| rens040 |
Sat Aug 24, 2019 10:28 am |
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Hey guys!
Maybe a dumb question, but i’m going to ask it anyway...
My engine is already build with a full flow oil system with external filter etc.
I noticed that my oil restrainer is still present...
Is it wise to leave it in or not?
My feeling is that it is now useless as i have an external oil filter.
But i don’t know if this thing has any other purpose. |
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| jpaull |
Sat Aug 24, 2019 11:24 am |
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If its still there, i would leave it. It helps keep the pickup tube secured. Once you remove it, you only have the tiny tab holding the pickup in place, and vibrations take a toll.
When running a sump that has the larger drain plate that wont allow for using the stock strainer, I weld the pickup tube tab to give it a little more strength. After having a tab break off and the pickup tube bouncing off the crank, I wanted to do something to help. |
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| mark tucker |
Sat Aug 24, 2019 11:26 am |
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| yes leave it. unless you want something bigger than a small booger getten to the pump and locking it up. |
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| rens040 |
Sat Aug 24, 2019 11:35 am |
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Id do have a somewhat larger sump.
It’s not one of those extra sumps underneath but onle a extension of de original sump plate.
My oil pickup has also an extension welded to it so it is still secured by the sump plate.
Ps. I have one of these:
http://www.german-performance-parts.be/index.php?i...mp;lang=NL |
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| vwracerdave |
Sat Aug 24, 2019 1:12 pm |
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| On every engine I have ever built with a FF oil system I DO NOT use the factory oil strainer. On every engine I have built with a deep sump I clamp a magnet to the pick-up tube. |
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| rens040 |
Sun Aug 25, 2019 6:58 am |
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Thanks guys,
I think i’ll remove it next oil change then.
That will be this winter as i’m planning to make some changes to the engine.
( different heads and carbs ) |
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| Glenn |
Sun Aug 25, 2019 7:41 am |
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The strainer protects the oil pickup from sucking something into the pump. I once had a stud that held the sump to the case come loose.
So unless you're turning 8000 rpm and afraid of oil starvation... leave itm |
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| 67rustavenger |
Sun Aug 25, 2019 9:21 am |
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I have first person experience with the strainer/no strainer choice.
I built a 2180 recently. On the first ideration of the build. One of the spring bosses in the head failed. Not really understanding what was happening inside the engine. I kept driving the car. That is until the engine lost oil pressure.
Upon tear down. I discovered that the little chunks of aluminum from the spring boss had gotten lodged in between the oil pump gears. Hence the loss of oil pressure. I had chosen to not run the oil strainer.
Had I had the strainer in place. The engine might not have lost oil pressure.
In the end, I had to do a complete tear down and rebuild with new heads.
This time, I made damn sure that the strainer was in place.
It really comes down to a personal choice, whether you run a strainer or not.
Lesson learned for me!
Good luck.
rens040 wrote: Thanks guys,
I think i’ll remove it next oil change then.
That will be this winter as i’m planning to make some changes to the engine.
( different heads and carbs ) |
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| within.1 |
Sun Aug 25, 2019 9:36 am |
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| Gene berg claimed even with a little higher performance and rpm the oem strainer produces to much suction therfore oil starvation so i do as he did on all his engines thats remove the strainer and clamp magnets to pickup tube i use rare earth magnets there much stronger then the old type |
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| jpaull |
Sun Aug 25, 2019 9:45 am |
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within.1 wrote: Gene berg claimed even with a little higher performance and rpm the oem strainer produces to much suction therfore oil starvation so i do as he did on all his engines thats remove the strainer and clamp magnets to pickup tube i use rare earth magnets there much stronger then the old type
How does Gene Bergs magnet idea stop aluminum chunks and bearing material? |
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| richparker |
Sun Aug 25, 2019 9:56 am |
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| I’ve had a 2109, two 2175 and a 2275 all built for a bus with deep sumps, external coolers and oil filters. All 4 have had strainers, no issues. |
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| 67rustavenger |
Sun Aug 25, 2019 10:13 am |
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jpaull wrote: within.1 wrote: Gene berg claimed even with a little higher performance and rpm the oem strainer produces to much suction therfore oil starvation so i do as he did on all his engines thats remove the strainer and clamp magnets to pickup tube i use rare earth magnets there much stronger then the old type
How does Gene Bergs magnet idea stop aluminum chunks and bearing material?
