Originally Posted by
Epstein
About reverse engineering, Hi, I reverse engineered the S13SR ECU injector settings in the source code. The stock ECU mainly injects fuel based on MAF sensor flow, plus fuel map corrections, plus short and long term fuel trim. Everyone knows that part. On top of that, there are 2 settings for injector lag time: a lag scalar and a voltage compensation. Additionally, there is a minimum injection time setting that most tuners trip over. That's it, apart from the numerous warmup fueling routines. Basically how a standalone does it. Not trying to be a dick about this at all, but we're not still stuck in 2002 on the ROM tuning front.
No offense taken. So if you have reverse engineered all of that, why haven't you written any custom code / features into the stock ecu? Even if you got the fuel compensation routines in check, people dont cleanly convert from 1 injector to another. Those settings you mentioned are nice, but broad band aids at best. Can you plop 740's into a stock ka, and make it run just like stock without dyno tuning / afr tuning?