There is an existing National class that allows turbos. T2 has the Mitsu EVO and the Dodge SRT-4. Both turbo-ed cars. SSC also has the the Mini Cooper-S, a supercharged car. We currently have at least on of each in our shop, (yea, bragging here), including the Run Offs Winning SSC Mini of Pete Taylor.

So, forced induction is currently allowed. Read the GCR, (available online), and see whats out there.

George