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With the ball bearing turbos that are available now that are able to spool up from low rpms (eg 2500-3000rpm). In good turbocharged cars there is virtually no lag, trying to stick a monster size turbo on a small engine will create lag.
The comptech and vortech supercharger kits that are avaible for the 2000 at the moment are centrifugal superchargers and give a linear boost level that is directly related to the engine rpm (eg boost goes up as revs go up).
Using these superchargers you will not be getting a real lot of boost at low rpms.
Anything is usually possible if you have enough money. Essentially the difficulty is designing the system to get the supercharger and turbo to work together and cut-in/out. It would be easiest to copy the design of similar systems such as the MR2 twincharger.
I have not heard much about the idea, but the one application I saw needed what was essentially a gate to switch between the two.
When the turbo is not providing as much boost as the supercharger, the gate would close off the turbo side. When the supercharger was providing less boost, it would close off the supercharger side.
I think with the advancements in turbocharger designs over the last few years, it would be a lot easier to get the same results by using a small ball-bearing turbocharger.
M@
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