Ephedrine is anti-catabolic so it wont really hinder gains.
For fat loss, Were talking a 5% metabolic increase at best.
I like EC as a preworkout boost to be honest. Its versatile....You can burn more cals OR build more muscle. Motor activity increases, you move more, you burn more cals. OR you can build more muscle because your andrenaline will increase, enabling you to push your mental blocks, break PR's and/or do more sets.
Pales in comparison to albuterol for fat loss. More of a stim to push you through a tough workout on a cal deficit.
keep an eye on BP though.