Could they have supercharged the engine and flashed it to get more out of it?
No. Japan had a gentleman's agreement between all of the automakers that they were to keep the power output of their flagship sports cars below 276 hp. It might have had something to do with government regulations.
Most of the cars, Toyota Supra, Mazda RX-7, and Nissan Skyline, actually produced more, but the published values were 276.


