You are correct that most vortechs need pressurized oiling but not all. The v3 is self contained. Only good for around 800hp though. I'm personally a vortech supporter, can usually find them cheaper, it's for a Mopar so, you gotta make a bracket unless you have a gen3. They also seem to take a beating better, honestly seems like you can cog them when vortech says not to, spin them harder than recommended and still keep going. The NMRA is a fun place to explore vortechs abilities. Definitely pros and cons tho, same as turbos and nitrous really. It's all work and money, personally feel all power adders cost the same once you hit the track