Tuning the EVOMS/Sharkwerks 3.9L 997 GT3RS "ZKERMIT"

Using the SharkWerks/Evolution MotorSports Spec 3.9 liter pistons with new liners, displacement is increased by over 8% (from 3.6 to 3.9 liters). The larger bore pistons also feature higher compression for increased torque and horsepower through the entire RPM range. There's a lot of time, effort, and R&D that went it to this so some of the specifics are going to stay under wraps.

The new components reduce rotating mass by 2 grams per piston and 21 grams per wrist pin, ensuring the motor freely revs and responds especially well at higher RPMs.

The Evolution MotorSports custom Exhaust and Intake camshafts – built specifically for the 3.9L, add more top-end power and overall performance. We set these up to be able to hit 8800rpms...
The car spent several days on Evolution MotorSports' AWD Mustang Dyno to tune and tweak every parameter of the fuel maps, ignition timing, camshaft timing and other parameters for safety, maximum performance, and reliability.
Todd Zuccone – Evolution MotorSports Founder and director of EVOMSit software development, used an ECU emulator / EPROM simulator module to live tune the ECU on the dyno. This type of technology allows live tuning of the ECU for instant mapping changes as well as live monitoring of the various EPROM functions. This is the kind of thing usually seen in Europe, but fortunately, we have some great footage which we will be uploading soon.

This is the emulator connected to the GT3 ECU which gets run through a special program on the laptop, allowing instant changes to be made to the ECU during the tuning process while still installed in the car.