BSD Racing BS903T User guide

BSD – Racing

GRANITE MUNCHER

GRANITE MUNCHER1/10TH NITRO TRUCK.18 ENGINE
MODEL No: BS903T

Specifications:

Length: 410mm
Width: 320mm
Height: 165mm
Wheelbase: 305mm
Tyre size: 100x 51 mm
Ground Clearance: 25mm
Engine: .18 #

Instruction Manual

Features:

• Advanced 4WD Drive System.

• Factory Assembled & Ready-to-Run.

• Powerful .18 Nitro Engine.

• 2 Speed Automatic Transmission.

• Oil Filled Dampers.

• 2.4GHz Proportional Radio Control System.

• Quality Bevel Gear Differential.

• 75cc Fuel Tank

IMPORTANT NOTICE

This Century UK- BSD car is very tough, but it is not indestructible. In common with all R/C
cars, stresses and vibrations can cause screws and fastenings to work loose. It is your
responsibility to carry out regular checks, tighten screws where necessary and generally
maintain the car to ensure optimum performance and reliability.

SAFETY PRECAUTIONS

This high performance radio-controlled car is not a toy. Used incorrectly it is capable of inflicting
serious harm to persons or property.It is not recommended for use by children under 14 years of
age unless supervised by a suitably experienced adult.Please read the contents of this manual
prior to operating. If you are uncertain regarding any aspect of its safe operation please contact
your Century UK - BSD dealer to seek help or advice.

www.centuryuk.com

Equipment required for operation

1. Tools required for maintenance:

WARNING!

Do not use a power screwdriver to remove, install or tighten any screws that locate into
plastic moulded parts. The high operating speed of these tools may cause the threads in
the plastic mouldings to be damaged or stripped.

2. Further items required:

8 pcs AA alkaline
batteries for transmitter.

Your car is supplied with a mains operated Ni-MH battery charger. A full charge of the
battery pack will take approximately 7hours. You may also wish to purchase a “Fast”
charger. If so, we recommend one of the following Century UK Power-Tech chargers:-

IMPORTANT!

Regularly check all screws and fasteners are secure before operating this model. We
recommended the application of a small amount of thread-lock to screws that work
loose from metal components.

Transmitter Specifications:

Channels : 2
Model Type : Car/Boat
Frequency : 2.4GHz
Power :12V DC (8 x AA batteries)
Charging Port : Built-in (centre pole +)
Low Voltage Warning : Yes (below 9V)

Note:

The antenna on the receiver must be
positioned vertically to achieve optimum
range(Figure 1).It must be kept away from
any metallic or carbon components.

Transmitter Operation:

Your Century UK-BSD car features a quality 2.4 GHz radio control system. Under normal circumstances it is
virtually immune to interference from other radio controlled models. All 2.4GHz systems are required to
undergo a process called “binding”. This is where a receiver is programmed only to respond to commands
from one unique transmitter. The binding process has already been carried out at the factory by default.
Under certain circumstances it may be necessary for a 2.4GHz system to require a re-bind. In this event,
please refer to the following instructions.

Binding:

1. Ensure you have fresh batteries installed in the transmitter.

2. Insert the “bind-plug” into the port on the receiver marked: CH3. (Figure 2).

3. Connect a receiver battery (4.8V DC) to the receiver port marked VCC. The two LEDs on the receiver will flash
rapidly, indicating that it has entered the binding mode.

4. Press and hold the bind button on the transmitter, and simultaneously turn on the power switch.Note: The
bind button is recessed to prevent accidental operation.

5. Continue to hold the bind button. After approx. 5
seconds the receiver LEDs will stop flashing, indicating
that binding has taken place.

6. Release the bind button on the transmitter and remove
the binding plug from the receiver.

7. Connect the steering servo to the receiver and operate
the steering function on the transmitter to test the system.

8. If the test is successful, remove the power supply from
the receiver port marked VCC.

9. The binding process is now complete.

Bind Button

Bind Plug

When operating the model, always
comply with the following procedure:

Turn On:

1. Turn on the power switch on the transmitter first.

2. Connect the power supply to the receiver.

3. The receiver LED should illuminate without flashing.

4. Follow engine starting procedure.

Turn Off:

1. Stop the engine.

2. Disconnect the receiver power supply.

3. Turn off the transmitter.

Failure to comply with this procedure could
result in a total loss of control.

