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#1
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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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1994 Isuzu Trooper OM617/W56/2.28 toy doubler Dana 44 front, lockright / Ford 8.8 Ox locker 4.56s ...In progress |
#2
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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 All content property of Garrett, et. al, etc, etc...
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-Evan Benz Fleet: 1968 UNIMOG 404.114 1998 E300 2008 E63 Non-Benz Fleet: 1992 Aerostar 1993 MR2 2000 F250 |
#3
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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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1994 Isuzu Trooper OM617/W56/2.28 toy doubler Dana 44 front, lockright / Ford 8.8 Ox locker 4.56s ...In progress |
#4
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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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#5
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How did you mate the hx25 to the intake, and how do you like the performance? Thanks.
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#6
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Its performance is good!
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