It will increase the amount of THC... if the weed were indica, it will become somewhat sativa-like (as the effects of indica ones are caused mainly by CBD, which is partially transformed to THC), more mental, and less couchlock, and if the weed were sativa, it will become stronger. If the weed were already cured or dry, the increase of potency can be low (as all the THCA already was transformed to THC).
Anyway, its always worth the try, cause the increase sometimes is great :stoned: