Race car or street car?

If I had to choose between the two then turbo.

Street car - Intercooled twin screw like a whipple or kenne bell. They make lots of grunt down low and plenty in mid range. Not as much on the top end as a turbo but for a turbo to make more power on the top end you sacrifice lots at the bottom so its better for street/strip cars with an emphasis on the strip or all out race cars.

Race car - Turbo all the way. Maybe with a shot of nitrous off the line for getting the car motivated.