I recommend to everyone that they install restrictors. Solidsnak3 you are 100% right about the different size restrictors, ball bearing turbos require even less oil than journal bearings so they must use a small restrictor.
These are restrictors from ATPTurbo for GT series turbos: (0.035")
And for Journal bearing from ATPTurbo: (0.065")
Function7 make beautiful restrictor feed flanges and that is what I went with (you can see them bolted onto my turbos in my turbos pic). They also make nice drain flanges, I went with the 1/2" NPT ones and used barbed nipples and 1/2" hydraulic hose.
I definitely think everyone should run them in their cobra!
These are restrictors from ATPTurbo for GT series turbos: (0.035")
And for Journal bearing from ATPTurbo: (0.065")
Function7 make beautiful restrictor feed flanges and that is what I went with (you can see them bolted onto my turbos in my turbos pic). They also make nice drain flanges, I went with the 1/2" NPT ones and used barbed nipples and 1/2" hydraulic hose.
I definitely think everyone should run them in their cobra!