vaporizing

does weed stay in ur system for a shorter peroid of time if you only vap?

I doubt that it makes any difference. No matter how injested or what form it goes to the same place. Your fat cells.

Vaporizing definately doesn't affect the amount of thc. If it did, Noone would use them. It simply cuts down on the crap that your getting in the smoke along with the thc. No way to get high from marijuana and expect to have less metabolites in your system.