Originally Posted by tunaglove
Since our stock SC is losing efficiency at 20psi has any one thought of or tried reducing the SC rpms and supplimenting boost with a rear mount turbo to bring back 20 psi but with less parasitic drag to the crank??? Google "compound boost". Looks like it's working for lots o folks!
I believe the technical term is "twincharging", and no-I do not believe anyone has done it.
Twincharging is a bulky, heavy, and generally overly complicated method. A larger turbo alone can usually exceed the performance of any twincharging setup.