I have some friends who preloaded on Piracetam only on the day before the roll. I was taking for seven days before that. They largely agreed with me regarding its effects when combined with MDMA, although I must say it was more pronounced for me.
I gave them about 3g something like 3-4 hours before we dropped the rolls. Take 4g for good measure. Piracetam is safe and there have been studies where older drivers where give something like 5-6g every day for months without bad side effects. I don't have a link to the studies, so you're going to have to take my word for it or do you're own research.