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Old 11-25-2012, 07:54 PM   #309
roger 04 rt
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Joined: Nov 2011
Location: Massachusetts
Oddometer: 2,151
Thanks for the displays they're interesting and different than the 1150RT as you can see in the graphs. It looks to me though like your load axis is mis-labeled. What you've labeled 13 is high load and what you've labeled 100 is actually low load. So if you left the table alone but inverted the labeling on the load axis it would look pretty good. In other words I believe your top row of data is high load and the bottom row is low load. Rpm looks correct.

Here is the general shape of these (generic data below):
In general:

Low MAP (low engine load) = more spark advance
High MAP (high engine load) = less spark advance
Low RPM = less spark advance
High RPM = more spark advance
The spark advance table is a 12 by 12 matrix (144 values) based on engine RPM and MAP sensor values. A further table of 10 values is used to make adjustments for engine coolant temperature.

Example Spark Advance Table

[ign_table(rpm,kpa)]

130kPa 0.0 2.0 6.0 10.0 14.0 18.0 22.0 26.0 30.0 31.0 32.0 32.0
120 0.0 3.0 7.0 11.0 15.0 19.0 23.0 27.0 31.0 32.0 33.0 33.0
110 0.0 4.0 8.0 12.0 16.0 20.0 24.0 28.0 32.0 33.0 34.0 34.0
100 0.0 6.0 10.0 14.0 18.0 22.0 26.0 30.0 36.0 36.0 36.0 36.0
90 0.0 8.0 11.0 15.0 19.0 23.0 30.0 33.0 35.0 36.0 36.0 36.0
80 2.0 8.0 12.0 16.0 20.0 24.0 30.0 34.0 35.0 36.0 36.0 36.0
70 4.0 8.0 12.0 16.0 20.0 24.0 30.0 34.0 35.0 36.0 36.0 36.0
60 6.0 10.0 14.0 18.0 22.0 26.0 31.0 34.0 35.0 36.0 36.0 36.0
50 8.0 12.0 16.0 20.0 24.0 28.0 32.0 35.0 36.0 36.0 36.0 36.0
40 8.0 14.0 18.0 22.0 26.0 30.0 34.0 36.0 38.0 38.0 39.0 40.0
30 8.0 16.0 19.0 23.0 27.0 31.0 34.0 37.0 39.0 40.0 41.0 42.0
20 8.0 16.0 20.0 24.0 28.0 32.0 34.0 38.0 41.0 44.0 46.0 46.0
........500 750 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 RPM
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