Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Okay, let's cut to the chase. Does your system work on the camhead or not?
I can't follow the techno-speak.
If I understand correctly, this means that things like the "Booster plug" that tricks the temperature sensor will only be effective until the ECU adapts and puts everything back the way it was?
Cutting to the chase, I'm not sure which "system" you mean but the answer's are Hexcode SA's GS-911, Innovate Motorsports's LC-1 & 2, and Nightrider's AF-XIED all work on the camhead. The LC-1 & 2 (with customization by the user) and the AF-XIED both shift lambda and add fuel in a precise way.
You have it exactly right. Let's say both cylinders were exactly equal. A simplified analysis would show, after riding a stock bike for a while, the multiplicative trims would be 1.00. If you then added a BP and rode for several tanks of fuel, the multiplicative trim would decrease to about 0.94. In reality, each trim is different on a stock bike.
If you ran that same ideal stock bike on pure gas and got trims of 1.00 and then switched to fuel with 10% ethanol the trims would average 1.04.
This bike, at WOT and with AF-XIEDs adding about 6% fuel averages an increase to 1.08 on the right cylinder and 1.03 on the left cylinder, for an average increase of 5.5%. You could reduce each trim by 6% to estimate this bike in stock configuration.
I wasn't trying to be a smart aleck, but I've been following your threads for years here and on ADVRider, so I know you've been working on a system for assisting the fueling on many different models of beemers. Hence, my confusion.
Not a problem, I wrote both answers in a hurry. My take-away from this new data coming from the GS-911 (additive and multiplicative trims) is that all the empirical data taken using LC-1s and LC-2s has been proven correct by this new direct set of reports. Until now I had to set up experiments, measuring AFR with the LC-1 and observe the effects of the "trim" values on AFR. Now for the BMSK, it directly reports that things are working the way the experiments (and Bosch BMW documentation) suggested they were.
As more GS-911 data comes in, we will probably get a much better idea of the scope of trims and the variation in motorcycle to motorcycle and left-right cylinder variations. Knowing left-right variations on the R1200 will give us an idea of how big the variations are likely to be on the R1100 and R1200. I don't think many R1200 riders with GS-911s will study the trims so the data will unfold slowly.
The bottom line to me is, what can I do with this? Does it make much difference to tuning the engine? In other words, what's the practical application?
Roger: supplementary to my earlier question: Would an AF-XIED smooth out the abrupt throttle action on my '05 R1200ST?
Thanks for doing all the research on this.
The key question is, has your bike been well tuned and/or are there any other problems.