most of that can be answered by using that simple search engine.otherwise known as GOOGLE,
http://en.wikipedia.org/wiki/Mazda_RX-7 brings all the standard facts and features.Another quick search on google reveals that they run 8-10 psi boost and the second turbo kicks in at 4500rpm...0-60mph 5.8 seconds....top speed 155mph.....all that found in 2 mins on google,learn to search man