In a second series of Honda Racing Championship (HRC) in Kemayoran circuit last weekend (14-15/4), there are different in the paddock Astra Motor Racing Team (ART). One bike that falls in class 1 duck MP 125 cc engine tune-up can race without a carburetor!
Impossible? Of course not, it had been changed to use fuel injection heee .. "Yeah, we're trying to use an injection," Benny Djatiutomo open, tuner who also fronted the mainstay of therapy Star Motor.
A little flashback, since last year has been researching the Star Motor racing berinjeksi mounts. It was still used Yamaha Jupiter Z racing, although not yet worn off. At Honda, the transition from carburetors to injection technology can be faster because of continued research last year.
For the components used, the Star Motor admitted to prefer gado-gado. Several components of the injection system from the grimy Supra X 125, there is of CBR 250R, take the output of Mikuni products and believe in the ECU output Vortex.
Component of the Supra X 125 mostly in the form of censorship. Part of his grimy from Supra X 125 injection system for three generations. Used starting from the crankshaft position sensor, engine oil temperature and manifold absolute pressure (MAP).
Was the throttle body and its contents from Mikuni. 28 mm diameter throttle according to the regulation of duck tune up 125 seeded. Throttle body is fitted complete with throttle position sensor and the water temperature sensor.
For the fuel pump is selected congenital Honda CBR 250R. Where he created a new container in the form of a tube in front of the tank. "The original tank Supra X 125 fuel pump that is right behind him, when his tank chassis we've moved forward position. So created a new fuel pump," said Ade Rachmat, engineering manager at the fuel pump therapy that has a pressure of about 38 psi is .
The pressure of the fuel pump sprayers forwarded to the component that uses a fuel injector CBR 250R default. Unique, but not positioned in the intake is placed outside in front of the muzzle of the throttle body.
"It's been a few research positions. For now, this is the best pengabutannya," said Ade is also good oprek car engine. To place the injector out, a team of Star Motor to have to create a funnel and bracket throttle her.
Was his brain, selected full programmable ECU Vortex for CBR 250R. "Because programmable, plug in the engine Supra X 125 baseball problem," Benny beber Djati. Vortex ECU can adjust the performance of all sensors to determine the timing and amount of fuel spray ignition timing as well.
Special, this ECU can also save 10 mapping and has three settings manually for a round bottom, middle and top. At the time of emergency, when the perceived lack of good mapping can be directly enhanced by turning the last settings manually without opening the software on the laptop.
Unfortunately in her first performance less than the maximum although it is competitive. In the first race, the motor feels brebet on lap down. "And it was good," said Henry Hermawan believed the pilot injection is ngegas duck.
When the pause to wait for the second race only discovered when his MAP sensor would make the setting changes. Vacuum of the combustion chamber is high, even make silly MAP. MAP eventually deactivated by the ECU. The results are encouraging!
Start from a position of 18, Henry Hermawan immediately leapt to seventh position. But definitely, being too eager, over power to make these 19 riders numbered start slide and fall. Apes ..
Power Up 1 hp
Anticipating trouble during the race injection system, this bike is setup with the same engine as carburetor version. Everything is exactly the same from the valve, the duration of back up gear ratio selection.
Although just replace the carburetor to the injection of considerable increase in strength. "The rise of about 1 hp so 23hp. Torque also rises from 14 Nm to 15 Nm," proud to Ade
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