Who’s built the fastest car? I was wondering because I was trying to build a car that could do 300+ mph, which I think is possible. The fastest I could get was 278 
Who can do better? Surprise me
You might want to look here: viewtopic.php?f=13&t=3087 
KingJanic - its not the first time you did not use the search engine, your brain or the correct subforum. Either the totally senseless spam-thread 'Leader of Pluto or other things that could be done with 1 minute of searching.
See this as a spoken warning.