If thats all you did it was broke to start with:shock: but now it's telling youit's broke.does it do it with the clutch pedel on the floor and the car stoped in gear? that would tell you it's the engine,broke valve spring/rocker,bent valve,belt coming apart etc.if not then it's from the trans to the tires. and floging your ride wont hurt it if it's built good.if it's junk it will break. my old street car with a v8 13.8 to1 cr .640 lift roller cam ran 8000+ rpm many times a day every day with only ex valves, bearing& ring change(& gaskets)every 7 years. the only thing that suffers is tires,gas,tickets,wife. if you miss a shift or over rev or abuse it ,then thats another thing all togeather.