The Twin Screw Thread
#1231
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I guess I could try the separator and drain it back to the pan. I'm not too thrilled about the external plumbing and drain back. I'd rather have the oil stay in the the block. Andy's oil filler is just a plate. It has a rather small inlet (becomes an outlet), I suppose in an attempt to reduce oil ejection, but all that does is make oil filling painfully slow. So, some modification of that inlet, ala Tony's baffling, making sure the pot scrubber is secure from going where it should not be, sounds like a worthy project.
#1232
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Originally Posted by Bill Ball
I guess I could try the separator and drain it back to the pan. I'm not too thrilled about the external plumbing and drain back. I'd rather have the oil stay in the the block. Andy's oil filler is just a plate. It has a rather small inlet (becomes an outlet), I suppose in an attempt to reduce oil ejection, but all that does is make oil filling painfully slow. So, some modification of that inlet, ala Tony's baffling, making sure the pot scrubber is secure from going where it should not be, sounds like a worthy project.
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Bill,
I added the extra breather line out of the drivers side cam cover and have never had an oil issue. One hard track day and many high RPM runs and I have never had oil in my 'catch can'. I am not saying this is the cure but I have been happy with it on two different superchared motors.
I added the extra breather line out of the drivers side cam cover and have never had an oil issue. One hard track day and many high RPM runs and I have never had oil in my 'catch can'. I am not saying this is the cure but I have been happy with it on two different superchared motors.
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#1236
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I’ve been working on an early 90’s Nissan NX2000, 2.0L 16V DOHC (SR20D) engine. These engines come from the factory with an external oil separator that looks to be simple enough to install on a boosted 928. The oil separator is about the size of a coffee mug and has a high inlet and a low outlet. Because of this small size, this could work really well on a 928. I already have an custom catch can but perhaps anyone that is thinking of installing a self draining catch can might want to look into pulling one off at the wreckers.
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Originally Posted by Imo000
I’ve been working on an early 90’s Nissan NX2000, 2.0L 16V DOHC (SR20D) engine. These engines come from the factory with an external oil separator that looks to be simple enough to install on a boosted 928. The oil separator is about the size of a coffee mug and has a high inlet and a low outlet. Because of this small size, this could work really well on a 928. I already have an custom catch can but perhaps anyone that is thinking of installing a self draining catch can might want to look into pulling one off at the wreckers.
#1238
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Well I thought I had a picture... but I guess I don't. I'll be working on the car tonight and I'll see if I can get a decent picture for you, but there's a lot of crap in the way...
#1239
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Originally Posted by BrianG
Can you post up a picture of the thing??
Here is a link to one. http://www.serca.org/regions/texas/i...e/MVC-019S.JPG It's the black rectangular box, next to the boost tube.
#1240
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Originally Posted by Bill Ball
I guess I could try the separator and drain it back to the pan. I'm not too thrilled about the external plumbing and drain back. I'd rather have the oil stay in the the block. Andy's oil filler is just a plate. It has a rather small inlet (becomes an outlet), I suppose in an attempt to reduce oil ejection, but all that does is make oil filling painfully slow. So, some modification of that inlet, ala Tony's baffling, making sure the pot scrubber is secure from going where it should not be, sounds like a worthy project.
#1241
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Brian:
Yes, it appears a lot of oil is getting thrown up and blown out the oil filler inlet. So, either an elbow or a plate on spacers on the bottom of the filler plate that the oil will hit and hopefully just drop off of, seems like a plan. Then I could increase the filler inlet size to allow faster oil changes. I literally have to drip the oil in now or it backs up. In fact, that may contribute to the oil blow out since it doesn't take much oil to seal the opening and then the air flow blows it out. So, a wider opening might, perhaps counterintuitively, promote less oil ejection.
Yes, it appears a lot of oil is getting thrown up and blown out the oil filler inlet. So, either an elbow or a plate on spacers on the bottom of the filler plate that the oil will hit and hopefully just drop off of, seems like a plan. Then I could increase the filler inlet size to allow faster oil changes. I literally have to drip the oil in now or it backs up. In fact, that may contribute to the oil blow out since it doesn't take much oil to seal the opening and then the air flow blows it out. So, a wider opening might, perhaps counterintuitively, promote less oil ejection.
Last edited by Bill Ball; 08-31-2006 at 05:29 PM.
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Bill, I used Andy's breather lines, except that I excluded the oil filler, plus I put the brillo-pad in the vertical line that rises from the oil-filler housing cover-plate, hoping that condensate will fall back down to the engine right there.
I am using the forward PCV vent hole (that has the OEM plastic plug in it) on the left cam cover for oil replenisment. I removed the cir-clip from the inside groove of the plug, and just replaced the old O-ring with a new one. The fit of the plug is firm. It remains to be seen if it will stay in place when the engine is run (hard). I figure that if it get's blown out, I can fit a second o-ring to where the circlip was, as well.
I am using the forward PCV vent hole (that has the OEM plastic plug in it) on the left cam cover for oil replenisment. I removed the cir-clip from the inside groove of the plug, and just replaced the old O-ring with a new one. The fit of the plug is firm. It remains to be seen if it will stay in place when the engine is run (hard). I figure that if it get's blown out, I can fit a second o-ring to where the circlip was, as well.
#1243
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Originally Posted by BrianG
Bill, I used Andy's breather lines, except that I excluded the oil filler, plus I put the brillo-pad in the vertical line that rises from the oil-filler housing cover-plate, hoping that condensate will fall back down to the engine right there.
I am using the forward PCV vent hole (that has the OEM plastic plug in it) on the left cam cover for oil replenisment. I removed the cir-clip from the inside groove of the plug, and just replaced the old O-ring with a new one. The fit of the plug is firm. It remains to be seen if it will stay in place when the engine is run (hard). I figure that if it get's blown out, I can fit a second o-ring to where the circlip was, as well.
I am using the forward PCV vent hole (that has the OEM plastic plug in it) on the left cam cover for oil replenisment. I removed the cir-clip from the inside groove of the plug, and just replaced the old O-ring with a new one. The fit of the plug is firm. It remains to be seen if it will stay in place when the engine is run (hard). I figure that if it get's blown out, I can fit a second o-ring to where the circlip was, as well.
#1244
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This all has to go somewhere and you need to insure the velocity stays low enough so a lot of oil isn't carried with it.
#1245
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Originally Posted by Bill Ball
That's why I think I'm losing so much oil out the filler. Andy used a tiny filler. I intend to make it much larger and probably just put a plate below it that the air will smack into and have to go around, but with enough space so the air flow is very free.