Quote:

HV oil pumps tend to make better pressure @ low RPM with hot oil, the rotor of a HV pump is larger,



Correct

Quote:

Hi volume pumps also remove heat faster than a standard pump at the cost of consuming more HP to drive them. On a tight new engine a standard pump works fine, On a loose engine or a larger engine the Hi volume works best, providing the pan has the capasity for the flow.



Incorrect, except maybe at lower rpm and pressure when it does not matter. Once your into the relief spring, there is no more oil passing along key engine components. And in fact, the Hv pump is actually putting more heat into the oil when it is beating it around in a circle.