Transmitter Functions:

Dual Rate

DSC FOR SIMULATOR

ALWAYS:

Position the car so the wheels are not touching the ground before connecting the battery.
Check before you drive that the model is responding in the correct manner to your transmitter, i.e. moving
the steering wheel to left will result in the car turning to the left.
Check the position of the steering and throttle trims before driving, failure to do so could result in the car
not responding to controls as expected.
Check the power level of your transmitter batteries prior to use.
Driving with exhausted batteries could lead to a loss of control.
Keep long hair and loose clothing away from all moving parts of the car.
Look after the car by keeping it clean and free of dust and dirt.

NEVER:

Never drive it close to other people or property.
Never operate this model on public roads.
Never operate this car in the rain, drive through puddles or wet grass. Water could seriously damage the
electronic systems.
Never touch the motor or ESC after the car has been driven, they can get very hot.

The steering function
controls the direction of the model.

The trigger function
controls the speed of the vehicle.

ENGINE TUNING GUIDE

MAIN MIXTURE CONTROL NEEDLE

The main mixture control needle points upwards from the carburettor
(see image). It controls the fuel/air mixture supplied to the engine.
The needle is factory set for runningin, at 4 1/2 turns out (anti-clockwise)
from its fully closed position. Once run in, the main mixture control
needle would typically be set2 and 2-1/2 turns out from fully closed.
You should be aware that the main mixture control needle settings will
require small adjustment dependingon the temperature, humidity and
even the altitude above sea level.

IDLE STOP SCREW

The idle stop screw is located towards the rear of the carburettor
(see image). The purpose of this screw is to set the speed at which
the engine idles or “ticks over”. It has no effect on the mixture control
settings of the engine and has been pre-set at the factory to default
settings. With the air filter removed, you will be able to see the barrel
inside the carburettor. With the throttle set to idle, the gap visible on the
barrel should be around 1mm. Any changes to the idle speed of the engine
will require only very minor adjustment of this screw. We recommend that
the screw is set to allow the engine to idle at the lowest speed possible.
Running the engine with an excessively high idle speed could result in the
centrifugal clutch partially engaging. This could result in premature wear of the brakes or a
complete failure of the clutch assembly. After making any adjustments replace the air filter
immediately. Never operate the car without the air filter fitted to the carburettor.

MAIN MIXTURE
CONTROL NEEDLE

IDLE STOP
SCREW

RUNNING THE ENGINE

STARTING THE ENGINE

IMPORTANT!

The radio system must always be switched on and operational when the engine
is started. Never switch off the transmitter or receiver with the engine running.

1. Fill the fuel tank withfresh model “nitro” fuel containing no more than 20% nitromethane.

2. To prime the engine when cool, place your finger over the tuned pipes exhaust exit and
gently pull the pull start several times. You will notice that fuel will travel through the fuel
line towards the carburettor. Be careful not to over-prime. You should stop priming when
the fuel reaches the carburettor.

3. Ensure that your glow start (not included) is fully charged and attach to the glow plug
situated in the cylinder head of the engine.

4. With the throttle set to idle, start the engine by pulling the recoil starter handle using short,
quick pulls. Do not pull the recoil starter out to its maximum. If you do, it is most likely that
you will weaken the pull start return mechanism and it could fail entirely.This will not be
covered by the warranty on your car.You only need to pull the starter out to a maximum of
around 20cms or 8”. Sometimes when the engine is already hot, it can be easier to start the
engine at a higher throttle setting (1/4 to ½throttle). When the engine starts immediately
return the throttle setting to idle. Failure to do this can cause the engine to over –rev and
cause serious damage.

STOPPING THE ENGINE

To stop the engine, pinch the fuel line that runs to the carburettor. Pinching this line will
restrict fuel flow and the engine will stop within a few seconds. Never place your finger
over the exhaust to stop the engine. This could result in serious burns to your finger and
could also cause fuel to “back-up” inside the engine, making it harder to start next time.

IMPORTANT! HOW TO CLEAR A FLOODED ENGINE

If you feel excessive resistance when pulling the engine recoil assembly, it may be that the
engine has too much fuel inside. This is known as being “flooded”. It is very important that
you recognise if your engine becomes flooded. Failure to follow these instructions could
result in serious damage to your recoil assembly or internal engine components.

