af347763___Inc____SCR___Facts_about_SCR__THE_TRUTH
[COMPETITOR RELEASED MYTHS] MYTH: The big, complicated SCR system will add a huge amount of weight to the bus. [THE TRUTH] 
FACT: Even with 10 gallons of DEF on board, we’ll weigh the same as, if not less than, our competitor. A leading proponent of Exhaust Gas Recirculation (EGR) claims that there is no payload penalty with its system, but our math suggests otherwise. The Cummins ISB, the engine used on the vast majority of Blue Bird’s buses, weighs 1150 pounds. The Diesel Particulate Filter adds an additional 50 pounds and the SCR system weighs about 250 pounds, including 10 gallons of DEF. According to our calculations, Blue Bird buses with the SCR system come out weighing the same as, if not less than, our competitor.* Some have tried to position EGR as a simple solution, but what you may not have heard is that EGR will require the addition of a bigger radiator package and other hardware changes. Cummins engines will remain similar to the ones you already know, so there’ll be no need for costly, time-consuming additional training. With SCR, you can anticipate a smooth, easy transition. Together, Blue Bird and Cummins will continue to provide reliability, low maintenance, safe operation and the lowest total cost of ownership. *Blue Bird buses with the Cummins ISC engine weigh 1630 pounds, plus 50 for the DPF. The ISC is selected by a small portion of Blue Bird customers who prefer a larger engine.
Cardinal Bus Sales & Service, Inc. - SCR - Facts about SCR
THE TRUTH