Steve Barnes
Well Known Member
I have about 5 hours on my new K&P oil filter. My oil pressure is running about 5 + psi higher than with Tempest/Champion. Anyone else have this happening? Comments welcome.
Steve
Steve
I have about 5 hours on my new K&P oil filter. My oil pressure is running about 5 + psi higher than with Tempest/Champion. Anyone else have this happening? Comments welcome.
Steve
My oil pressure did not change, but I did notice on cold start-up it takes a second or two longer for oil pressure to show. I have a 90* adapter with the oil filter pointing up and it seems these filters will drain back much easier than standard filters.
I am installing one of these filters on my IO-360 and am wondering if most are putting the nipple into the engine and screwing the filter on or putting the nipple into the filter first. I was thinking a little red thread locker on one end also. My nipple came out of a Tempest oil filter and one threaded end is shorter than the other. On the Tempest filter the short end was in the filter. Is this how it should be installed?
Thanks
The filter can't change the oil pressure (unless it's leaking) because it it installed before the the presser sensor.
You'll have to explain that one. The oil pump is a positive displacement pump; so, the system pressure is controlled by a relief valve. These usually incorporate coil springs whose force changes over its compressed length (as opposite to bevel springs which give a much more linear response). If that force changes, the opposing force (oil pressure) will move. Short summary, a change in system backpressure can easily cause the pressure relief valve to operate at a different position/not regulate at exactly the same pressure point.
Is there a problem? Probably not. If the oil system pressure remains in range, I'd monitor it until the next oil change; then, give the filter element inspection the proper attention.
The filter is upstream of the regulator, so while it may increase volume due to being freer flowing, it shouldn't change the regulators behavior in a significant way, as the volume change is also not significant. However, if at the lower end of the regulators regulating range, I would expect the user to see an increase in pressure due to the extra flow. Down here the regulator is allowing very little bleed off, so any improvements in flow directly translate to higher pressure. Up higher in the range, the greater volume just translates to greater regulator bypass and a similar ultimate pressure.
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I am installing one of these filters on my IO-360 and am wondering if most are putting the nipple into the engine and screwing the filter on or putting the nipple into the filter first. I was thinking a little red thread locker on one end also. My nipple came out of a Tempest oil filter and one threaded end is shorter than the other. On the Tempest filter the short end was in the filter. Is this how it should be installed? Thanks
Always good to hear from Mr. Ruth. His statements are always backed with his reasoning. That said, not sure we're following each other. If you change the system losses, the effects will cascade. Relief valves (especially the one applied here) aren't linear devices. If the valve upstream or relief side conditions change, its characteristic will change. If the OP goes back to his original filter type, I'd expect his oil pressure to follow. Either way, nothing sounds like he has an issue based on his single data point.
Sounds like somebodies feelings are hurt.
Simplified, the PRV is a force balance device. Anything that affects any three of these balancing forces will change the valve position. They aren’t designed to have a very precise control. In an application like this, first suspect would be internal valve leakage.
These aren’t complex devices but their designed operating range is pretty narrow.