Turbo Oil Feed | Garrett - Advancing Motion

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 to ensure the components function 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.
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.
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[@zannetoschristou5339]

ROB SIMMONS what is the suitable oil restrictor (mm size ??)turbo 3582R ball-bearing turbo garrett ??

[@ngt84]

Ball bearing Garrett turbos have internal oil restrictor. Its either a 1.0 or 0.8mm do we need to install a second external oil restrictor ?

[@zannetoschristou5339]

Tuning Perfection ...Where are you from? Are you Greek?