. I learned that at full throttle you're running open loop on a bike, so the wideband O2 sensor isn't going to be as useful as on a car.
Yes BUT...Sorry! Maybe you did not really understand the explanation?
The point is:
The motorcycle injection sys does not have the same effect it does in cars, because in cars the injection is directly into the combustion chamber
, and in motorcycles (because of the high RPM) the injection is into the suction manifold
(to the Throttle Body).
Since the injection in motorcycles is to the intake manifold(Throttle body), and since the spraying of the fuel in the carburetor is also carried out in the intake manifold, That's why there is a similarity between the two devices
in motorcycles: Injection Vs' Carburetor.
3. In injection
the fuel is flow by the pressure created in the fuel pump.
the fuel is flow by vacuum effect (a passive mechanism that works according to Bernoulli's law).
4. The carburetor
works in an open control circuit, if there are changes in atmospheric pressure (cold day versus hot day, riding in the mountains, or riding in the valleys ...) then the operation will not be optimal, and sometimes the main jet will need to be replaced.
system(EFI) has a closed control circuit. The amount of fuel is determined by a number of parameters measured by sensors: oxygen, throttle angle, temperature, pressure, and RPM. The data is collected, and is used as a "Map" for all other engines that are mass-produced. The map is burned in the memory of the engine computer(ECU). Original OEM Engine Control Unit (ECU) have no reprogramming capability.
Thanks to the "Map", the engine automatically adjusts itself to a wide range of situations (hot, cold, etc ...)
It is not enough to buy a ECU kit that gives you the option to program the map you want preference for:
- fuel economy,
- or preference for high power,
- or preference for high torque,
and you need the expensive equipment that will allow you to do it yourself. So whoever wants it should go to a mechanic who has this specialty and he has the required equipment.
So far I have only talked about a change in the computer(ECU), any other change that is made to improving the power, affects the parameters of the amount of fuel and in order to enjoy it to the fullest you need to calibrate the "map"(ECU).