Oil Pumps - a multitude of styles
With standard bearing clearances and engine temperatures the standard pump will work fine for most application. High volume pumps have taller rotors and will often interfere with the standard passenger car oil pans. Running looser bearings may call for higher volume and pressure.
This illustration came out of an article I *think* from SportsCar but could have been North American Pylon. If I find it I'll provide the proper credit. Take it for what it is - a way to think about how the changes can effect volume. I would not take it literally. A lot will depend on the temperature (becaues it effects viscosity) and the relief spring's pressure.
When the oil is cold a high volume pump is not going to provide any more volume at high rpm than a standard pump. The oil is just going to be too thick.
With standard bearing clearances and engine temperatures the standard pump will work fine for most application. High volume pumps have taller rotors and will often interfere with the standard passenger car oil pans. Running looser bearings may call for higher volume and pressure.
This illustration came out of an article I *think* from SportsCar but could have been North American Pylon. If I find it I'll provide the proper credit. Take it for what it is - a way to think about how the changes can effect volume. I would not take it literally. A lot will depend on the temperature (becaues it effects viscosity) and the relief spring's pressure.
When the oil is cold a high volume pump is not going to provide any more volume at high rpm than a standard pump. The oil is just going to be too thick.