more horsepower with a turbo is great, but you still need to work on other things, like weight reduction, suspension, and anything else to help your acceleration without adding horsepower. you can still have a pretty fast car. if your goal is 300hp, remember traction too. it's hard to keep traction in a FWD car if you have ALOT of power goin to the wheels. cams, cam gears, valves and retainers, bore and stroke, port and polish, lightened flywheel, higher or lower compression pistons (like snoopy said, depends whether you want to go turbo or NA), fuel injectors, and a high flow fuel rail would be a good start. but remember, you can make an engine as powerful as you want, just make sure you have enough sufficient air flowing thru the beast!