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« on: January 07, 2015, 02:15:41 PM »
The maps are a set size. For Wide Open throttle, the maps are 16x1. Meaning there are 16 RPM break points. The way the RPM break points are calculated interlock them so to speak. A method of "Eprom subtract" is used to calculate the real world RPM. If you change one RPM, it will affect EVERY break point below it in the map.
Obviously, you won't find yourself at wide open throttle at only 600 or 800 RPM even being around 1000 RPM would probably never be seen in a WOT condition. So, when you scale the upper RPMs up, you will have to give up RPM resolution somewhere.
This is not negative per say. This simply means you may have to give up refinement in certain regions of the RPM band. Here is an example.
Pretend that normally, you have some break points down low that are 640, 800, 1200, 1600, 2000
Now say you make some changes above those RPMs to reach a higher MAP RPM break point. Those RPMS limits COULD become something like 900, 1400, 2000, 2400, 2900
That is only an example. We can tweak the scaling to that areas that need more resolution, like peak torque, have good resolution and other areas where the ECU can easily extrapolate data between break points and doesn't need 200 or 300 RPM difference in break points to function flawlessly.
There is always an option of moving maps and expanding their size. However, we will not do this typically as it requires a new .ECU file and a bunch more work. We hardly EVER have had to move a map around to gain more size. Simply scaling the RPM limits differently is all you need to do 95% of the time.
