Tapatalk is being removed immediately. There are security issues and there is no justification for having it anymore. I apolgize to those die-hard Tapatalk users but you'll need to start using the forums mobile version instead.
The pump rotors for the scavenge are from a BMW M10 engine, the rotor for the pressure there are two types, one is 22mm which is from a normal BMW M30 engine, the wider one that you have does not exist on any series BMW so far as I know. Hope that helps......alex.