I have an '84 Spider which I've owned since '87. Current mileage is about 66k. It's always run great. Idles smoothly. Maintenance this year included rotor, cap, wires, plugs, replaced fuel filters, checked in tank pump. Replaced all air/vacuum hoses. Fuel pressure is about 37 as I recall, vacuum about 17 at idle. Ever since I've owned it the car accelerates smoothly to about 2700 rpm then climbs rapidly after that with noticeable increase in torque. As a result I always choose my gear to try to keep rpms above that point. I always assumed I was hitting a peak in the torque curve but I wanted to know if that was normal behavior, and if not, what possible causes could be. I did notice that after all my maintenance this year the acceleration seemed to be more linear for a little while, but it has since gone back to the 2700 rpm jump and that made me wonder.