Originally Posted by nthfinity
The main thing is turbo lag on a road course. Race cars have anti lag systems, but a street car doesn't. even on low boost with awesome heat dispersion.
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I think heat and lack of progressive powerband are bigger issues than turbo lag. It's to do with how you set up the turbos - do you go for max power (i.e. makes the power at top end - like the F40) or max flexibility (like my S4 and the RT12). The latter hardly have much lag to talk about.
In my car, the power comes on at 1950 rpm so there isn't that much a lag so to speak. Yes, you can be caught flatfooted when you are in low rpms and high gear but you will have the same issue in a NA car which is out of its powerband.