It is easy to make 604 to 704, just adjust the zero value about 100mV Sometimes the pump faults and adds even more than 100 hp (tried that with a bus, went fast 150 km'h fast) also the V10 can be tuned to 1100-1200 easily, but you will have to change transmission about 3-4 times a year my verdict : worth it!!!!
You can get 25L / 100km out of one of these with a trailer. Atleast i was able to hauling 16-24t cargo. Lots of Torque to cover the fueleco... The best way to save fuel is to let it roll longer use the momentum you have. You see you are going downhill let the speed drop already (that way you already rolled 200-500m for free and you still have to go downhill.) My brakes lasted aprox 1.200.000km Modern trucks i cant get further than 26L/100km
