| Author | Message | ||
     Jfox |
Who makes the ignition / throttle/body/fuel injection setup? Is it "fly by wire" ? Is, it easily programmable for after market accessories? | ||
| M1combat |
It is not fly by wire (I wouldn't buy it if it were). I'm hoping that a version of a Daytona Twin-Tec may work on it. Maybe a modified V-Rod version? I'm not sure but they MAY have changed the EFI system over to the manufacturer that HD uses. | ||
| Xb9 |
I see it has an O2 sensor on the front cylinder, does it use an O2 sensor on the rear cylinder also? | ||
| Ma1 |
Arrrggghhh!! ALL electronic fuel injection is essentialy "Fly by wire". The only real change is where the position sensor is located, IE in the throttle body or on the grip. You think there are manual control cables running to the injectors? | ||
| Knickers |
Electronic fuel injection and "fly by wire" are light years apart, though most of the differences are in ways you can't see. We may only see replacement of the throttle cables with a stepper motor. What we don't see are the thousands of lines of code in the ECM it takes to make it work, seamlessly, reliably, and most important safely. It seems like the program should be as simple as "If twistgrip position = X then throttle position=Y" But what do you do when something goes wrong with a sensor, or the stepper motor? Can't have it do the wrong thing and all of a sudden put 146hp to pavement without the rider asking for it. Often with these systems the manufacturers essentially build two computers into the ECM. One to watch what the other is doing and shut down the system if the two computers don't agree. There are an almost infinite number of ways a system can deteriorate or fail and it takes a lot of brainpower to figure out how to make the fly by wire brain work. Some bike's are using a hybrid system where there are dual throttles, one controlled by the ECM, the other controlled by the rider. This way the computer can always give you less power than you ask for (say if you're whacking the throttle open 100% at 1500 rpm), but it can never give you more. -Kurt | ||
| Fullpower |
ahh yes, but whatever the algorithms, did you notice the 61 mm throttle bodies?? did ya see that? and the 2.6 inch stroke? that looks like great big fun there whacking a PAIR of 61 mm holes open, over a 12.3 to one compression short stroke v twin. that right there sounds like pure fun to me. As soon as they build a naked one I am on it. | ||
| Anonymous |
The entire fuel/ignition system is the Buell DDFI III system which is mixed open/closed loop with dual O2 sensors. The throttle bodies are mechanically opened, not throttle by wire, although there is a secondary electronic throttle control system that is activated by the ECM in certain conditions for drivability. It works very well. | ||
| M1combat |
That's what I was going for was the throttle by wire... I want to ALWAYS be able to close the throttle when I need/want to  . I'm a computer geek and I don't trust computers to do what I ask them to when my life is on the "wire". Also... I can't STAND the feel of the fly by wire systems in cars. The throttle feels like a spring loaded paddle of crappyness... In my truck it gives feedback as it's about to kick down. The tension gets greater and greater until it decides to shift. It also has a sweet spot with regards to tension where , if you can sense it finely enough, you can gradually increase the throttle with RPM keeping the same tension on the peddle and it makes more power than if you just mashed it to the floor. Fly by wire sucks for a "driver". |
