increase oil pressure with larger filter??

[mingchi96]

Can someone confirm this for me. Just making sure. Thanks

 

[jason07-1zzfe]

Yes it's likely. Assuming increased media area, which will have lower differential pressure...there will be higher pressure after filter (where guage is).

 

[RalphPWood]

I wouldn't think it would make any difference if your relief valve is working. The oil pump has no problem pushing the relief valve open. Some relief valves may be more restrictive than others. With a large filter the relief valve may never open with the correct oil. When I use a Moter Guard submicronic bvpass filter with a PermaCool sandwich adapter I depend on the resistance of the oil going through the adapter relief valve to feed the Motor Guard M-30. The M-30 keeps the full flow filter clean.

Ralph

 

[jason07-1zzfe]

Of course it won't increase maximum pressure. But what about up until then? On my car it most definitely is higher, because the filter is flowing more.
My pump doesn't hit max pressure until well over 3k rpm, probably 4k+. And even at max pressure with a less restrictive filter you will have more flow.

 

[dickwells]

Jason: How is the filter flowing more? Or more to the point, since the oil pump is a positive displacement pump, where does the "lost" oil go when a more "restrictive" filter is in place? I recall that when pumps had their output severely restricted they would shear a pin or shaft. Pictures of filters with the media or end caps blown out of them seem to indicate that the pump will do its job regardless of the restriction. The bypass valve just has to open faster save the filter. Hmm.... on the other hand I was just thinking that in the case of engines which have an internal releaf valve some of the oil would be lost through it and account for an overall lower oil pressure. I am going to have to sleep on this one. Regards, RW

 

[ZR2RANDO]

The oil pump has a pressure relief built-in so it can only generate a certain maximum pressure, from that point on, the pressure drops as the oil goes through each passage/constriction/filter and then finally drains back into the oil pan where it is pumped back up to that original pressure again. The pump generates higher pressure at higher rpm, the relief valve just maintains a certain maximum value, the relief valve bleeds off any excess pressure when the oil is cold/thick or at higher rpm.