RE: Thunder Tiger Pro12 engine issues
It did run pretty well from what I can remember, but i dont think it was made to be an on-road engine, maybe for a small plane. It was really old, and it's lost all compression (Thunder Tiger .10 Magnum it was) I would just get a new engine, as it would be new, it would run better and is made for on-road cars. Changing the carb might be hard to do, so getting a new engine would be my way to go. I would modify it, but its soo crappy that it wouldnt be worth it, and this is doing it myself.