me and a few of my z31 buddies use it. i`m running 20 psi on a 9:1 compression motor with meth injection and FMIC. you can definatly tell the difference.
check here http://www.zrelated.com/alcohol.htm and here http://www.zrelated.com/alcohol2.htm he also did some temp comparisons with and without but don`t see them on the site. but basicly brought intake charge temp after the tb to around ambiant temp or below in some conditions. for around $100, it`s the best bang for you buck