| I can't say they are my cup of tes as they operate on using the trim map inside the ECU associated with that sensor so has limitations, I would always prefer something that alters the length of the pulse to the injector as Power Commanders do.
These days i'll happily edit the map in the ECU after first saving a copy of the original but I understand that isn't for everyone with many prefering the Power Commander route, but there are alternatives that do a similar job to the power commander of either shorterning or lengthening the time of the injection pulse.
Back in the infancy of Power Commanders there were alternatives such as DB Tronics or Techlusion that allowed you to change the fueling with the use of a screwdriver to alter the pulse length
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