From
http://www.supraforums.com/forum/showth ... ct20-twins
Manufacturer Toyota (Hitachi)
Type CT-20 (PN: 17201-46020 (Front), 17208-46020 (Rear)
Turbine size (Outlet diameter) 48mm
Turbine size (Inlet diameter) 59.8mm
Turbine blade count 10
Turbine material Ceramic
Turbine housing Inlet (ID) 36mm
Turbine housing Outlet (ID) 50.1mm
Turbine shaft Diameter 10mm
Turbine housing A/R .35
Compressor size (Inlet diameter) 37mm
Compressor size (Outlet diameter) 62mm
Compressor blade count 10
Compressor material Aluminium
Compressor housing Inlet (ID) 49.8mm
Compressor housing Outlet (ID) 32.4mm
Compressor housing A/R .36
*Wastegate size (ID) 26mm
Actuator spring rate 10 psi
Bearing ID 10.05mm
Bearing OD 15.9mm
Bearing width 9mm
Bearing material Bronze
Bearing oiling holes (per bearing) 6
Manufacturer Toyota (Hitachi) Export Specification (Steel Turbines)
Type CT-12B (PN: ? (Front), ? (Rear)
Turbine size (Outlet diameter) 44mm
Turbine size (Inlet diameter) 52mm
Turbine blade count 9
Turbine material Steel
Turbine housing Inlet (ID)
Turbine housing Outlet (ID) 50.1mm
Turbine shaft Diameter 7.5mm
Turbine housing A/R
Compressor size (Inlet diameter) 39mm
Compressor size (Outlet diameter) 58mm
Compressor blade count 10
Compressor material Aluminium
Compressor housing Inlet (ID) 49.8mm
Compressor housing Outlet (ID)
Compressor housing A/R
*Wastegate size (ID) 30mm
Actuator spring rate 10 psi
Bearing ID 8.53mm
Bearing OD 13.55mm
Bearing width 9mm
Bearing material Bronze
Bearing oiling holes (per bearing)
