V-Twin Forum : Harley Davidson Motorcycle Forums - View Single Post - Daytona Twin-Tech TCFI tuning

Screw Loose · 03-17-2008, 10:25 PM

Good to see other people finding the MegaLogViewer useful. Ironically when I call Chris at Daytona to ask him about figuring out the BLM values, he told me that I was probably the only one that would care or be able to figure out what I was looking at so he didn't offer much help. He thought most of the people using his product weren't smart enough to figure out looking at a chart with more the two lines on it.

Working with the developer of the MegaLogViewer, he suggested a tweak to my BLM formula (will apparently work better if there's missing data for some reason). You can just go in and edit the previous formula:

Code:

Front BLM = [Status Flags]&4?[Interleaved BLM]:[Front BLM]
Rear BLM = [Status Flags]&4?[Rear BLM]:[Interleaved BLM]

As far as the BLM Cell number field, we probably have to map out what RPM/TP fields correspond to which BLM cell. Seems like a lot of work, and not really worth the effort to me. In other words:

BLM Cell Number = 2 means RPM = 1000 and TP = 0
BLM Cell Number = 24 means RPM = 1500 and TP 2.5
BLM Cell Number = 46 means RPM = 2000 and TP = 5

Since I believe there is 220 cells in the BLM chart, there's some work in figuring all that out. But if we get all that I believe it would be pretty easy within the MegaLogViewer to correlate that BLM Cell Number to RPM/TP in the BLM chart if you think it's actually worth it. I just keep the RPM, and TP as the two values in my top chart.

Another hint...if your trying to compare front and rear values it's often helpful to set the scaling to be the same. Just go to "Calculated Fields" menu -> "Fixed field Min and Max" -> Add Fixed field Min and Max. Make sure you type the field name EXACTLY the same as it's shown in the graph - capitalization counts!! You may also find it useful to normalize some graphs...like Bat Volts. Whenever my bike starts the volts go WAY low, so the autoscaling sets it to 0 - 14.2 (or whatever). Well, I don't really care about the volts at startup. So, I set it to 10 - 15. Makes for a prettier graph.