DeMan in the USA have released more information on their 4.0L engine upgrade in this Rennlist thread.
http://rennlist.com/forum...-deman-motorsport.html
DeMan Motorsport 4.0L Engine Upgrade Package consists of 4.0L stroker kit, 82mm Throttle body, Fabspeed Headers and appropriate DeMan Motorsport custom tune using Pro tuning software by Cobb on our Dyna Pack dyno. With this specific setup, gains of 45+ horsepower and 36 ft/lb of Torque at the wheels over the stock car. The torque increase is vastly improved throughout and the 4.0 conversion is available for any 3.8L 981/991 based cars.
- Stock GT4 Grey #1 - Highest Stock (357.7whp / 303.8ft/lb) Average Stock (348whp / 299 ft/lb)
- GT4 Grey #1 with 4.0L stoker, 82mm throttle body, Fabspeed header, stock exhaust, DeMan Motorsport custom tune using Pro tuning software by Cobb - (403.1whp / 339.9ft/lb) The graphs below are labelled Fly Wheel Power/Torque but are Wheel Power/Torque.
http://rennlist.com/forum...-deman-motorsport.html
DeMan Motorsport 4.0L Engine Upgrade Package consists of 4.0L stroker kit, 82mm Throttle body, Fabspeed Headers and appropriate DeMan Motorsport custom tune using Pro tuning software by Cobb on our Dyna Pack dyno. With this specific setup, gains of 45+ horsepower and 36 ft/lb of Torque at the wheels over the stock car. The torque increase is vastly improved throughout and the 4.0 conversion is available for any 3.8L 981/991 based cars.
- Stock GT4 Grey #1 - Highest Stock (357.7whp / 303.8ft/lb) Average Stock (348whp / 299 ft/lb)
- GT4 Grey #1 with 4.0L stoker, 82mm throttle body, Fabspeed header, stock exhaust, DeMan Motorsport custom tune using Pro tuning software by Cobb - (403.1whp / 339.9ft/lb) The graphs below are labelled Fly Wheel Power/Torque but are Wheel Power/Torque.
![DeMan%204.0L%20GT4%20Dyno.jpg](http://i1076.photobucket.com/albums/w446/ralphpix/DeMan%204.0L%20GT4%20Dyno.jpg)