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18 

 Revo 3.3

THE TRX 3.3 RACING ENGINE

TERMS TO KNOW

You’ll find these Nitro R/C engine terms throughout this section 
of the manual.

.15

 - .15 or “15” refers to the displacement of the engine. The TRX 2.5 

Racing Engine is .15 cubic inches or 2.5 cubic centimeters (cc). The 
name “TRX 2.5” is derived from the cc measurement. 

.20 -

 .20 or “20” refers to the size of the engine. The TRX 3.3 is .20 

cubic inches or 3.3 cubic centimeters (cc). The name “TRX 3.3” is 
derived from the cc measurement. 

ABC 

- Abbreviation for aluminum, brass, and chrome. Refers to 

engine construction that consists of an aluminum piston that slides 
in a chrome-plated brass sleeve. The TRX 3.3 uses ABC construction.

Air filter

 - The air filter sits atop the carburetor and prevents harmful 

dust and dirt from entering the engine. Dirt ingestion is the number 
one cause of premature engine failure so the engine should never 
be run without the air filter in place.

BDC

 - Bottom dead center. The bottom-most position of the engine  

piston stroke.

Break-in

 - Break-in is the procedure for running a brand new engine 

according to specific instructions. This correctly prepares the engine 
for normal running. The break-in procedure can be different for 
different makes of engines. Follow the Traxxas directions for break-
in exactly. 

Carb

 - Abbreviation for carburetor.

Carburetor

 - The carburetor atomizes (mixes) the fuel with the air 

so that the engine can burn it. There are two types of carburetors; 
slide carbs and barrel carbs. The TRX 3.3 uses the superior slide 
carburetor design.

Clean-out

 - Cleaning-out is a condition that occurs when the engine 

is accelerating and the fuel mixture becomes sufficiently lean to 
allow the engine to continue into its upper rpm power band. It 
is usually characterized by a noticeable decrease in blue exhaust 
smoke and a dramatic increase in engine speed. 

Combustion chamber

 - The combustion chamber is machined into 

the bottom of the cylinder head. This is where the glow plug ignites 
the fuel. The shape of the combustion chamber is designed to 
promote more efficient burning of the fuel.

Connecting rod 

- The connecting rod transfers the piston motion 

to the crankshaft. The TRX 3.3 Racing Engine uses a “knife-edged” 
connecting rod. The aerodynamic, sharpened edges allow it to 
“slice” through the pressurized air/fuel mixture inside the crankcase.

Crankcase 

- The engine’s “body” that contains all of the running 

mechanical components.

Crankshaft

 - The main shaft of the engine that holds the  

reciprocating assembly.

Cooling fins

 - The cooling fins are milled into the cylinder head and 

crankcase and cause heat to be drawn away from the engine. Heat 
is removed when it dissipates into the air passing across the cooling 
fins. It is important to keep the fins clean of dirt and debris for 
maximum cooling efficiency.

Cylinder head (head)

 - The finned aluminum part on top of the 

engine that is responsible for dissipating most of the engine’s heat. 
The combustion chamber is machined into the bottom of the head. 

Dyno 

- Abbreviation for dynamometer. A precise piece of testing 

equipment that accurately measures engine power and torque 
output over the engine’s entire rpm range. 

EZ-Start

 - Traxxas on-board electric starting system. The system 

consists of a hand held starter control unit and an on-board 
gearbox with an electric motor to spin the engine. 

Fit

 - Usually refers to the fit of the piston and sleeve. If the fit is tight, 

the piston will feel very tight at top of the sleeve (top dead center), 
and the engine will have good sealing and compression. If the fit 
is loose, compression will be low and both the piston and sleeve 
should be replaced. 

Flame-out

 - Occurs when the engine stops running at high rpm. 

Usually the fault of an excessively lean fuel mixture or glow  
plug failure.

Fuel

 - (10%, 20%, 33%) The TRX 3.3 must have model engine fuel to 

run. Traxxas Top Fuel

 is recommended. Fuel is sold in quarts and 

gallons from hobby dealers. The 10%, 20% and 33% labeling refers 
to the percentage of nitromethane contained in the fuel.

Fuel mixture 

- The ratio of fuel to air as determined by the needle 

settings of the carburetor.

Fuel tubing (fuel line)

 - The thick silicone tubing that carries fuel  

from the fuel tank to the carburetor. 

