Here are the numbers on the turbo upgrade car versus when it had the performance package:
Peak figures are 673 wheel horsepower for the turbo upgrade car versus 509 wheel horsepower for the performance package. Torque figures are 739 wheel torque versus 536 wheel torque. A difference of just over 200 pound-feet at the wheels, quite significant.
Here is a dyno comparison between the turbo upgrade, performance package, and standard M157:
Over 225 rear wheel horsepower gain for the turbo upgrade versus the standard car and almost 300 pound-feet of torque at the wheels. Night and day figures.
Keep in mind these numbers come on pump gas and are uncorrected. No doubt people will start comparing the peak figures here the Weistec numbers in SAE correction on 100 octane. Renntech states they intend to keep this stage fairly mild with pump gas world wide in mind and a tune pushing under 20 psi.
Things are really starting to heat up in the M157 scene.