Still trying to get my head around the 1.6L SC v the 2.3L SC, their internal gearing, mesh and subsequently their various rotor rpm.

You can tell by the many fotos on the web that the 2.3L has an internal gearing system which apparently takes your pulley ratio
2:1? and cranks at least one of the rotors up to a reported 23,000rpm. (If anyone knows the stock ratio for an SL55 - much appreciated)
I can only guess that if one has 3 lobes but the other has 5 "concaves"- I'm guessing they spin at different speeds - the 5Xconcave rotor would spin at 3/5ths of the speed of the 3 lober.
But still cant get my head around (visualise) these two spinning at different rpm....- I guess other gears do.....oh wise ones please chime in.

This also applies to the little brother - the 1.6L SC
Now the 1.6L SC has some form of gearing (difficult to find exploded view photos of the 1.6L) but in this case I believe (at least) one rotor spins at SC pulley speed (direct drive?) and I guess the other one spins at 5/3 or 3/5 that rpm.

thoughts?....