Power To the People

POWER TO THE PEOPLE

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WHEN THE FUELinjection wave burst over the motorcycling world we cheered because fuel-injection solves problems that carburetors cannot. Then we had second thoughts. What about modified bikes? How do you correct the mixture of a computer-controlled fuel-injection system?

Professional race teams can laboriously map fuel-injection data on a dyno. upload new factory-developed fuel curves to their bikes from laptop computers or plug in a trick factory fuel-map chip. What about the rest of us?

Along came Dynojet (www.dynojet.com) with its Power Commander. It allowed users to alter fuel-injection mixture strength by sending “adjusted” sensor data (called “sensor offset”) to their bikes’ engine control computers. If the Power Commander fools the computer into thinking the weather has cooled or the barometer has risen, the fuel mixture is obediently enriched. The Pow er Commander was useful and fuel maps were developed for many popular aftermarket parts combinations.

Bike manufacturers then limited the ranse of sensor data.

and Dynojet responded with a new system that no longer used sensor offset. It instead adjusted the output signals coming from the computer to the injectors. Call this “pulse w idth correction.”

Then Dynojet decided to foster a radical revolution in the tuning of fuel-injection engines. The normal method of mapping a complete fuel curve is beyond the means of most of us-testing on a dyno in hundreds of rpm steps, varying the mixture strength and monitoring power to find the correct mixture at each step.

So company engineers asked. “Why not let computers do this for everyone?” With Dynojet*s new fuel-mapping software, the bike is placed on a Dynojet 250 or 200 dyno equipped with an air/fuel-ratio module (real-time exhaust oxygen sensor), and S. the test is controlled by the ^ “Tuning Link Software.” In a single 20-to-40-second accelerating run, or at most in two such runs, the software performs the work of factory fuel-mapping technicians automatically. The result is a new fuel map, correct for the bike as it sits on the dyno with whatever special tuning parts, cam phase or aftermarket options it may have.

This unique fuel map is then installed in your Power Commander and your modified bike now runs as if its fuel system had been professionally mapped-because it has.

This system was used at Daytona to produce a new fuel map for Miguel Duhamel's Honda CBR600F4i.

This service is now available at appropriately equipped Dynojet “Power Commander Tuning Centers.” whose personnel have received factory training. Kevin Cameron