um, no.
Both are twin-scroll, same mani. ..
Compressor housing shot IX left VIII right:
I believe it is 2005 > has a larger exhaust housing 10.4 to 9.8 or something close to that.
Stolen from EVOM:
Evolution 8
Turbo = TD05HR-16G6-9.8T (GSR / USDM)
TD05HRA-16G6-9.8T (RS/RS2 & NZDM) or 6MT:TD05HRA-16G6-10.5T (model unknown)
Nozzle Area (cm2) = 9.8
Turbine = USDM EVO 8 & JDM GSR =Inconel (steel alloy),
RS=Titanium alloy.
Compressor = Aluminium, 68mm wide
Evolution MR aka "8.5"
GSR = TD05HR-16G6-10.5T or TD05HRA-16G6-10.5T (Ti Alloy option)
RS = 6MT:TD05HRA-16G6-10.5T or 5MT:TD05HRA-16G6-9.8T
Nozzle Area (cm2) = 10.5 or 9.8(RS-5speed)
Compressor = Aluminium, 68mm wide
Evolution 9
USDM & JDM = TD05HRA-16G6C-10.5T
Turbine: GSR / GT = Inconel alloy, RS = Titanium alloy
Compressor: GSR / GT = Aluminium, RS = Magnesium Alloy
(??) mm wide (to be verified.)
Nozzle Area (cm2) = 10.5 (note: to be confirmed that RS 5MT has 10.5)
RS E9 turbo part number 1515A059 (approx cost 250,000 yen from Mitsi Japan). *Warning* There are reports of RS magnesium compressor wheel failing if boosted above stock boost.
More Evo 9 Turbo info:
... * New more efficient & larger Compressor preventing compressor surge
... * Better pump gas efficiency
... * Turbine Nozzle Area (cm2) = Large 10.5 Hotside (single flapper)
... * Improve actuator design