I think i have a good enough understanding of how WMI works and how it benefits my cars performance, but if I install a stage II kit, how is the spray controlled? I heard that the water/meth doesn't do ANYTHING unless you adjust ignition timing. Does this mean I will have to have my car retuned after installing the kit, or is this something that the ecu will handle on its own?

Sorry if this is a nooby question