The Power Commander is a fuel injection and ignition timing (on some
models) adjustment unit that simply plugs inline with the bike or quad's
stock ECU (electronic control unit). The PC uses original equipment
style connectors so that no splicing or cutting of the harness is
required. Most installations take less than 15 minutes, some as little
as 5 minutes. Changes are made to the fuel and ignition curves via the
PC's onboard microprocessor. Using this technology Dynojet is able to
offer a large area of adjustment without making any permanent changes to
the ECU. Removing the PC returns the
bike or quad to its previous stock condition. The Power Commander also comes
complete with software and cable link that allows you to change between
different maps or make adjustments to a map file.
Power Commanders for some models can also control the Ignition Curve.
You can adjust the ignition curve for increased part throttle response,
increased peak power, or to eliminate detonation. On most models the
ignition curve is close to optimum for pump fuel. In some cases it is
possible to increase part throttle torque by adjusting the timing. With
high octane racing fuel further gains can be realized at wide open
throttle. If heavily loaded or during hot weather the PC can be adjusted
to eliminate the pinging that is so common during these conditions.
How much power will the Power Commander give me?
Well that can depend upon many things but what we can tell you is
this, the perfect air/fuel ratio will ensure that the engine can
produce the maximum possible horsepower for that given combination.
We must also understand that a typical rider spends a great
deal of time riding in part throttle conditions. Shown below are two
graphs of a motorcycle before and after installation of the Power
Commander. The top graph shows the horsepower curve accelerating at
a 40% throttle opening and the lower graph shows the corresponding
air / fuel ratio. You can see a large horsepower increase between
the two. The red curve shows a typical stock motorcycle with minor
performance modifications (slip-on exhaust). The blue curve shows
that same combination with the PC installed and you can see that the
line is nearly straight. So the rider will feel a large improvement
while riding the motorcycle and it is very possible that the peak
wide open throttle horsepower is unchanged. The correct air/fuel
ratio number (say 12.9:1 or 13.2:1) depends upon many factors like
combustion chamber design but what we want is that figure at every
point in the curve (straight line).
How can I tune my motorcycle or quad with the Power Commander?
Base Map: The Power Commander is supplied with a given (base) map
stored in the microprocessor. This (base map) is typically a map
that has been developed to provide an improvement for most
combinations matching the map description (i.e. stock bike or
performance exhaust and air filter). In general we have found that a
typical stock bike has areas in the fuel curve that are far from
optimal for drive-ability and performance. We could say that they
are typically 70% optimized in stock condition and 60% - 65% with
minor performance modifications. After installation of the Power
Commander with the base map, we would expect to see 85%-95%