Improved performance of Scania DC16 118 650HP engine
Truck configuration, original power and other details
The truck in question is equipped with a Scania DC16 118 650HP engine, with a displacement of 16.4 liters, capable of delivering a maximum power of 650 hp (479 kW) at 1900 rpm and a maximum torque of 3300 Nm between 950 and 1350 rpm. This engine complies with Euro 6 emission standards. The gearbox used is a GRSO925R mechanical gearbox, the same as that used on the 730. The engine ECU is an EMD1, and the EGR valve system is not used. The truck is fitted with a fixed-geometry turbo for improved fuel efficiency, and an SCR aftertreatment system.
Optimization on R650, within standards and tolerances
Optimization on R650 consists in improving the performance of this Scania DC16 118 650HP. Our team of heavy vehicle programming engineers carried out a Stage 2 on this truck, with the aim of increasing power and torque while reducing fuel consumption. This optimization was made possible thanks to a free exhaust, which enabled us to develop a tailor-made program to maximize engine availability.
The DC16 118 is an engine that optimizes itself rather well. Its V8 allows significant gains by adjusting injection times, torque limiters, boost pressure, IAT (Intake Air Temperature), engine speed, turbo pressure, etc. The gearbox, as mentioned above, is the same as on the 730, and already handles 3500Nm as standard on the 730, and up to 4000Nm when we optimize. In our current configuration, as we wanted to remain 'soft', we deliberately limited the torque to 3800Nm.
All in all, no less than 780hp and 3800Nm of torque (as estimated by our calculations). As it turned out, our road test was very conclusive, with a totally different driving experience to that of the 650hp version.
Optimization of exhaust valve utilization
The possibility of using exhaust flaps on a truck can offer many advantages, not least in terms of sound. Truck enthusiasts can enjoy the characteristic sound of a V8 at rallies such as the 24 Hours of Le Mans trucks.
We have developed a solution for using exhaust flaps without displaying faults on the dashboard. We achieved this by reprogramming the EMS (EMD1) and modifying certain emission control parameters, such as NOx management and AdBlue injection.
Using this solution, when the switch is in the ON position, the CAN signals from the EEC3 emission control box are no longer sent, allowing the exhaust valves to be used without any fault display. However, when the switch is in the OFF position, the truck uses its original exhaust system and is fully compliant with current regulations.
Conclusion:
In conclusion, optimization on R650 and the use of a deactivatable SCR system are very attractive options for owners of trucks equipped with a Scania DC16 118 650HP engine. These improvements increase power, reduce fuel consumption, comply with emissions standards, offer greater flexibility and enhance the driving experience. These improvements are achieved in compliance with current standards, and with an easy and convenient tipping system.
