I would be interested in the excel file. What you have there looks very close to the data in the graph for the timing on this page.
http://home.comcast.net/~russelc/dme/dmetune.htm
Scroll about 1/3 the way down and you will see what I mean. Quoting form the page above
Quote:
Most of the page is self-explanatory. Offsets are displayed in decimal, and max RPM at the top. The most important issue is how to interpret the data your seeing. The numbers you’re seeing in the maps are trim values as compared to the value 127. So you take a value in a map, say 127. This value is divided by 127 to equal 1.0. This lambda trim value 1. So the IDC is multiplied by 1 and is unchanged. If the map value is 141, 141/127=1.1. This means the value of trim is +10%. Thus increasing the IDC by 10%. If the value is 115, 115/127=0.90. This means the IDC is multiplied by 90% or reduced by 10%. Luckily the software does the calculation for you using the “Interpret Byte Value”. Selecting this box show the value as the multiplier that the IDC would get in decimal format i.e. 1.10 is equal to 10% higher value. When you make changes in the maps, use the “Commit” buttons to change the value permanently in the software. To be complete, increasing IDC (injector duty cycle) will deliver more fuel; decreasing IDC will decrease fuel flow.
The next screen in the tab menu is the timing maps; equal to the fuel maps, and used the same. The interpret button changes the values from decimal to the actual degrees of advance, very easy.
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Here is the graph form the page noted above.
Does this help jog your memory?