If you are intending to use any self learn function of any tuner, you will require the afr sensors, if not the ecm does not have any feedback data to self learn from. Using a better widw band sensor for initial set up and then the use of self tune or closed loop with thw std narrow band sensors is the accepted way of tuning any efi combustion engine.
Hope that helps- Ant
Oz, you have that a little sideways. You do need the o2's for the ecm to learn. It's the voltage from the o2's that let's the AFV's learn. On an open loop bike you will tune to 13 or 13.5 to calibrate the ve tables and then reset your afr table to the values you want. The reason to set the afr tables to one value is it lets you calibrate to a straight line when looking at your afr sample. Hopefully the tuner knows not to leave them there.
If we really want to be accurate the actual AFR will depend directly on load, rpm, cylinder pressure, charge and engine temperature. Using a combination of torque output vs acceleration rate there are also other considerations that must be made before you can even contemplate a predetermined AFR.
Once you have made an educated (experienced guess) as to where you would like your afr to be optimal, you must then use a series of professional equipment to establish any change in engine frequency from uncontrolled combustion and let the engine tell you where it wants to be. That is of course once consideration is given to the level of octane that is available in your fuel and the intended use and barometric pressure range you intend to run your bike at. Once all of that is perfect you can simply turn your closed loop function on and you are done!!!
Or if you really dont understand any of that you can also just tune it to run 13.???:1
Regards- Anthony Rodrigues
just trying to help again
I'm brand new to tuning bikes....so still looking for a good tuning package.
I tune my supercharged chev with EFILive and Tunercats....so have 'some' experience with VE tables, etc...