"Charlie Spitzer" wrote in message
...

that top speed is limited to: what the driver can do with installed tires
on
some specific track, aerodynamic forces relating to the frontal area and
drag of the body, size of the engine installed, size of cojones of the
driver, or other factors. it almost isn't ever a speed limiter on the
engine.

That too. But Mercedes and BMW and my 97 Chev PU have governed top
speeds. This is done through RPM restrictions in top gear in particular.
My 97 and my friends 96 ChevPU would only go strongly to about 95 mph and
then stall out until the vehicle speed reached about 90. Change out the
PROM and that limit can be defeated.