Engines
1. Safety
Never consider your engine a "toy", but a true and proper
internal combustion engine of the last generation, with a power that could
injure yourself or others if not used with due caution. Responsibility for any
damages caused by incorrect use will be due to the owner of the engine who must
use the greatest professional care. If another person uses your engine in any
way, you must ensure they have a copy of this manual. Never start or use the
engine in a closed space. The fuel used for model engines is poisonous. Make
sure it never comes into contact with the eyes or mouth. Always keep the fuel
in a clearly marked container and out of the reach of children. This sort of
fuel for model engines is also highly inflammable.Keep away from any open flame,
excessive heat, sparks or anything else that could set it alight. Never smoke
or allow others to smoke nearby.
These small engines generate high temperatures. Never touch any part of the
engine until it has cooled down. Direct contact with the exhaust pipe, the head
or the manifold in particular will cause severe burns.
2. Equipement
This is an engine for competitions, high-powered with 3.5 cc capacity.
It is supplied with a "C - Conical" glow plug, which improves
considerably engine performance in terms of both power and regular functions,
whilst reducing fuel consumption. Anyone wishing to use the “S – Standard” plug
has to replace only the burn room, found in the spare parts list for this
engine. The air reducers on the
carburetor can be exchanged, thus adapting the engine functions to various
types of tracks and different driving styles. The 7.5-8.5 mm reducer is part of
standard supply, but spare parts include all sizes from 5 mm to 9 mm.
3. Installation.
Mount the engine securely on your model, following the manufacturer's
instructions and using appropriate screwdrivers and wrenches. Install an
efficient exhaust and make sure it remains so. Frequent and close exposure to a
noisy exhaust (especially in the case of powerful high-speed engines) can damage
your hearing and the noise can be bothersome to other people even at a
distance.
Carefully check that the cables for lighting the glow plug and/or the battery
cables for starting the model do not come into contact with any engine's
rotating parts. Check also that the supply system connecting the carburettor
and accelerator servo control have been assembled correctly. To switch off the engine, close the carburetor
completely using the lever that controls the accelerator on the radio handset,
then manually close the suction on the carburettor air filter, or press the
fuel pipe. Never try to switch off the engine by slowing down the flywheel with
your fingers or other metal tools. Immediately
after switching off the engine, when the glow plug is still hot, the engine
could restart WITHOUT the plug battery being connected, due only to the
rotation of the engine parts. For their own safety, keep all spectators (adults
and children) at a distance of at least five metres when you prepare to start
your model car.
4. Start up
Before starting and running in the engine, it is necessary to install
correctly and with great care the following accessories.
The
engine is supplied with its carburetor installed but not firmly fastened in the
standard position. Loosen the fastening screws and place the carburetor in the
ideal position for your model car. Press the carburetor towards the engine
while tightening the fastening screws. Tighten the screw as firmly as possible
without fear of ruining the carburetor body.Now mount the air filter described
previously. Make sure that the surfaces
of the mounted engines are all on the same level and on the same plane. Incorrect
installation can cause, at high temperatures, distortion of the casing,
bearings, etc., resulting in a considerable loss of performance. We recommend
use of the correct screws, according to the type of model, and to check that
the fastening holes are perfectly centred.Check also that the engine casing
does not touch the base of the model's chassis. Now you have completed
the engine with all its parts and mounted it on your model, continue as
follows.
To
guarantee long life and top performance, each engine needs to be run in,
bearing in mind that the more careful the running in is, and the longer
is the period the engine gives its best performance.
Running in must be done carefully with the engine installed on the model, in
the following way:
N.B.: the carburetor needles must be adjusted gradually and
not more than 30°, always checking accurately the effect of any tiny adjustment
on the accelerator.
Make the adjustment patiently, under contest conditions, until the engine
responds rapidly and promptly to accelerator controls.
WARNING!
Adjustments of the carburetor by means of the minimum and maximum
needles cannot be made accurately when the wheels of the model are raised from
the ground since this does not reproduce the real conditions of use, and an
operation of this kind could damage the engine by overheating.
When you reach the optimum carburation, a slight trail of smoke will be
visible during high-speed runs and the engine rotation regime increases
smoothly during acceleration. Remember that, if carburation is too lean, the
engine will overheat and will not give maximum performance.
As for all engines, we recommend setting a slightly oilier carburation
than the optimal point, as a safety measure. If the engine,
with the carburetor completely closed, remains at a too high minimum regime,
loosen the minimum screw in anti-clockwise direction to reduce the opening of
the carburetor throttle.
Never ever exaggerate the number of revolutions because the engine can
reach even 52,000 rpm, which would cause serious damage to the crankshaft and
conrod.
6. Settings
A. Top speed needle: to adjust fuel input at maximum regime, when
the carburetor throttle is completely open.
Turn clockwise (--) to reduce the quantity of fuel, for leaner carburation.
Turn anti-clockwise (+) to increase the quantity of fuel, for an oilier
carburation.
B. Bottom speed needle: to adjust quantity of fuel in partial
acceleration at medium regime, while opening the carburettor throttle.
Turn clockwise (--) to reduce the quantity of fuel, for leaner carburation.
Turn anti-clockwise (+) to increase the quantity of fuel, for an oilier
carburation.
C. Idle adjusting screw: to adjust the engine's minimum regime
when the carburetor throttle is completely closed. Turn clockwise (+) to increase
the minimum regime. Turn anti-clockwise (--) to reduce the minimum regime. N.B.:
although the carburetor settings are already indicatively calibrated by the
manufacturer, they may need to be adjusted according to various uses of engine
and type of fuel.
This engine has been produced using high-tech materials and maximum
precision machines. However, you have to consider that the severe conditions
prevailing during competitions and the use of fuel containing increasing
quantities of nitromethane constitute situations that cannot be controlled by
the manufacturer.
We therefore regret that we cannot extend our normal warranty conditions to
this engine.
Blended fuel: specifically for model racing cars, containing 10% -
30% nitromethane and 8% - 10% oil.
Initially we recommend use of a mix containing less nitromethane (20%), and
more oil (10%).
Later, after running in, you can use more nitromethane (30%), and less oil
(8%).
The ideal is then to use the same sort of fuel, but if you wish to change the
brand or mix, we recommend repeating the running in phase as if the engine were
new.
We want to remind you that the quality of the fuel influences greatly
the engine's performance and useful life, so with blends containing a high
percentage of nitromethane, it generates more power but reduces the life of the
single components..
.
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