Powercommander
What is a Powercommander ? The PC is a fuel injection and ignition timing (on some models) adjustment unit that plugs "inline" with the bikes' stock ECU. 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 bikes fuel and ignition curves via the PC's onboard microprocessor. Using this technology we are able to offer a large area of adjustment without making any permanent changes to the bikes' ECU (electronic control unit). Removing the PC returns the bike to its previous stock condition. The Power Commander can be ordered preprogrammed with a your choice of several settings, based on the modifications to your bike. The unit also comes complete with software and cable link that allows you to change between different maps or make adjustments to a map file. |
The New Powercommander V The New Power Commander V is loaded with tons of new features. It is compatible with 2009 and newer bike models. Below you will find some Power Commander V features. - Reduced size from PCIIIusb (less than half of the size of PCIII) - USB powered from computer (9 volt adapter is no longer needed for programming) - 2 position map switching function built in (map switch not included) - Gear input (allows for map adjustment based on gear and speed) - Analog input (allows user to install any 0-5 volt sensor and build an adjustment table based on its input such as boost or temperature) - With gear position input connected the PCV is capable of allowing each cylinder to be mapped individually and for each gear (for example: on a 4 cylinder bike with a six speed transmission there could be up to 24 separate fuel tables). - Unit has a -100/+250% fuel change range (up from -100/+100%). This allows more adjustment range for 8 injector sportbikes - 10 throttle position columns (up from 9 on PCIIIusb) - Enhanced “accel pump” utility (increased adjustment and sensitivity ranges) |
Well that can depend upon many things but what we can tell you is "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 street 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).