| I really wish I had a boost plot though Seb. This would give us a better indication of the compressor's operation in your car. Was this at the maximum of 24psi of boost?
RED: GT2860RS w/ .86 A/R turbine, 9-blade (Seb)
BLUE: GT2860RS w/ .64 A/R turbine, 9-blade (Dee)
GREEN: GT2860RS w/ 10-blade turbine & .63 A/R housing (Ash)
Also note, the original dynoplots I showed were not corrected. These new plots have been SAE corrected and they reveal some interesting information: it appear that my setup is actually outperforming both Dee's and Seb's completely across the RPM band: note that the uppermost green plots actually extend out to ~7800RPM although it appears that it falls off at 7000RPM - carefully inspect the color of the lines. An interesting source of info: my clutch was also slipping at peak torque - I expect to see an additional ~35RWTQ in my next dyno session. SAE Horsepower:
 SAE Torque
 This is pretty interesting to see that although I am using a significantly tighter turbine/housing than Dee and Seb, the overall effect is beneficial. It is pretty obvious that the boost is the major contributor to the performance, and the boost response is heavily dependent on the hot section of the turbocharger.
Looking at this boost/rpm plot again, it is even more evident why there is a dramatic difference in power through the bottom end and midrange, and notable gain on the top-end. It is clear (to me at least) that what makes the biggest difference in power/torque output at a given RPM is the boost level achieved. Boost level achieved is dependent on compressor speed, which is directly controlled by the turbine, which is affected by the housing selection. The pressure at the manifold has the greatest effect on power output, which makes sense: boost is like a throttlebody.
RPM...Ash........Dee........Seb
3000: (10psi) (5psi) (5psi) <-----5psi difference: appreciable
4000: (18psi) (11p) (7psi) <-----11psi difference: this is HUGE
5000: (30psi) (24p) (18psi) <----12psi difference: this is HUGE
6000: (28psi) (26p) (24psi) <----Starting to equalize
7000: (24psi) (24p) (21psi) <----Same pressure between Dee/Ash, also same power and torque.
7800: (21psi) (NA) (NA) 
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