I have a PT Cruiser (First car obviously) that I have won about 10 races with, but still a ways away from getting a Skyline or anything worth a second car. I am trying the turbo series right now and won the first race, however the second race, the large oval, my car seem to top out at 139 MPH and whenever it hits that mark, it drops back down to 135 MPH and the cars blow right past me. Is there a way to increase the top speed? It seems my RPMs are topped out at 139. Any help?