Do poeople typically run oil feed restrictors on a cossie if running a GT series roller bearing garrett?

 

Yes the adapter in th top of the turbo supplied with your bb turbo will have a smaller restricted hole this needs to be run,

 

So the little ball valve thingie in the oil feed port that came fitted in the turbo from garrett is all that needs to be run?
I hear many stories about restrictors being added. There is no reason to add a restrictor in?

 

So FYI guys,
I should have looked at the Garrett site before asking questions...

"Garrett ball bearing turbochargers require less oil than journal bearing turbos. Therefore an oil inlet restrictor is recommended if you have oil pressure over about 60 psig. The oil outlet should be plumbed to the oil pan above the oil level (for wet sump systems). Since the oil drain is gravity fed, it is important that the oil outlet points downward, and that the drain tube does not become horizontal or go “uphill” at any point."

"Reduced Oil Flow – The ball bearing design reduces the required amount of oil required to provide adequate lubrication. This lower oil volume reduces the chance for seal leakage. Also, the ball bearing is more tolerant of marginal lube conditions, and diminishes the possibility of turbocharger failure on engine shut down."

 

Garrett units come with the restrictor built in.

So NO separate restrictor should be required.

Other brands may or may not.