Anyone got an answer to this? I cant figure it out.. why would you want the extra momentum any more on a roots type then you would on an NA or turbo application?

 

Maybe this is said because there is already a lot of force slowing the engine down (supercharger) when not on the gas so it would be even worse when you have a lighter flywheel. Perhaps if they were paired together, the revs would drop really fast and make shifting/starting off harder. I don't know for sure but this could be a possibility.