CV6MTX,
twin turbo is NEVER better? wow that is an awfully broad statement. It really all depends on the particular application and the efficiency maps of the turbo units being considered, and the desired performance from the setup.
You are right that "lag" from a single turbo is not always as bad as many believe that it would be, but the boost threshold is often higher on a single than a twin, making power delivery even less linear, and therefore, less street friendly.
I just think you have made far too broad of a statement for it to be valid; the particular application, and hardware considered is key to the characteristics of a system.
oh, one question, in a generic situation, why would a twin have to run a higher boost pressure to make the same power as a single? the power of an engine is only determined by the amount of air and fuel combusted (and how efficiently, but that isn't a concern here) minus the parasitic losses through the drivetrain, and since the turbos are driven through the latent heat and pressure in the exhaust flow, which would be wasted through the exhaust anyway, what makes a twin have to run at a higher psi? there is no reason excepting that the twins would have to be horribly undersized, and running in a system with far too many parasitic losses.
I'm really not trying to be argumentative
I just love discussing this stuff
