Ready to roll with the chimneys soon!
The solution for your Scania R660 with free-exhaust system
After several months of study, we took action and removed an SCR (Adblue) and DPF (Fap) system from the latest Scania R660 to enable it to run (on closed roads or at rallies) with free exhaust. And yes! it's now possible. The generation 3 DC16122 block, which develops 660hp and 3300Nm of torque, holds no secrets for us.
How does the operation work?
Firstly, it involves reprogramming the EMS10 engine ECU on these vehicles. Data is emulated via direct connection to the ECU. Here, the secure gateways don't allow us (any more than on the 650) to intervene via the manufacturer's OBD socket. Never mind, we've got the solution, so you can enjoy the sound of the V8 in free-exhaust mode, and above all, WITHOUT ANY FAULT!
Reprogramming is carried out in 2 stages, the first of which involves retrieving the truck's data and all the engine mapping. The aim is to emulate all the parameters so that the system doesn't fail at the slightest valve opening.
Once the program has been "remodeled", we write it into the ECU's memory and carry out a few physical finalizations on the vehicle. Now it's time to test.
Switch-mounted, to activate at your convenience
As the aim is to remain within the law, it's perfectly possible to install the device on a switch. This allows you to drive your R660 in free-exhaust mode where authorized. To use a Scania R660 in free-exhaust mode, you need to install valves to divert the exhaust gases. Here's how it works:
- When you switch to free-running exhaust, your exhaust gases are diverted and no longer pass through the original exhaust circuit. This disrupts exhaust gas temperature sensors, NOx probes and all emission-related peripherals. The result is a fault on the dashboard indicating an engine malfunction, an exhaust gas problem and limited driving time before engine torque is restricted.
- There are 2 possible solutions: either you don't want to fit the exhaust valve, or you need to remove both particulate filter cartridges. When the adblue and fap systems are deactivated, regeneration and adblue consumption will be zero. The particulate filter (FAP/DPF) will clog up over time.
So for an ADBLUE AND FAP OFF solution on a Scania R660 without a switch, you need to remove the 2 FAP cartridges. Of course, you won't get a fault on the dashboard, but you're not legally allowed to use the truck on roads subject to European emissions legislation - that's another subject. - The second solution is to fit an exhaust valve with a line. For one thing, this makes a nicer sound on the R660, and for another, it keeps it legal. Opening the flaps will divert the exhaust gases. In this case, it's mandatory to deactivate both the adblue and the DPFS via the switch system. You can even leave the two FAP cartridges in the exhaust system. Please note that the switch must be in the ON position if you wish to use the valves, otherwise the truck will revert to its original configuration. However, if you wish to drive with the exhaust closed, using the original FAPs, then you must set the switch to OFF, which reactivates the entire Adblue/FAP emission and regeneration system.
Increased power? possible?
Of course, we didn't stop at removing the device so that you can drive your Scania R660 with free exhaust. Our engine optimizations also improve torque and power curves. The Scania 590 and 660 are twins in fact, and both enable you to go from 660hp to 750hp, combining reliability and power. Torque rises to 3550Nm.
