most valuable engine rebuild part you can buy
Sure. But the iron/steel debris held will work like a barrier for the non-magnetic particles. It is the same principle used on cotton filters - up to a limit, the dustier the better they work.
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From: Grand Island, NE
here are some pics of the most valuable engine rebuild part you can buy. a true full flow filter.
I'd be against running without a bypass. Dirty oil is better than no oil at all.
when the bypass opens oil goes right around the filter. I believe this happens at just 60 psi oil pressure or maybe even lower.
The pressure the oil pump is putting out has nothing to do with the opening of the bypass valve. It is the pressure difference across the filter media. If the media is plugged the bypass opens.
I'd be against running without a bypass. Dirty oil is better than no oil at all.
when the bypass opens oil goes right around the filter. I believe this happens at just 60 psi oil pressure or maybe even lower.
The pressure the oil pump is putting out has nothing to do with the opening of the bypass valve. It is the pressure difference across the filter media. If the media is plugged the bypass opens.
here are some pics of the most valuable engine rebuild part you can buy. a true full flow filter.
I'd be against running without a bypass. Dirty oil is better than no oil at all.
when the bypass opens oil goes right around the filter. I believe this happens at just 60 psi oil pressure or maybe even lower.
The pressure the oil pump is putting out has nothing to do with the opening of the bypass valve. It is the pressure difference across the filter media. If the media is plugged the bypass opens.
I'd be against running without a bypass. Dirty oil is better than no oil at all.
when the bypass opens oil goes right around the filter. I believe this happens at just 60 psi oil pressure or maybe even lower.
The pressure the oil pump is putting out has nothing to do with the opening of the bypass valve. It is the pressure difference across the filter media. If the media is plugged the bypass opens.
I am running the filter full time for a year now on my last build. I check the filter in between oil changes. its not an issue to run it full time from what I have seen so far.
Last edited by 94AWDcoupe; Jun 28, 2015 at 06:42 PM.
The Bypass Valve
Under ideal conditions, the bypass valve will never open. When it opens, the oil by passes the filter and goes on through to the motor, obviously unfiltered. It is a safety valve. However, in real operation, it opens often.
One example is when you start the motor when cold. The oil is thick and does not pass easily through the filtration medium, thus building up to a high pressure drop. So, the bypass valve opens to prevent oil-starvation of the motor. How long it stays open is dependent on how cold the oil is and how long it takes to get near operating temperature. When the pressure drop across the filtration medium drops below the bypass valve setting.
Another example can occur when the motor is fully warmed. At idle, the oil pressure is about 15 to 20 psi, and the pressure drop across the filter is about 1 or 2 psi. You take off towards the redline, and quickly build oil pressure. During that full-throttle acceleration the pressure drop across the filter will exceed the bypass setting, and send unfiltered oil to the motor, until the pressure across the filter has time to equalize. During a drag race, shifting through the gears, the bypass will open several times.
A third example, which you should never experience with frequent oil and filter changes, is when a filter becomes clogged. A spin-on filter can commonly hold 10 to 20 grams of trash before it becomes fully clogged. The bypass valve opening is the only way to keep the motor from becoming oil-starved if the filter becomes clogged.
Under ideal conditions, the bypass valve will never open. When it opens, the oil by passes the filter and goes on through to the motor, obviously unfiltered. It is a safety valve. However, in real operation, it opens often.
One example is when you start the motor when cold. The oil is thick and does not pass easily through the filtration medium, thus building up to a high pressure drop. So, the bypass valve opens to prevent oil-starvation of the motor. How long it stays open is dependent on how cold the oil is and how long it takes to get near operating temperature. When the pressure drop across the filtration medium drops below the bypass valve setting.
Another example can occur when the motor is fully warmed. At idle, the oil pressure is about 15 to 20 psi, and the pressure drop across the filter is about 1 or 2 psi. You take off towards the redline, and quickly build oil pressure. During that full-throttle acceleration the pressure drop across the filter will exceed the bypass setting, and send unfiltered oil to the motor, until the pressure across the filter has time to equalize. During a drag race, shifting through the gears, the bypass will open several times.
A third example, which you should never experience with frequent oil and filter changes, is when a filter becomes clogged. A spin-on filter can commonly hold 10 to 20 grams of trash before it becomes fully clogged. The bypass valve opening is the only way to keep the motor from becoming oil-starved if the filter becomes clogged.
Well that's scary. So the whole your driving at a track event above 4k rpms the oil filter is likely bypassing?
The filter in the first post only filters to 45 microns, that is also scary..
The filter in the first post only filters to 45 microns, that is also scary..
Last edited by letsgetthisdone; Jun 29, 2015 at 03:34 PM.
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From: Grand Island, NE
What I don't see here is any proof: proof that the bypass ever opens or that it is ever closed, or anything in between. I could sit here and type what I imagine is happening inside an oil filter too. What value is that?
I can see the advantage of a bypass valve next to the base plate as opposed to one at the other end where dirt can wash off of the filter media and into the engine. But sometimes it is hard to tell what you have without cutting the filter apart.
As for flow I changed oil in my Evo 8 the other day and used a filter sized for a 1995 Dodge Stealth installed empty. It was a K&N. The oil was Mobil 1 10W-40. So dry filter and thicker than normal oil. I had oil pressure 1 second after I turned the key.
Manufacturers seem very interested in oil. They are constantly coming up with new specifications. On the oil filter side of the equation it is nothing but crickets. I don't know why.
I can see the advantage of a bypass valve next to the base plate as opposed to one at the other end where dirt can wash off of the filter media and into the engine. But sometimes it is hard to tell what you have without cutting the filter apart.
As for flow I changed oil in my Evo 8 the other day and used a filter sized for a 1995 Dodge Stealth installed empty. It was a K&N. The oil was Mobil 1 10W-40. So dry filter and thicker than normal oil. I had oil pressure 1 second after I turned the key.
Manufacturers seem very interested in oil. They are constantly coming up with new specifications. On the oil filter side of the equation it is nothing but crickets. I don't know why.
To put things in perspective, it's of little consequence and mostly academic if it does in fact pop open intermittently in certain situations. Where omitting the bypass valve is of greatest potential benefit is when breaking in a new engine.
http://kiggly-racing.com/oil_filter_losses
If you have ever spun a bearing, you will likely find bearing trash in the cylinder head much larger than what could pass through the oil filter media.
Last edited by wreckleford; Jun 29, 2015 at 05:39 PM.
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Would also be great if there was a two stage filter that had sub-30 micron filtration for low flow conditions and then 45 micron filtration for high flow conditions.
