[DW SD]

Yeah....thank you for the additional informatoin.

As I was alluding to in my original question, I could see where proper control of different turbos and their varying boost maps would be very challenging to manage, especially with safety and reliability as requirements.

What is more practical for one - off custom turbo applications (either DIY or small shops): variable vane turbos or sequential? They seem like similar means to solving the problem of minimizing lag.

OR are these technologies going to remain in the hands of OEMs for a long time come?

Doug