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Priming - Manually causing fuel to move from the fuel tank up
to the carburetor.This is sometimes necessary after the engine
has been sitting for a long period of time and all the fuel has
drained back to the tank.On a Traxxas model this is done by
holding your finger over the exhaust tip for one or two
seconds while the engine is starting.
Punch - A term that refers to how quickly the model responds
to throttle input or how quickly it accelerates.
Rich - A running condition where the engine is getting too
much fuel for the available air. It is better to run an engine
slightly rich to increase engine life. Excessively rich mixtures
cause the engine to have sluggish performance with
exaggerated blue smoke and unburned fuel coming from the
exhaust.
RPM - Abbreviation for revolutions per minute (how many times
the engine crankshaft spins in a minute).
Sleeve - Internal engine part that contains the piston.The
precise fit between the sleeve and the piston creates a seal
that allows engine to have the required compression for
combustion.The sleeve in a TRX engine is made of brass and is
then hard-chrome plated.
Slide carburetor - The throttle on a slide carburetor closes and
opens by sliding a barrel in and out of the carburetor body.
This type of carburetor is preferred for performance use
because it provides a less restrictive “straight-through”air path
than the barrel carburetor design.
Stall - When the engine stops running,usually due to an
incorrect fuel mixture setting or running out of fuel.
Tuned pipe - The tuned exhaust pipe usually consists of a
specially-shaped metal or composite chamber with baffles
that is designed to enhance the power output of the engine.
Wear-in - Fitment process that occurs during engine break-in
where internal engine parts develop an even more precise
matched fit through actual use under controlled
circumstances.
WOT - Abbreviation for wide-open throttle.
The TRX 2.5 Racing Engine
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