1. Remove the glow plug from the engine.

2. Turn the car upside down.

3. Pull the recoil assembly 5-6 times.

4. Replace the glow plug and repeat the starting procedure.

BREAK-IN PROCEDURE

THINGS TO REMEMBER DURING BREAK-IN

1. Run the car with the bodyshell removed. This will keep the engine cooler.

2. Always run the car with the air filter fitted.

3. Run the car on a smooth, hard surface. An empty car park or similar is perfect.

4. Use the same fuel for break-in as for regular operation.

5. Do not accelerate or decelerate quickly.

6. The break-in procedure can put excessive strain on the glow plug. It is recommended you
keep a few spares on-hand.

7. DO NOT allow the engine to overheat.

FIRST TANK OF FUEL

The main mixture control needle should be set at a very rich setting. This will allow the fuel
to carry lots of oil to the internal parts of the engine during the break-in procedure.

1. Open the main mixture control needle (counter clockwise) 4½ turns from the fully closed
position. When closing the main mixture control needle, stop when you feel resistance.
Excessive force will damage the carburettor.

2. Fill the fuel tank with model fuel containing no more than 25% nitromethane.

3. Follow the engine starting instructions.

4. Run the car on a smooth surface with the body shell removed.

5. Run the car at medium speeds, avoiding excessive acceleration or deceleration.

6. Run the car until it is almost, but not out of fuel. If the car runs out of fuel the mixture will
become too lean and this could cause damage to the engine.

7. Stop the engine and allow it to cool. This will take around 15 minutes.

NOTE:
If your engine will not idle consistently, increase the idle speed by turning the idle stop
screw clockwise.

SECOND TANK OF FUEL

Lean the main mixture control needle (clockwise) by ½ a turn. Run the car for the tank of fuel
as for tank 1. Let the engine cool.

THIRD TANK OF FUEL

Lean the main mixture control needle a further ½ turn. Run the car for the tank of fuel as
for tank 2. Let the engine cool.

FOURTH TANK OF FUEL

Lean the main mixture control needle a further ½ turn. Run the car for the tank of fuel and
let cool. At this stage you should notice the car is running much smoother and the engine
will be producing more power.

FIFTH TANK OF FUEL

At this stage your engine will require very small adjustments to the main mixture control
needle. Differences in temperature, humidity, and air pressure will all have a direct effect
on the settings required. Please be aware that it is very unlikely that you will cause damage
to your engine if it is run slightly “rich”. However damage to the engine will result over a
longer period if it is run slightly lean. If your engine is run at a very lean setting it will be
severely damaged almost immediately. We therefore recommended that you run your car
at the richest setting possible that allows for good throttle performance and power levels
without overheating. If in doubt please contact your hobby retailer for further advice.

TUNING TIPS

After the break-in process has been completed, the best way to ensure optimum performance
from your engine is to fine tune it in conjunction with a laser temperature gun. We recommend
the use of the Century UK – BSD laser gun, part No. BS-B7078

Tune the engine so it makes good power, then using the laser temperature gun
fine tune the engine so the temperature of the cylinder head is consistently
below 270F (132C)

Model engines will take a few minutes to reach optimum operating temperature.
Never attempt to tune a cold engine.

ENGINE CARE

Never store the car with fuel left in the tank. We recommend that after the final run of the day
you empty the fuel tank and run the engine at idle until it stops. Then remove the air filter and
glow plug from the engine. Place two drops of after run engine oil into the carburettor and the
cylinder. Then pull the recoil starter several times to circulate the oil. Replace the air filter and
glow plug.

WAYS TO ENSURE GOOD PERFORMANCE AND LONG LIFE FROM YOUR ENGINE

Keep the engine and air filter clean. Dirt on the engine will act as an insulator and the engine
will run hotter.

Do not “over-lean” your engine. Remember you are very unlikely to damage the engine by
running a slightly rich mixture setting.

Do not run the engine with little or no load, or when the wheels are
not in contact with the ground.
Do not allow the engine to get excessively hot.
Do not use fuel with a low oil content, or nitro content in excess of 25%

Do not use old or stale fuel.

Never insert tools into the engine. If you need to remove the flywheel for maintenance
purposes always use a special flywheel wrench to prevent the crankshaft from moving.

Never use silicone sealant on the engine joints. Silicone sealant contains acetic acid which is
highly corrosive to the internal parts of the engine.

Do not allow water to enter the engine. This sounds easy, but you should be aware that
temperature changes will cause condensation to form inside the engine. This is another
good reason to use after- run oil.

We recommend that you store your car in a warm and dry environment. Avoid storing the car
in a garage or shed, as the car will be exposed to extremes of temperature.