Rate)
The Multi-Function knob can be set to control the amount (percentage)
of servo travel applied to steering. Turning the Multi-Function knob
fully clockwise will deliver maximum steering throw; turning the
knob counter-clockwise reduces steering throw (note: turning the
dial counter-clockwise to its stop will eliminate all servo travel). Be
aware that the steering End Point settings define the servo's maximum
steering throw. If you set Steering Percentage to 100% (by turning the
Multi-Function knob fully clockwise), the servo will travel all the way
to its selected end point, but not past it. Many racers set Dual Rate so
they have only as much steering throw as they need for the track's
tightest turn, thus making the car easier to drive throughout the rest of
the course. Reducing steering throw can also be useful in making a car
easier to control on high-traction surfaces, and limiting steering output
for oval racing where large amounts of steering travel are not required.
Braking Percentage
The Multi-Function knob may also be set to control the amount of
brake travel applied by the servo in a nitro-powered model. Electric
models do not have a servo-operated brake, but the Braking Percentage
function still operates the same way in electric models. Turning the
Multi-Function knob full clockwise will deliver maximum brake throw;
turning the knob counter-clockwise reduces brake throw (Note: Turning
the dial counter-clockwise to its stop will eliminate all brake action).
TROUBLESHOOTING YOUR T-MAXX 3.3
but can also happen at other times. If the engine
is stuck at TDC, use the following procedure to
release the piston from the sleeve:
1. Remove the glow plug using the included tool
or 8mm (5/16") nut driver and verify that the
piston is at the top of its stroke.
2. Use a flat blade screwdriver to rotate the
flywheel. Place the blade of the driver into one
of the grooves of the flywheel and push down,
turning the flywheel counter-clockwise when
viewed from the front. The flywheel should
turn, unsticking the piston from the sleeve.
3. Put two or three drops of light machine oil into
the glow plug hole to lubricate the piston and
sleeve. Do not use too much oil. It will hydro-
lock the engine. Verify the starter will spin the
engine with the glow plug out.
4. Rotate the flywheel so the piston is at bottom
dead center and replace the glow plug with
gasket. Reconnect the blue glow plug wire.
5. You should now be able to start the engine
with the EZ-Start.
Starting Over: Restoring Factory Defaults
When programming your 2.4GHz transmitter, you may feel the
need to start over with a clean slate. Follow these simple steps to
restore the factory settings:
1. Turn transmitter off.
2. Hold both MENU and SET.
3. Turn transmitter on.
4. Release MENU and SET. The transmitter LED will blink red.
5. Press MENU four times. The transmitter LED will blink red five times.
6. Press SET to clear settings. The LED will turn solid green and the
transmitter is restored to default.
Throttle Trim
Setting the Multi-Function knob to serve as throttle trim will allow you
to adjust the throttle's neutral position to prevent unwanted brake drag
or throttle application when the transmitter trigger is at neutral. Note:
Your transmitter is equipped with a Throttle Trim Seek mode to prevent
accidental runaways. See below for more information.
Throttle Trim Seek Mode
When the Multi-Function knob is set to throttle trim, the transmitter
remembers the throttle trim setting. If the throttle trim knob is moved
from the original setting while the transmitter is off, or while the
transmitter was used to control another model, the transmitter ignores
the actual position of the trim knob. This prevents the model from
accidentally running away. The LED on the face of the transmitter will
rapidly blink green and the throttle trim knob (Multi-Function knob)
will not adjust the trim until it is moved back to its original position
saved in memory. To restore throttle trim control, simply turn the
multi-function knob either direction until the LED stops blinking.
Steering and Throttle End Points
The TQ 2.4GHz transmitter allows you to choose the limit of the servo's
travel range (or its "end point") independently for left and right travel (on
the steering channel) and throttle/brake travel (on the throttle channel).
This allows you to fine-tune the servo settings to prevent binding caused
by the servo moving steering or throttle linkages (in the case of a nitro car)
farther than their mechanical limits. The end point adjustment settings
you select will represent what you wish to be the servo's maximum travel;
the Steering Percentage or Braking Percentage functions will not override
the End Point settings.
T-MAXX 3.3 OWNERS MANUAL • 29
Top Dead Center
Bottom Dead Center