Originally Posted By Bad340fish
Some EFI systems can do per cylinder air fuel corrections when running 8 02 sensors.

This is an interesting video, watch the Trims as the RPM comes up, they are all over the place until the RPMs get up. In those trims 100% is no correction.

Now after going through all that how much power is it worth?

https://youtu.be/6kQGp-fHuFc


If you are running EFI with sequential port injection and coil on plug or near plug ignition, OEM and I'm sure a lot of aftermarket ECMs can give you that data already with one sensor in each bank.

The computers are fast enough now that it can tell which exhaust gas pulse belongs to which cylinder.

Kevin