A 2001 is still an expensive piece, and to points below, after you apply a charger you will be close to the cost of an S8. In my mind, a candidate for a charger would be a high-mileage 97-99 A8 that you can pick up for cheap and that needs overhauled anyway.

IMHO, a charger kit for the 4.2 will come from the application for A6 4.2's, and the engineering of that will be an extension of work on 2.8's and 3.0's in A4's and A6's.

Jim Bragg
Current Autos:
'03 MB CL55 Kompressor Horizon Blue Metallic
'03 Volvo XC70 Ruby Red (wife's car)

Audis of the Past:
'00 Silver Audi A6 4.2
- Lowered stall speed for the pullin' like a freight train effect.
- TozoA8 super ATF
'98 Ming Blue A8 (April 23, 2003 - lease termination, a sad vehicular day in the Bragg household)
'98 Audi 1.8T quattro (Tropic Green)