Jon [in CT] wrote:You probably know that your A4SG900C CalID is the base (i.e. oldest) ROM for the 2002 WRX. According to
http://forums.openecu.org/download.php?id=214, the ROM with CalID A4SGD10C was created to fix a "Pinging at high rpm (6000)" problem with the 2002 US WRX.
Indeed. I never got the upgraded CalID on my car (I was out of warranty long before new calibrations were being offered. I've been considering reflashing to one of the more recent CalIDs and using that as a base for my tuning, but after finding the reduced resolution, I've decided against it.
Jon [in CT] wrote:Somewhere along the line, someone decided to simplify some maps by removing cells that were unreachable due to their high load or rpm indices. It is bizarre, though, that the ignition correction map's dimensions don't match those of the main ignition map.
Perhaps... the extra 4.27 g/cyl column is very useful, however, if you're running any kind of increased boost... I'm seeing loads as high as 4.7 g/cyl on cold, dry nights. The high RPM indices are certainly understandable, but if you rescale the map to use a lower max RPM, it leaves you a lot of extra rows that you can utilize in the turbo spool time to optimize driveability.
I certainly agree with you on how odd it is that the dimensions don't match. It really threw me for a loop.
/Andrew