Updated 05/02/2003 6:30 AM
I can't think of any setup that's suiteble for a Stage 4 Turbo Kit right now, have you already looked trough the Castrol Tom's Supra setups here? If you haven't, you should try, i think you'll find what you're searching. ChevyCorvette and Fumes are 2 exellent tuners, you sould definately look at their setups, i you want a good one. I'm not sure about ChevyCorvette, but, i'm almost completely sure Fumes has a Castrol Tom's Supra setup posted here. Maybe that one suits your wishes? You can also try mine (equipped with a Stage 4 Turbo Kit of course!).
I'm not sure if it's the Castrol Tom's Supra GT but, a racing Supra can be won at the All Star Championship or, at the Japanese Gran Tourismo Championship (i'm not quite sure how the one i named last is called, but, it's something like that, it's the one next to the All Star Championship.). I hope i've been helpfull to you,