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  #1  
Old 07-09-2013, 05:23 PM
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This seems like a no brainer but... oil restricter?

Running an HX25 with an external wastegate on my OM617. Is anyone familiar with these holset turbos? The oil feed appears to have a built in restricter but I just wanted to verify I could plumb straight into the turbo with oil.
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Old 07-09-2013, 08:46 PM
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I cut and pasted this from Garrett's website. It applies to all turbos.

Oil Supply & Drainage

Journal Bearing Turbo

"Journal-bearings function similarly to rod or crank bearings in an engine - oil pressure is required to keep components separated. An oil restrictor is generally not needed except for oil-pressure-induced leakage. The recommended oil feed for journal bearing turbochargers is -4AN or hose/tubing with an ID of approximately 0.25. Be sure to use an oil filter that meets or exceeds the OEM specifications. "


Ball Bearing Turbo

"An oil restrictor is recommended for optimal performance with ball bearing turbochargers. Oil pressure of 40 - 45 psi at maximum engine speed is recommended to prevent damage to the turbocharger's internals. In order to achieve this pressure, a restrictor with a 0.040' orifice will normally suffice, but you should always verify the oil pressure entering the turbo after the restrictor in insure that the components are functioning properly. Recommended oil feed is -3AN or -4AN line or hose/tubing with a similar ID. As always, use an oil filter that meets or exceeds the OEM specifications. "

"OIL LEAKAGE SHOULD NOT OCCUR ON A PROPERLY FUNCTIONING SYSTEM IF RESTRICTOR IS NOT USED UNLESS THE SYSTEM PRESSURE IS EXCESSIVELY HIGH. "

Original site: Oil & Water Lines | Turbobygarrett

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Old 07-10-2013, 05:04 PM
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Yep read that. Problem is the hx25 appears to have an integrated restrictor. This turbo is common on 4bts., maybe I'll ask those people.
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...In progress
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  #4  
Old 07-13-2013, 03:10 PM
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The engines these were used on use about 60 psi. An om617 has 120 psi approximately. if you want to overwhelm the holset bearing seals--this is a good way--just run this restrictor , or do away with any restrictor.
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Old 09-19-2014, 11:45 PM
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Quote:
Originally Posted by stomis View Post
Running an HX25 with an external wastegate on my OM617. Is anyone familiar with these holset turbos? The oil feed appears to have a built in restricter but I just wanted to verify I could plumb straight into the turbo with oil.
How did you mate the hx25 to the intake, and how do you like the performance? Thanks.
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  #6  
Old 11-01-2014, 05:46 AM
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Its performance is good!
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