Hey, I'm trying to make a racing game that will run completely within a browser. It will be similar to BATracer, except that rather than using carsets - a model employed by games such as TOCA, NASCAR and V8 Supercars - I will follow the model employed by Gran Turismo, where you buy a car, improve it, race it and get glory. While I know that > realism = < fun, but I'd like for a true play-by-play of races, like BATracer already is. To do that, I'd like to understand how cars work so I can truly simulate the cars. I've got the gearbox worked out, what I need to know is how various "variables" such as bore and stroke, the weight of the car and the weight of the engine can make an impact on how much engine rotation is sent to the gearbox. Hope I haven't left anything out, and thanks in advance.