Have you ever ridden in a vehicle powered by a properly engineered twin-turbo V8? No, a single-turbo V8, or heaven forbid, a single-turbo four cylinder is not the same thing, not even close...
Just like to do a survey here. Since we know for a turbocharged vehicle it is hard to find a compromise in between response and peak power, given that you're doing a turbocharger upgrade, which one do you opt for?
