03-06 DODGE CUMMINS POWERMAXCR™ ADJ W/BUILT IN PYRO & BOOST GAUGES
TST has been running the PowerMaxCR (PMCR) since October \'02 and finally released it for sale in December of \'03 for the Cummins Common Rail Ram Diesel.
We have been testing stock Dodge common rail trucks since May \'02 and have had about a hundred different \'03, \'04, \'04.5, & \'05 Rams on our dyno, HO�s, Automatics, and one 5 speed California 235 hp version. Except for the California truck, we are seeing much better stock power to the ground than the previous engines.
The maximum power gains we've seen to date is an extra 190 whp (wheel horsepower) at 2900 rpm and an extra 580 pound-feet of torque at 1700 rpm. The only power upgrade was our plug-in computer, no wires to cut or Scotchlock. These numbers were obtained with the stock turbo (added a boost elbow to turn boost up to about 40 psi to help reduce exhaust gas temperature), stock exhaust, and stock air filter (enlarged the opening into the air filter box). We also had to install an aftermarket clutch as the stock clutch gave up at about 800 lb-ft. A pusher fuel pump was added in series with the stock lift pump when we went above 120 extra wheel horsepower as engine would miss without it.
We are advancing timing and extending the open time in the injector solenoid on the main injection pulse. We do not extend the pilot pulse and do NOT increase fuel rail pressure, which has been shown to damage the high pressure rail components. Most competitive computers currently turn up rail pressure and they are very limited to power and torque increases before reaching the rail pressure relief valve limit.
The PowerMaxCR has 10 power levels @ 2900 rpm and 10 torque levels @ 1600 rpm that are adjustable under power on the fly. Setting the power level and the torque level on zero turns truck power back to stock. Power level #1 advances timing only for good fuel mileage, reduced exhaust temperature, and adds about 30 wheel horsepower but does not add extra fuel. Power levels 2 thru 9 add increasing amounts of fuel and 20 horsepower per step at 2900 rpm. Each torque setting step adds 60 additional foot pounds of torque at 1600 rpm.