idle 14.7 to 15.1,,,60 to 80 mph 14.4 to 14.7,,,modded engine,,you want, at wot 11.9 to 12.3,, and at wot it depends on where the 02 sensor is located. that is why i said 11.9 to 12.3 with the factory set up, no mods you will at wot read 10.0 to 10.9 the factory makes it rich because so you can't hurt the motor. so if you are in that ball park your ok. really your engine could run 10.0 to 12.3 and you would be safe, this is at ((wide open throttle))=wot. jim