|
|
|
|
|
|
Pressure vs
volume |
| Pressure is created by the resistance to
flow. For example, the water flowing out of a garden hose has relative
low pressure, but when you put your finger over the end of the hose,
restricting that flow, the pressure within the hose increases and you
see the result by increasing the distance the water travels as it
leaves the hose. The resistance to oil flow Inside an engine is
from the clearances of the bearing and lifter bore. Engines with
increased clearances will require greater flow to maintain the same
pressure. As the RPM of the engine increases more oil is required.
The oil pump selected should be able to flow the volume of oil
required to maintain the pressure desired. A relief spring within
the pump relieves the pressure when it reaches the desired level.
High pressure pumps have a higher pressure relief spring as also
do most high volume pumps. The main disadvantage of using a pump
with the ability to flow more than required by the engine resulting
in this bypass opening is a very small loss of horsepower. |
|
|
Canton's pressure
balanced oil pumps: |
 |
 |
|
Canton’s pressure balanced oil pumps are
new pumps that have been modified to provide a smooth continuous flow of oil
through the full RPM range. By reworking the pump housing and providing
feeder grooves, we bled some of that high pressure back into the gears
providing smoother operation and more constant pressure. This allows for
the high RPM operation on a race engine and limits oil pump cavitation.
Since they are designed for smooth operation at high RPM's, the idling
oil pressure can be up to 10 lbs lower than that of a standard oil pump.
#21-500 SBC Standard vol. Pressure Balanced oil pump.
#21-540 SBC High vol. Pressure Balanced oil pump.
#21-560 SBC High vol. 3/4" inlet Pressure Balanced pump.
#21-640 BBC High vol. Pressure Balanced oil pump. |
|
|
