Silvia turbo info

S13 T-25
60 trim 56mm BCI-1 compressor 53.8mm 62 trim

T-25 turbine, .64 A/R turbine housing. Journal bearings.

S14 T-28
60 trim 60 mm BCI-1 compressor in T-04B housing, 62 trim 53.8mm

T-25 turbine. .64 A/R turbine housing. Ball bearing center section.

S15 T-28
60 trim 60 mm BCI-1 compressor in T-04B housing, 62 trim 53.8mm

Inco turbine .64 A/R turbine housing. Ball bearing center section.

*cast divider wall between turbine discharge and wastegate.

GTi-R T-28
60 trim 60 mm BCI-1 compressor in standard T-3 housing. 79 trim 53.8mm

Inco T-250 turbine wheel .86 A/R turbine housing. Journal bearings.

For any aussies reading this it's been established by checking turbos on many forum goers cars that aussie S14s (i had thought that all S14s were plain bearing but this i can't say for sure) have a plain bearing turbo as do aussie S15s, we did however get the cool light strong inconel parts in the S15 turbo so they are almost as good. They are however not worth the $800-900 going rate of a S15 T28BB so make sure you find out, you might be able to snap up a plain bearing one for $500-600 instead :)