I personally wouldn't turbo charge the engine if you want to keep your throttle response for autocross. I'd look into a supercharger. You can do an LSA blower swap or spend the bigger bucks and get the newer blower. There's also a Magnacharger or Edlebrock kit which uses an Eaton blower. Those will all give you instant torque and throttle response. Good luck whatever you choose.
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Trey
Current ride: 2001 BMW 540iT soon to be manual swapped.
Former rides: 1979 Trans Am WS6: LT1/T56, Kore 3 C5/6 brakes, BMW 18in rims
00 BMW 540i/6: Suspension, wheels, and ACS bits.
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