The uprated 10.5 Turbo housing for 05, is this a USDM only change?, did the rest of the world also get the same change?

 

Taken from Mitsubishi Japan website:



Engine

• The well-proven 2-liter in-line 4-cylinder 16-valve DOHC intercooler-turbocharged 4G63 engine has undergone detail improvements. The power unit retains Lancer Evolution's trademark flat torque band that kicks in from low engine speeds but now generates gutsier torque in the mid- to high-rev band.*
• The turbocharger uses a larger turbine nozzle with matching cam profile to deliver higher output at mid- to high engine speeds.*
• The turbocharger waste gate now uses two solenoids. This optimizes boost pressure control to give more stable torque in the low to mid-range and helps the powerplant to generate class-topping torque of 40.8kg-m (400N-m) at 3,500 rpm.*
• Durability is improved through shape optimization and reinforcement of the cooling water channels, uprating from a 3-ply to 5-ply head gasket and the use of magnetic ion-coated piston rings.
• Engine response is improved with the use of lighter silent shafts.
• Cooling performance is improved with the use of a larger oil cooler that features two extra rows.
  (* RS 5M/T excluded)

 

I think the 10.5 turbine nozzle on the USDM 2005 MR,GSR, RS is the same as the JDM Evo VI and the rest of the world.

 

The one thing I noticed on that list is the "Matched Cam Profile" I'm not sure, but everything I've seen and read so far shows the cams are the same..

The 10.5 housing has a revised wastegate flapper, but overall its similar to the earlier 10.5 housings used in other turbos, I did discover that the Compressor cover is also different than the earlier turbo.. But there's no firm data showing that its any better or worse..

 

Perhaps the USDM cars are not equipped with this so called "matched cam profile". If there is any way to get ahold of the JDM part numbers for these cams I could compare.

 

I read on the other threads that the USDM MR evos dont get the titanium components in their turbos... the JDMS and the UKDMS do get these...