I wouldnt say its a waste of time,you can add it as safety to run more boost, but you wont make more hp at the same psi with or without. so if at 15psi your making 300hp, with meth you wont make much more (unless you were detonating before you might even make a little less depending) without adding timing. but now you probably can run 22-25psi on pump gas (which you couldnt do before).