Originally Posted by CBR.worm
Surely, these engines have an oil pressure bypass regulator that dumps excess pressure back into the pan before it gets to the filter? If so, worst case, they will be limiting oil flow to the critical engine parts when cold and possibly extreme rpm conditions. If they didn't, they could do significant damage to everything from the pump drive to the oiling circuits, even with the filter bypass in place.
All positive displacement oil pumps will have a pressure relief valve. But by the time the pump hit's pressure relief, the filter will be getting way more delta-p across the media than it would if the filter had a proper bypass valve. The delta-p across a bypass-less filter would be worse if the engine was revved pretty high with cold oil. It would certainly pose a risk to center tube implosion/crushing and/or media damage/tearing. Running with no filter bypass valve can become a risky situation.
Originally Posted by CBR.worm
Clean oil is great, but the truth is, oiling systems can tolerate tiny particulate matter. It's not ideal, but the few particles suspended in oil that has already run through the filter thousands of times is probably better than low flow under those conditions. I am all for clean oil, but I would prefer to have proper flow ...
Full synthetic, high efficiency filters can flow way more than any stock street engine could put out, and still have only around 3~4 PSI of delta-p across them with hot oil. The engine will get the same flow rate vs engine RPM regardless of what oil filter is mounted as long as the pump doesn't hit pressure relief. The pump is most likely to hit pressure relief if the oil is cold and the engine is revved pretty high ... that's why engines should always be driven mellow until the oil warms up, regardless of what oil filter is being used.
Surely, these engines have an oil pressure bypass regulator that dumps excess pressure back into the pan before it gets to the filter? If so, worst case, they will be limiting oil flow to the critical engine parts when cold and possibly extreme rpm conditions. If they didn't, they could do significant damage to everything from the pump drive to the oiling circuits, even with the filter bypass in place.
All positive displacement oil pumps will have a pressure relief valve. But by the time the pump hit's pressure relief, the filter will be getting way more delta-p across the media than it would if the filter had a proper bypass valve. The delta-p across a bypass-less filter would be worse if the engine was revved pretty high with cold oil. It would certainly pose a risk to center tube implosion/crushing and/or media damage/tearing. Running with no filter bypass valve can become a risky situation.
Originally Posted by CBR.worm
Clean oil is great, but the truth is, oiling systems can tolerate tiny particulate matter. It's not ideal, but the few particles suspended in oil that has already run through the filter thousands of times is probably better than low flow under those conditions. I am all for clean oil, but I would prefer to have proper flow ...
Full synthetic, high efficiency filters can flow way more than any stock street engine could put out, and still have only around 3~4 PSI of delta-p across them with hot oil. The engine will get the same flow rate vs engine RPM regardless of what oil filter is mounted as long as the pump doesn't hit pressure relief. The pump is most likely to hit pressure relief if the oil is cold and the engine is revved pretty high ... that's why engines should always be driven mellow until the oil warms up, regardless of what oil filter is being used.