"weight doesent have jack all to do with top speed" WHAT?? Weight has everything to do with top speed. Which goes faster, a Mercedes Benz G55 AMG Kompressor or a Lotus Elise? The Lotus does 0-60 in 4.9sec, compared with the G55 time of 5.5sec. The G55 tops out at 130mph, while the Lotus keeps going to 150mph. The Lotus weighs 1892lbs, while having only 189hp and 133lb-ft tq. The G55 weighs 5900lb, has 469hp and 516lb-ft tq. Weight has everything to do with top speed. Reinforcements are added for stabilizing the car at high speeds, but do you think they make them out of lead? Race cars are built to be light, aluminum engines and components, carbon fiber bodies. They dont build a race car with solid steel bodies, cast iron engine blocks and bore them to 7L, they weigh practically nothing, have 4 bangers putting out under 200hp and speed past 200mph. Think before you speak?