quickstang_1994 said:
Sorry its hard to explain but a powerdyne does not flow as good. for ex a stock mustang with a vortech w/ 8psi= 315hp with a powerdyne it would take 10psi to equal 315.
I think I might know where quickstang was headed with this...
Although it's not exactly correct to say that a Vortech will make the same power at less boost, the Vortech will make it more efficiently.
One of the primary considerations that people should take into account when purchasing a compressor (be it turbo or blower) is the adiabatic efficiency of that compressor at a given pressure ratio. (boost pressure) Adiabatic efficiency is the ability of that compressor to pressurize incoming air while adding the least amount of heat to it as possible. Different compressors have different efficiency levels depending on how much air volume they are being asked to move (measured in cfm) and at what pressure ratio. (boost pressure)
While a powerdyne may be able to flow 800 cfm if you spin it hard enough, a Vortech YSi Trim will flow 800 cfm without breaking a sweat. Thusly, the Vortech will be much more efficient at pressurizing that volume of airflow without adding power-robbing heat to it. There's a lot more to this, but I don't feel like typing anymore.
I hope that gives you some basis of understanding.
Paul.