Are you guys using bypass filter elements or full flow filter elements in your bypass filter setups?
I ask for two reasons:
One is a bypass filter is a finer filter and does an excellent job on the little oil it does receive at a time. Likewise a full flow filter only does an OK job so as not to cause to much of a restriction.
Secondly if you use any type of filter (in a bypass filter system) and have no restriction in the system there is a chance you're starving the engine for oil pressure/flow because to much is dumped back into the sump by way of the filter.
A bypass filter system is a fancy oil leak.
Typically a bypass filter has a restricted fitting in the system or sometimes in the filter, or it may be the filter. (wherever it is you need to know what's going on) This fitting meters oil to or from the filter and is a compromise of how much oil can be filtered without harming the engine by depriving it of oil.
For example my Detroit manual specifies that a single orifice of 0.062" max should be used in the return line from any or all bypass filters on the engine.
This info is what you need to know for a stovebolt, if it was ever printed. And if not perhaps the restriction in a factory cannister can be measured and duplicated.
Grigg
