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  #1  
Old 05-23-2013, 02:27 PM
JB3 JB3 is offline
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orifice size for the turbo oil supply on 617?

ditto title, Im working on turbo oiling for a swap im doing, and somehow I misplaced the turbo oil feed line. Not a big deal, as it was going to be modified anyway, but what I don't know is how big that restrictive hole might be.
Does anyone have the info?

it would be for a turbo from an 83 300D, manufacturer of the turbo itself is too rusty

EDIT- the data im finding says its 2mm, does that sound correct?
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1983 240D 4-speed DD
1974 240D 5-speed, 617 turbo (project)
1989 Chevy Astro, 617 turbo powered, 5-speed, 4.56 diff (work van)
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  #2  
Old 05-23-2013, 04:13 PM
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2mm sounds about right...

.060" is the general diameter for most turbos...
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Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership
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  #3  
Old 05-23-2013, 06:00 PM
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excellent! thanks
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1983 240D 4-speed DD
1974 240D 5-speed, 617 turbo (project)
1989 Chevy Astro, 617 turbo powered, 5-speed, 4.56 diff (work van)
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  #4  
Old 05-23-2013, 06:22 PM
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This is what I have in My Notes supposedly from ForceInduction:
Restricted Fitting for the Turbo Charger + 2mm
2mm, as close to the turbo as possible

You might find back-up info on that at superturbodiesel.

Does anyone know the specific reason for the restriction?
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  #5  
Old 05-23-2013, 06:57 PM
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On an 1,800 horsepower Toyota 2JZ inline 6 with a 6" Turbo we only ran a .045" restriction...FWIW
Attached Thumbnails
orifice size for the turbo oil supply on 617?-custom-6-inch-turbo-toyota-2jz.jpg   orifice size for the turbo oil supply on 617?-supra-race-car.jpg  
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Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership
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  #6  
Old 05-23-2013, 06:58 PM
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2.0mm = .078" more or less.

I would prefer to see .060" in most cases. Larger restrictions can lead to oil migration through the turbo's sealing rings...
__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership
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  #7  
Old 05-23-2013, 10:55 PM
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Quote:
Originally Posted by Doktor Bert View Post
2.0mm = .078" more or less.

I would prefer to see .060" in most cases. Larger restrictions can lead to oil migration through the turbo's sealing rings...
This is new to Me. Where I worked We always replaced damaged Stock Parts with other Stock Parts.



Maybe there needs to be some reverse engineering.
What is the actual size of the restriction in the Stock Turbocharger Oil Line and where is it located?


There needs to be a balance. Too much Oil won't drain out of the Bearing Housing fast enough and cause the leaks you spoke of.

While reducing the size of the orifice a little might not harm the Bearing it is the Oil that cools the Bearing Housing.

Not enough Oil might cause coking/Carbon Build-up on the Exhaust side of the Turbo.

I suppose also if the Orifice is too big it could have an effect on the Idle Oil Pressure.
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  #8  
Old 05-23-2013, 11:26 PM
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Interesting points you all have brought up, I'm glad you have mentioned them. If the restriction needs to be close to the turbo, that will work well for my purposes. Ill be making an adapter plate to an AN fitting, and my plan was to install a restriction plate between this adapter and the turbo
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1983 240D 4-speed DD
1974 240D 5-speed, 617 turbo (project)
1989 Chevy Astro, 617 turbo powered, 5-speed, 4.56 diff (work van)
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  #9  
Old 05-24-2013, 12:20 AM
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Place the restriction at the turbo. Keep in mind that .040" to .060" is the standard for most all units. Think...if .040" to .060" works with the heat, load & turbine speed of a 1,000+ horsepower engine at 8,000+ rpm, why wouldn't it work in a 617???
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Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership
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  #10  
Old 05-24-2013, 09:16 AM
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If I knew what size the Stock Orifice was and matched what is stock size is I would have no doubt that; that size would work.
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84 300D, 82 Volvo 244Gl Diesel
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  #11  
Old 05-24-2013, 11:12 AM
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I believe you will find the hole to be around 2.0mm
__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership
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  #12  
Old 05-24-2013, 11:50 AM
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Quote:
Originally Posted by Doktor Bert View Post
I believe you will find the hole to be around 2.0mm
Thanks.
Is it in the very brazed on Flange that bolts to the Turbo Oil Inlet?
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  #13  
Old 05-24-2013, 11:53 AM
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Quote:
Originally Posted by Diesel911 View Post
Thanks.
Is it in the very brazed on Flange that bolts to the Turbo Oil Inlet?
With T-3 turbos, yes, but I have seen the restriction in the turbo housing with KKK units...
__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership
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  #14  
Old 05-28-2013, 12:28 PM
JB3 JB3 is offline
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so here was my solution, have not yet tested-

a thin steel plate with a 2mm hole, and then a larger 1/2 inch steel plate with a AN fitting to go to my feed setup


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1983 240D 4-speed DD
1974 240D 5-speed, 617 turbo (project)
1989 Chevy Astro, 617 turbo powered, 5-speed, 4.56 diff (work van)
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  #15  
Old 05-28-2013, 12:35 PM
Doktor Bert's Avatar
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Thumbs up....
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Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership
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