What is an oil restrictor?

Definition & Description. An Oil Restrictor installs in the oil passages of the engine block. It limits the flow of oil to some parts of the engine.

Do I need oil feed restrictor?

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. Be sure to use an oil filter that meets or exceeds the OEM specifications.

What is turbo restrictor?

A turbo restrictor is essentially a tube fitted directly on the turbocharger’s air intake. The presence of the restrictor, which actually accelerates the gases flowing through it and directs the air flow to the center of the turbocharger’s compressor wheel, essentially increases the engine torque.

What does a turbo oil feed line do?

The turbo oil drain is a pipe that connects your turbo chargers oil gallery to the engine, this drains the oil away from the bearings inside the turbo charger. The pipe is connected typically to the sump or the lower portion of the engine block.

Why do Turbos need oil restrictors?

If the oil pressure is too high, leakage may occur from the turbocharger seals. Ball-bearing turbochargers can benefit from the addition of an oil restrictor, as most engines deliver more pressure than a ball bearing turbo requires.

How much engine oil pressure is too much?

A PSI over 80 is usually considered too high for the engine to properly be protected from damage. High oil pressure is an indicator that the oil is not able to properly pass through the bores and reach all parts of the engine effectively.

Can a turbo get too much oil?

If there is too much oil in the pan or if the turbocharger in your car is relatively lower, then oil can get through the seals and begin to blow out. This happens because the restrictor will starve the turbo of oil, which will cause all of the internals of the turbo (including all of the seals) to wear out.

How much oil flow does a turbo need?

Oil pressure entering a ball-bearing turbocharger needs to be between 40 psi and 45 psi at the maximum engine operating speed. For many common passenger vehicle engines, this generally translates into a restrictor with a minimum of 0.040″ diameter orifice upstream of the oil inlet on the turbocharger center section.