I'm no expert, but I think the difference is per what EvilTwin mentioned, for ECU reflash, it's a one time setting and the variables are approximated, if you need a re-tune later on, then they will need to re-flash the ECU again. That's where the fuel management controller comes into play, being able to be adjusted, some have auto-tune modules, and even multiple fuel map storage which can be loaded/activated.
If I'm mistaken my apologies.
yes i you want to re-tune you have to reflash .. but its the same thing ..
if you want to re-tune your fuel controller you will have to get dyno tuned again if you do any change.. so its the same thing .. unless to whom you are getting your bike tuned charges you the flash extra and more..
or unless you are trying to do changes by yourself
You're right, everything you can do with a Z-FI (except TC) you can do in a race ecu, plus a few options. The only draw back is that often times race ECUs aren't as easy to tune with. For example stock O2 sensors are narrow band not wide band, so they can't be used to gather AFR data with which to build or modify a map. So you can manually adjust fueling on a race ECU, but you don't have an option for running an auto tuner like add on.
Z-Fi's are much easier to use than a race ecu, if slightly more limited in their adjustment capabilities.
okay i get it now ... the auto tune does great job but sometimes like you posted in other thread if im correct the autotune changes the map a lot from how it was originally tuned and its not good..thats why bazzaz lets you apply the changes of the z afm unlike pcv autotune..
so my last Question based on your answer to my post is this ..is the autotune so important? and does so much difference to make someone choose an addition fuel system over a race ecu or flasehd ?