Dan:

Depends on what setup you use for your AWD dyno. Some of the older units scrub off lots of power, some of the newer units don't have use the car's wheels at all, but rely on a calcualtion from the actual hub assembly mounted to measuring devices. Similar to how you get BHP on a motor from a bench.

The numbers I have reflect a 22.1% driveline loss at peak HP for the WRX through a typical AWD dyno. This looks to be close to accurate.

I believe in the article you're referring to, they did not mechanically convert the car to 2wd. The reasons why the AWD WRX dynoed so closely to the 2wd WRX is most likely because they invoked the "limp home" mode via the ECU, which disables one set of drive wheels, but ALSO retards the flow of fuel and decreases the spark advance. They may or may not have known this...

Further, all driveline/dyno losses have to be ignored to some degree as we really don't have another means of baseline comparison. The bottom line would be if they are close at baseline A and x mods are done to each, the same dynos should give you a new baseline.

SVT baseline at ~165hp/~155TQ -- then add headers, chip, exhaust, intake, TB, MAF, etc to get to ~184hp/~157TQ.

WRX baseline at ~176hp/~184TQ -- add chip, intake, exhaust, boost control, water spray to get to ~222hp/~220TQ.

If they were close at stock, the overwhelming % of increase in the basic mods makes the difference larger. No longer a driver's duel.

My only hope is to see a breakdown of HP/TQ for each and compare why they may be close in one arena and not close in another.

My guess is this:

WRX has more hp/tq available over a larger usable portion of the powerband.
WRX has a higher redline enabling the bosst to be effective for longer period of time.
WRX is not as gutless below 3150rpm as one would think.
WRX gearing is designed to keeps revs up despite lowering top speed.
AWD gives a crucial advantage on the launch.

Reasons why the SVT may have an advantage on a roll:

N/A engines have a better throttle response b/c of no turbo lag.
Initial benefit of AWD launch negated by the roll (correllary the moment of inertia to motivate more "hub" weight of AWD is already overcome)
Final drive ratio may have an edge when rolling from 5mph.

These are the things I'm hoping to find out in a non-confrontational manner.

Besides all this info I'm going to be meeting up with some of the guys from the Capitol CEG to see what kind of advantages each car has from what speeds, what gears, etc.

Thanks for any help you can give.

Ed