Ive seen some stuff on Twin screw blowers and dont really know much about them. I was wondering what the real difference between the two are. Dont they both use twin impellers?
Roots blowers have straight-cut impellers -- while twin-screws have interlacing helix impellers. The twin screws are a lot smoother under acceleration -- while roots blowers tend to make a thumping noise as the amount of boost fluctuates.toolman said:Ive seen some stuff on Twin screw blowers and dont really know much about them. I was wondering what the real difference between the two are. Dont they both use twin impellers?
I hear ya -- but the difference in impeller design results in a different classification in my mind. With the twin screw, the air delivery is smoother and much cooler. Don't have the time to follow it -- but I think the NHRA banned twin screws in the alcohol classes for a while because they made for such a difference in performance -- and that ban was specifically for the impeller design.big_mike said:BUT, both are twin screw compressors and both rely on gearing to produce their boost.
exactamundo...Steve A said:A "Roots" is an air blower and compresses in the manifold, twin screw compresses the air in the blower itself. Twin Screw is much more efficient and heats the compressed air less.