It will need alot more than just 2 PWM outputs..
Will also need an Ems which can:
- Support dual pressure input signals, for both the turbo's
- Dual closed loops control maps to ensure the turbo pressures are the same no matter what the throttle, engine loading and for when the vanes clog up, which they do!
- Then i expect you will have to still fit a external wastegate as exhaust flow will be different to what the turbos are designed for, so thats another closed loop wastegate map.
- Like the Porsche you will have to i expect run Closed loop Lambda control as well with the VTG turbos. To do this properly you will need an Ecu which has fail safes for this also.
Only one ecu i know could do this properly IMO, Solaris