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I did a log on my car and found that there is sometimes more than 10% difference between bank 1 and 2.
Also at high rpms Bank 1 it is at 13.5 and bank 2 is at 9.5.
At idle bank 1 is -10% and bank 2 at -1.5%
Does that cause any performance problems?
At WOT you want them to be zero. What the above shows is that you're a bit lean. Having said that, two data points isn't enough to make any real decisions.
at idle the split is a bit large but it won't cause performance problems.
I e-mailed you regarding the log files. The format your software exports the data in isn't usable. I sent one of my AutoTap files exported to Excel to show what it needs to look like.