Restrictors are normally only placed on ball bearing turbochargers. Journal bearing turbo's need the higher flow, and on Holset cartridges the overflow of oil will drain quite easily if the return piping is big enough. If not, it will piss through the piston ring end causing oil caulking which kills it.
If you use the 1.6mm restrictor used on Garrett items it will kill the spherical bearing within hours... unless your pump pressure is high enough to supply the 4 litre per minute through the restrictor...
If you use the 1.6mm restrictor used on Garrett items it will kill the spherical bearing within hours... unless your pump pressure is high enough to supply the 4 litre per minute through the restrictor...
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