Originally Posted by lukeskywrx
Electrons do not work that way!
The O2 sensors lag slightly depending on position because it takes a little bit for the exhaust gasses to move. The crank trigger has to be extremely precise to deliver fuel and spark on time and that is where RPM comes from. The data to romraider is just a snapshot taken of the values several times per second.
The tach is just an approximation for the driver to use, DO NOT trust it over the values you are programming into the ECU.
Would you trust the values RR provide you then? or just program her back to 7k and be done with it, I think I'm too paranoid