Racepak O2 sensor

[Adger Smith]

When you get tired of reading what all the experts say... Go to the track and tune your engine where it is happy.
Best ET and MPH in the conditions available.
Then hook up your gauge and let it tell you what the A/F ratio is.
Your dealing with arbitrary numbers and your engine combination may not be happy with them.
I loved it when I was dyno testing and had customers tell me the EGT and AF had to be certain numbers to make power.
Their engines usually told them something different.
When making power most engines accelerate when slightly rich at peak Tq and run up toward lean at peak HP.
In the car I like slightly rich at the gear change to produce Tq and pull off the gear.