Turbo oiling for 2.2 85 Daytona
A 1/16 line at 60-70 psi of oil pressure will flow a ton of oil. Ever forget to put the oil pressure sensor in a block before priming? Journal bearing turbos need only enough oil to maintain a constant film on the journal bearing and thrust surface. Usually 040 is plenty. Roller bearing or ceramic bearing turbos require even less. The reason to restrict the oil inlet is simple, you only want what you need and not more. More oil will only cause problems. IE smoking, puddling, and coking after shut down when hot. Not too mention an overly large feed line is a direct oil pressure leak so if it’s too big you will notice an oil pressure drop on the engine side. You want a big return back to the pan and it should be as straight as possible. FYI the GT55 Garret on my truck has over 350k miles on it and it’s remote mounted (so about 12 feet from the engine) and it’s fed by a -3 SS braided oil feed line with a 030 restrictor. The twin turbo big block for my boat has two -3 braided SS feeds with no restriction, those are VS racing 7875s and Viren (owner of VS) said to not run oil feed restrictors on them.
You can see basically the turbo whole oil system in this photo.
A 1/16 line at 60-70 psi of oil pressure will flow a ton of oil. Ever forget to put the oil pressure sensor in a block before priming? Journal bearing turbos need only enough oil to maintain a constant film on the journal bearing and thrust surface. Usually 040 is plenty. Roller bearing or ceramic bearing turbos require even less. The reason to restrict the oil inlet is simple, you only want what you need and not more. More oil will only cause problems. IE smoking, puddling, and coking after shut down when hot. Not too mention an overly large feed line is a direct oil pressure leak so if it’s too big you will notice an oil pressure drop on the engine side. You want a big return back to the pan and it should be as straight as possible. FYI the GT55 Garret on my truck has over 350k miles on it and it’s remote mounted (so about 12 feet from the engine) and it’s fed by a -3 SS braided oil feed line with a 030 restrictor. The twin turbo big block for my boat has two -3 braided SS feeds with no restriction, those are VS racing 7875s and Viren (owner of VS) said to not run oil feed restrictors on them.
You can see basically the turbo whole oil system in this photo.
