1/8 and 1/4 miles tracks - which is why I've never been faster than 110 mph in my car before.
sorry i was gonna stay out of this but........
if you have never been more than 110 in your car, then how would you know that it isn't limited. there is a rev limiter in the mazdaspeed protege. a rev limiter keeps the motor from spinning too fast and coming from together. example, put it in first gear, let off the clutch and put your foot in the floor. when the tach goes to bouncing at 7000-7300 rpm, thats a rev limiter. if you get to fifth and hit a rev limiter, damn. you will be going
as math has proven 160ish. what really happens is that the motor is pulling a bunch of air, the turbo gets really hot and starts losing efficiency. the fuel system attempts to compensate and cant. the maf tells the computer that the car isnt getting enough air and that the motor is in danger, so you get a fuel cut. more efficient air delivery (or a colder day) will help with the fuel cut. if you really want to know what is going on with the car, get a pyrometer, a boost gauge, and an air fuel gauge. this will tell you a bunch about the car.
my story. i stretched my car out when it was 92 degrees. when i hit 130, the pyro was at 16 and climbing. as i stayed in it, boost slowly went from 7 to 3. at 146 according to gps, the car shut down and i let it. i slowly dropped back to 65 or so. i ran it again a month later and it was 67 degrees. the turbo heated up about the same, but the boost only dropped about 2 pounds this time instead of 4 and i got to 148.
bethat said, i will never go that damn fast in that car again. it will do it, but its a little tall and a little narrow to go that fast. i will stick to less than 120......