The Maxxforce 11 and 13 will be available with Cummins SCR in International Prostar and Workstar trucks in April 2013, and in International Transtar and Paystar in May.
Navistar's planning was not yet complete at the time of the Utah boot camp, but they did not expect to introduce SCR versions of the Maxxforce DT, 9 and 10 until 2014. The Maxxforce 7 could wait until 2015 to get SCR.
"There is a slight bit of turbo lag that will be improved with this (recalibration of Maxxforce heavy duty engines to work with Cummins SCR)," said Shick. "That's kind of the dual goal of the calibration: to get 0.2 (grams of NOx per brake-hp hour), fuel economy is what it will be – we think we will continue to be a leader – and we think we can take that opportunity to improve performance a little bit even beyond what we have."
The Cummins ISX 15 (in three ratings between 455 and 500 hp and 1,650 and 1,850 ft. lbs. of torque) will be available in the International Prostar in January of 2013, in the International 9900 Series trucks on April 1, and in the Paystar in June.
Cummins power will also appear with the ISLg natural-gas-fueled engine in the International Transtar in January 2013, and as the standard engine in the Loadstar low-cab-over-engine refuse truck in July.