| Author | Message | ||
     Stretchman |
Has anyone adapted a fuel management system like one of these for the Buell that can adapt on the fly for conditions? It seems that all the necessary components are installed ( I think ) and would make the issue of exhaust changes and other stuff like TPS stuff maybe obsolete. Course I could be mistaken. If anyone knows the situation better than me, at least could you explain it to me please? TIA Stretch | ||
| Hogs |
Stretchman, I`m with ya on that, Also wd. be nice to have a unit that we can watch the a/f ratio on the fly and see where we are at all the time, with regards to weather changes, elevations, mods etc.etc.... I think Jerseyguy has a unit that will perhaps atleast do this,I wd. think that if we knew where the a/f was we could make changes by means of what we have installed to do so... either by TFI, Power Commander,Data link etc. | ||
| M1combat |
The system in the XB adapts very well to changes in pressure, temperature, humidity etc... There's a bit of logic called the "AFV" or "Adaptive Fuel Value" (please don't get confused and call it the "Air Fuel Value"). When the conditions change, the O2 sensor detects the change and sends it's voltage to the ECM. The ECM reads the voltage from that, combined with IAT (Intake air) and HT (Head Temp) and adjusts the "AFV". The AFV is used to reference lookup tables that change the fuel and spark curves as Buell programmed it. It really works very well with a "mostly stock" system. When you drastically change the VE (Volumetric Efficiency) curve of the engine though... It doesn't work QUITE as well. The problem is that if you settle the AFV at 3200 RPM and tune it, then settle the AFV at 3800 where your VE is significantly more or less different as a percentage from stock compared to what it was at 3200, it won't run right any longer. Of course those particular RPM numbers are hypothetical and they would be defined by your intake/exhaust setup. The key is to either get a DIrect Link and have someone tune it that KNOWS WTF they are doing or use a Power Commander... I personally think the Direct link is the best solution (I've used the PCIII and the TFI). I liked the PCIII though. It worked, it's just that the DL offers more flexibility and tune-ability. More options as it were. (Message edited by M1Combat on May 18, 2006) | ||
| Rhun |
I thought only the California XBs had O2 sensors? | ||
| M1combat |
Uhhh, No. The Cali models have a canister of some sort that the rest don't, but they all have an O2. |
