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Message: <blockquote data-quote="speed2horizon" data-source="post: 4454793" data-attributes="member: 30831">Hi brother... They are not exactly the same.Here is something to share.= on the specification.S13 Red-Top T25:Compressor: T-25, 60 trim 56mm 0.60 A/R BCI-1 compressor.Turbine: T-25, 62 trim 53.8mm 0.64 A/R turbine housing.Stock Boost: 7 psiSafe Boost: > 13-15 psi After that The Turbo is past it's efficiencyMax Boost: 17 psiHP Ratings: 240 - 250 RWHPType of Bearings: Journal BearingS13 Black-Top T25:Compressor: T-25, 60 trim 56mm 0.60 A/R BCI-1 compressor.Turbine: T-25, 62 trim 53.8mm 0.64 A/R turbine housing.Stock Boost: 7 psiSafe Boost: > 13-15 psi After that The Turbo is past it's efficiencyMax Boost: 17 psiHP Ratings: 240 - 250 RWHPType of Bearings: Journal BearingS14 Zenki (1993-96) Black-Top T28:Compressor: T-28, 60 trim 60 mm 0.60 A/R BCI-1 compressor in T-04B housingTurbine: T-25, 62 trim 53.8mm 0.64 A/R turbine housing.Stock Boost: 7 psiSafe Boost: > 13-15 psi After that The Turbo is past it's efficiencyMax Boost: 17 psiHP Ratings: 250 - 260 RWHPType of Bearings: Journal BeringS14 Kouki (1996-98) Black-Top T28:Compressor: T-28, 60 trim 60 mm 0.60 A/R BCI-1 compressor in T-04B housingTurbine: T-25, 62 trim 53.8mm 0.64 A/R turbine housing.Stock Boost: 7 psiSafe Boost: > 13-15 psi After that The Turbo is past it's efficiencyMax Boost: 17 psiHP Ratings: 255 - 265 RWHPType of Bearings: Ball BearingS15 Black-Top T28:Compressor: T-28, 60 trim 60 mm 0.60 A/R BCI-1 compressor in T-04B housingTurbine: T-25, 62 trim 53.8mm 0.64 A/R turbine housing, Inconel Turbine Wheel.Stock Boost: 7 psiSafe Boost: > 15 - 18 psi After that The Turbo is past it's efficiencyMax Boost: 20 psiHP Ratings: Approx. 300 RWHP MAXType of Bearings: Ball BearingAs u can see, the SR20 turbo varies from generation to generation. They may look exactly the same, but the inside is somewhat different.And same goes to the TD05. It evolves from generation to generation within the EVOs...VR4Turbo = TD05-14BNozzle Area (cm2) = 6Evolution 1Turbo = TDO5H–16G-7Nozzle Area (cm2) = 7Exhaust turbine = Inconel (steel alloy)Compressor = Aluminium, 60mm wideEvolution 2Turbo = TDO5H–16G-7Nozzle Area (cm2) = 7Turbine = Inconel (steel alloy)Compressor = Aluminium, 60mm wideEvolution 3Turbo = TD05H–16G6-7Nozzle Area (cm2) = 7Turbine = Inconel (steel alloy)Compressor = Aluminium, 68mm wideEvolution 4Turbo = TD05HR-16G6-9TNozzle Area (cm2) = 9Turbine = Inconel (steel alloy)Compressor = Aluminium, 68mm wideEvolution 5Turbo = TD05HR-16G6-10.5T (GSR)TD05HRA-16G6-10.5T (RS)Nozzle Area (cm2) = 10.5Turbine = Inconel (steel alloy), Titanium alloy (RS)Compressor = Aluminium, 68mm wideEvolution 6Turbo = TD05HR-16G6-10.5T (GSR)TD05HRA-16G6-10.5T (RS/rs2)Nozzle Area (cm2) = 10.5Turbine = GSR - Inconel (steel alloy), Titanium alloy (RS/RS2)Compressor = Aluminium, 68mm wideEvolution 6 : Tommi Makinen EditionTurbo = TD05RA-15GK2-10.5T (GSR)TD05HRA-16G6-10.5T (RS/rs2)Nozzle Area (cm2) = 10.5Turbine = Titanium alloy for both RS/RS2/GSR!Compressor = Aluminium, 65mm (gsr) - 68mm(rs) wideEvolution 7Turbo = TD05HR-16G6-9.8T (GSR)TD05HRA-16G6-9.8T (RS/RS2)Nozzle Area (cm2) = 9.8Turbine = GSR - Inconel (steel alloy), RS/Rs2=Titanium alloyCompressor = Aluminium, 68mm wideEvolution 7 GTATurbo = TD05-15GK2-9.0TNozzle Area (cm2) = 9.0Turbine = Inconel (steel alloy)Compressor = Aluminium, 65mm wideEvolution 8Turbo = TD05HR-16G6-9.8T (GSR / USDM ETD05HRA-16G6-9.8T (RS/RS2)Nozzle Area (cm2) = 9.8Turbine = USDM EVO 8 & JDM GSR =Inconel (steel alloy),RS/Rs2=Titanium alloy.Compressor = Aluminium, 68mm wideSo.. u can try to evaluate the turbos urself and chose the best for ur setup. Hope it helps.*TD05 specification taken from one of the jinkl's thread.</blockquote>

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