dobro
Supercharged
Today I talked with a technical assistance gentleman at Dynojet about Autotune. This is what he told me was the main benefit of Autotune: The EPA restricts the reading range of O2 sensors in the exhausts on stock motorcycles. For example, Harley's O2 sensors (and he assumes Rockets are the same) can only read AFR's between 14.3:1 and 15.2: 1. Any system relying on input from such a restricted O2 sensor will never know if the actual AFR being produced is outside those parameters so it obviously cannot correct to an AFR outside those parameters. For example, if you want an AFR of 12.8:1 at 3,000 rpm's and your system is using an EPA restricted O2 sensor your system will never be able to detect AFR's below 14.3 so it cannot correct your actual AFR to 12.8. Autotune includes an O2 sensor that is not EPA restricted and it can read AFR's in the exhaust from 10.0 to 18.0, so it can detect actual AFR's below 14.3:1 and thereby enable your bike to correct its AFR to 12.8. He also told me that Tunecu employs the stock O2 sensor so it, like stock bikes, is "blind" to anything below 14.3:1.
Don't raise hell with me over this. I am just conveying what the man told me.
Don't raise hell with me over this. I am just conveying what the man told me.