My exact thought. Plus what about the brass off the crankshaft worm gear?
If someone comes up with a magnet that attracts brass. That'd be awesome! |
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| [email protected] |
Sun Aug 25, 2019 10:24 am |
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The stock strainer is restrictive. But the strainers available NOW are a coarser mesh, and not nearly as restrictive. I also used to omit the stock strainer on HP builds, but saw enough damage from that (including one of my own) to start putting them back.
I even saw engines with deep sumps have the pick up tube crack from vibration fatigue, but never when a strainer was on it (damping the harmonics).
Pay attention, learn from your mistakes, and most of all learn from other's mistakes. |
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| within.1 |
Sun Aug 25, 2019 12:25 pm |
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| I thought about the brass but there would have to be hunks broke off for the strainer to stop it also with a strainer with even bigger holes in the screen it would let more debris thru then the oem i think its tit for tat take your chances either way specially with a hi revn engine.as far as vibration i can understand that.this is my first engine removing the strainer in 43 yrs because its a hi revn stroker so il see.a piece of debris can stil get thru the oem strainer to screw the oil pump all it takes is a piece of metal from somwhere off the engine to make it thru the big holes in strainer iv seen lots of oem oil pumps have deep grooves in the housing of the pump so somthing got thru the strainer |
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| 67rustavenger |
Sun Aug 25, 2019 12:38 pm |
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Had I used the strainer on my first build.
This would not have happened.
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| within.1 |
Sun Aug 25, 2019 1:35 pm |
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| Yes thats concerning to me as i stated this is first time i ever removed the strainer on a engine but i think im going to get a new strainer as john stated and put it back on i have a mechanical oil gauge so i should be able to tell if it flacuates at hi rpm |
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| raygreenwood |
Sun Aug 25, 2019 3:30 pm |
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within.1 wrote: I thought about the brass but there would have to be hunks broke off for the strainer to stop it also with a strainer with even bigger holes in the screen it would let more debris thru then the oem i think its tit for tat take your chances either way specially with a hi revn engine.as far as vibration i can understand that.this is my first engine removing the strainer in 43 yrs because its a hi revn stroker so il see.a piece of debris can stil get thru the oem strainer to screw the oil pump all it takes is a piece of metal from somwhere off the engine to make it thru the big holes in strainer iv seen lots of oem oil pumps have deep grooves in the housing of the pump so somthing got thru the strainer
With filtration mesh...its not about the hole size.
I work with filtration meshes in my industry. They are NOT just basic woven mesh. The type of weave, the treatment of the wire or filament etc...have everything to do with flow rate even while making smaller actual holes to trap particles.
I can guarantee than virtually no one here has even heard of the types of filtration mesh weaves there are. Its not hard to get a low particle size/high volume/low restriction mesh. You just have to tell the mesh companies what you require.
The difference that may need to be corrected...is the angle at which the liquid is going to be pulled/pushed through the mesh. The trick is that wide open area/high filtration meshes are directional.
The mesh in the strainer...is not a filtration mesh. Its just a basic mesh.
One could do better....
Ray |
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| oprn |
Sun Aug 25, 2019 6:39 pm |
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Magnets are not going to pick up aluminum, brass, bits of loose carbon, pieces of tappet cover gasket and yes now and then a bit of gravel just might drop off your oil can, gloves or tools when changing oil or adjusting valves. That strainer is the pump's only line of defence, leave it there and service it regularly!
They only get restrictive when they are already full of crap or you're running molasses instead of oil. |
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| oprn |
Sun Aug 25, 2019 7:54 pm |
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| double post |
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| within.1 |
Mon Aug 26, 2019 3:39 am |
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| I agree leave strainer in but its still good to have magnets on the hat of pickuo but i do not agree the strainer does not retrict the oil specially at hi rpms it has to but what that rpm is i dont know also gravel off the oil bottles or adjusting valves it takes someone that is very nieve to not clean the bottles,funnel and hands of while doing such things but im sure they is ppl like that if so they deserve to have problems imo.also i can guarentee a strainer does not catch all damaging debris i took enough oem and aftermarket oil pumps out that had the strainer on and the housing of pumps be grooved bad from debris geting by strainer but theres where neodium or rare earth magnets help alot placed around the hat of pickup |
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