"I have setups out there running 620 on the boundary at peak and 80 to 90 on the ect table..." - This is an important point. It seems the value referenced here and captured in the tune file is NOT normal engine coolant temperature. Normal engine coolant temperatures for most high performance engines is usually between 185 and 205 degrees at normal operating temperature.
I'm suggesting that the Normal ECT value in the tune file is a "window in time' that accounts for the changes in the combustion process and/or engine efficiency as engine coolant temperature increases. We all can probably agree that most engines run smoother when the have a little heat in them. I'm a Yankee from Boston... I remember my mother trying to start the ole AMC Ambassador station wagon (green with fake wood on the sides) during the winter.
OK... so if this logic is correct...
The values in our SPREADSHEET can all be the same, but the values in the TUNE FILE can be different to account for the variances in engine performance based on ECT
And if that statement is correct, I would expect that values within the circle shown (in the 176, 198, 219 cells) to be similar, if not the same, AND that these values are the ones we would enter into the spreadsheet for injection timing analysis. In other words, we are using the values in the TUNE FILE in the 198 ECT (for example) cell all the way across in the SPREADSHEET file because we're trying to figure out injection timing for maximum engine performance at normal engine operating temperature (which is often around 198 degrees).
Correct?