Turbine pump ... To make it a good air pump it needs to have a lot bigger wheel and vanes. The problem is then its a really bad liquid pump since the load on the motor is very high when liquid hits the blades.

The roller / vane type pump is a positive displacement pump. While it wont move a lot of air, it will still pull a decent vacuum.

Last edited by Kevin C; 11/08/11 03:11 PM.
87 Turbo Intercooled Raider, roller cam, torsen rear diff, LSD front diff, lockup auto with modified converter, V6 brakes, low transfer case gears...