Why does 1995 econoline 250 keep blowing 15 amp fuse controlling speedo?
Found problem, intermittent short circuit problem in turn signal switch, replaced switch, problem went away.
The top speed of a 1995 z28 depends on the rating of the factory tires. If your speedo reads 240kph your car came with z-rated tires and no speed limiter. If your speedo reads 180kph your car came with lower speed rated tires and a limiter that shuts you down @ 180kph. Mechanically the cars are no different. GM states "for prolonged driving at over 180 kph inflate tires to 35psi".