heat at speed

["Richard" <rcsphx@qwest.net>]

Ok guys ....here's another engine temp question.

I have 67 MKII....all stock.   If you are driving in town in stop and go
traffic and the temp gauge stays at around 200.  Why when driven on the open
road at 65 mph and 3000 rpm does the temp rise to over 212?  Then when back in
slower in town driving with the engine at around 2000 rpm the temp starts to
drop back to around 200.

I have always assumed that faster is better for cooling.   Why wouldn't the
increase in air flow thru the radiator at the higher speed compensate for the
increase in engine temp and keep the temp at around 200.  Would this indicate
that the water pump is not pushing enough water thru the system to cool the
engine?

Thanks
Richard