Glow plug

 - The glow plug is located in the cylinder head at the top 

of the combustion chamber. It contains an element that glows red 
hot when voltage is applied. When the engine is being started, 
the heat from the glow plug ignites the fuel mixture and starts the 
combustion process.

Glow plug driver

 - This tool clips onto the glow plug and supplies the 

required voltage to light the glow plug element. It is also called an 
igniter. EZ-Start equipped engines do not require this separate tool.

Header

 - The aluminum tube that connects the exhaust system to the 

engine exhaust port. The length and diameter of the header must 
be carefully selected to extract the most power from the engine.

Содержание Revo 3.3 5309

Страница 1: ...MODEL 5309 owners manual...

Страница 2: ...axxas engineers designed into Revo Even if you are an experienced R C enthusiast it s important to read and follow the procedures in this manual Revo contains new technologies in the engine suspension...

Страница 3: ...Traxxas com You may also e mail customer support with your question at support Traxxas com Join thousands of registered members in our online community at Traxxas com Traxxas offers a full service on...

Страница 4: ...n the presence of fuel or fuel vapors The engine brakes and exhaust system may become extremely hot during use Be careful not to touch the parts especially when refueling or stopping the engine Prolon...

Страница 5: ...see Use the Right Batteries on page 10 Glow plug wrench Extra glow plug 17mm wheel wrench 1 5mm L wrench 2 0mm T wrench 2 5mm T wrench 8mm slipper clutch wrench Shock wrench 5mm turnbuckle wrench Susp...

Страница 6: ...ressure Line Fuel Line EZ Start Motor EZ Start Plug Bulkhead under chassis Body Mount Post Chassis Slipper Clutch under roll hoop Spur Gear under roll hoop Driveshaft Half Shaft On Off Switch Shift Ro...

Страница 7: ...r the transmitter sold separately Follow the break in instructions exactly to ensure the best performing longest lasting engine 5 Install the EZ Start battery See page 24 13 Tune your engine See page...

Страница 8: ...en trying to smooth it out will result in air pockets Antenna On Off Switch Receiver RX Power Pack 5 cell NiMH Battery Steering Servos Throttle Servo Shifting Servo micro servo OptiDrive ESM Electroni...

Страница 9: ...on the 2 4GHz digital spread spectrum system mAh Abbreviation for milliamp hour A measure of the capacity of the battery pack The higher the number the longer the battery will last between recharges N...

Страница 10: ...attery on the floor or in other locations where someone may accidentally damage or disconnect the battery When plugged in the charger s LED will glow green indicating the charger is ready to begin cha...

Страница 11: ...tage After connecting a fully drained battery to the charger it may take up to 15 seconds for the charger to sense the battery and begin to charge To start charging immediately plug the battery pack i...

Страница 12: ...o adjust the OptiDrive and readjust the throttle and brake linkages to operate properly with the new throttle neutral setting Electronic Throttle Trim The electronic throttle trim located on the face...

Страница 13: ...een twice and then release the button immediately You are now in programming mode 4 Pull the transmitter throttle trigger to the full throttle position Hold it there until the Function LED flashes gre...

Страница 14: ...eck that the steering mechanism is not loose or binding If the steering operates slowly then check the receiver pack to make sure it is fully charged 5 When looking down at model the front wheels shou...

Страница 15: ...ail safe mode has been deactivated Use these steps to reactivate the fail safe system 1 Switch the transmitter and receiver on 2 Press and hold the receiver s LINK button The LED will flash once then...

Страница 16: ...premature engine wear and failure is lack of care and maintenance BREAK IN The TRX 3 3 Racing Engine is manufactured to exacting tolerances and requires a specially designed break in procedure to acco...

Страница 17: ...l Carburetor Air Intake Fuel Intake High Speed Needle Idle Speed Screw Clutch Bell Crankcase Two Stage Air Filter Glow Plug EZ Start Plug Positive Wire Negative Wire Fuel Line Fuel Tank Tuned Pipe Hea...

Страница 18: ...ngine s body that contains all of the running mechanical components Crankshaft The main shaft of the engine that holds the reciprocating assembly Cooling fins The cooling fins are milled into the cyli...

Страница 19: ...the first level of air filtration for the engine The majority of dirt and debris will be stopped by this filter Clean re oil and replace this filter after every hour of run time Always use both the p...

Страница 20: ...limitations Engines are designed to run best within a range of nitro percentages How the engine is ported the size of the combustion chamber and other factors determine how much nitro can be efficien...

