nope, the bottle itself is only 30/70. with the heet (99.9% alcohol) it makes it a little higher.
i run methanol. it is similar to alcohol, but has slightly different properties. they are basically two different types of alcohols. the difference would be minimal, but methanol is slightly better. i run a half gallon tank.
as far as the tune, it depends on how you are tuning your car. if youre tuning it so that without the meth your car is uber lean and your running close to 12:1 AFR with the meth on, then yes youll always need to be spraying it. if you run it safer like i do and dont run so lean without the meth, then you can run out without knocking a ton. also, i have a progressive controller for it. a lot of people that are cheap just run a basic on/off system that once you get into boost it sprays 100% max pressure. the setup i have from devils own allows you to make a ramp of spray. i usually start spraying at about 6-7 pounds of boost and then i hit maximum pressure at about 10 pounds of boost.