Страница 21: ...t pull straight up 2 Remove the pre filter element 3 Clean the pre filter element by thoroughly washing the foam element in hot soapy water dishwashing detergent works well Repeat twice 4 Thoroughly d...

Страница 22: ...rect air fuel ratio The tuning needles are there to adjust how much fuel is made available for the carburetor to mix with the available air atomization The Fuel Mixture Needles The amount of fuel mete...

Страница 23: ...unning to assess what minor adjustments may be required to compensate for fuel temperature and altitude Adjustments are usually made in 1 8 or 1 16 turn increments If the engine sticks at top dead cen...

Страница 24: ...tery in place when the battery is installed in the compartment C 4 Install the battery into the compartment and press the wires securely into place 5 Snap the battery compartment door back on and lock...

Страница 25: ...piston and the top of the sleeve This is a tapered fit and a tight piston sleeve fit on initial startup is desirable for those who want the best performing engine Make sure you are using a good quali...

Страница 26: ...e Change or clean your air filter after break in Follow the instructions exactly for each of the first 5 tanks of fuel Starting Your TRX 3 3 Racing Engine for the First Time Before you start your TRX...

Страница 27: ...3 When the fuel tank is nearly empty shut off the engine and refuel From here on you do not need to let the engine cool between tanks Tank 4 1 Driving procedure Gently pull the throttle trigger to fu...

Страница 28: ...is over 220 F and needs to cool down If the water takes a long time or does not evaporate at all then the engine is too cool We do not recommend that you operate your engine below 35 Fahrenheit If yo...

Страница 29: ...unterclockwise and retest This setting will extend engine component life Low Speed Fuel Mixture Adjustment The low speed mixture is always set after the high speed needle is correctly adjusted The low...

Страница 30: ...uence on engine temperature is air temperature Expect the engine temperature to vary almost in direct proportion to air temperature Assuming you tuned the engine for the same maximum performance each...

Страница 31: ...ted by speed Towing creates a high load on the engine and at the same time limits cooling of the engine due to low vehicle speed If your Revo gets stuck stop driving immediately Move the vehicle and t...

Страница 32: ...d rear springs on Revo have different spring rates The rear springs are about 10 stiffer than the front springs The spring s pre load tension can be adjusted by turning the spring pre load adjuster Ad...

Страница 33: ...ion damping to be reduced Damping should be increased with higher viscosity oil if the model is bottoming easily over jumps Damping should be decreased with thinner viscosity oil if the model is hoppi...

Страница 34: ...he wheel moves up and down through its range of travel Static camber is the camber angle at the wheel when the vehicle is set at its normal stationary ride height The suspension pivot balls located in...

Страница 35: ...ole in the end of the slipper shaft This locks the shaft for adjustments Turn the adjustment nut clockwise to tighten less slippage and counter clockwise to loosen more slippage The slipper clutch has...

Страница 36: ...djusting the Spur Gear Clutch Bell Gear Mesh The ideal spur gear clutch bell gear mesh for Revo is 0 1mm To set the gear mesh place a strip of standard letter A4 size copy or printer paper about 0 1mm...

Страница 37: ...in one of the following ways 1 Use a 0 50mm feeler gauge between the brake pad insert and brake disk 2 Push the outer brake pad firmly against the inner pad with your finger sandwiching the brake dis...

Страница 38: ...uld be replaced when they no longer seal effectively loss of compression Symptoms include the engine being difficult to start when warm stalling when warm and stalling when throttle is suddenly closed...

Страница 39: ...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 P...

Страница 40: ...to the opposite end For example increasing roll resistance in the rear by installing the upper arms in the lower holes will provide more traction for the front wheels and potentially more steering Ins...

Страница 41: ...of the various rocker arms on wheel force as the suspension is compressed On the progressive rate wheel force is light at first and increases as the suspension is compressed Bump Steer Elimination Cha...

Страница 42: ...ly move the piston up and down always keeping it submerged in oil to release the air bubbles Let the shock sit for a few minutes to allow any remaining air bubbles to surface 10 Slowly thread the uppe...

Страница 43: ...ts and to the rocker arms 2 Install long travel shock springs Replace all four of the 90mm travel shock springs with the four 120mm long travel shock springs The front shock springs are indicated by a...

Страница 44: ...1100 Klein Road Plano Texas 75074 1 888 TRAXXAS 090625 KC1185 R01 MODEL 5309 owners manual...

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