Photo ID: 105855 Date Shot Photo By Friday, March 4, 2016 Kevin Morgan Location Times Viewed BNSF Engine House Denver, CO 1351 (Add a Comment) Subdivision Railroad Yard Shots BNSF EMD is a little behind the curve in the "Tier 4" game. Starting January 1, 2015, railroads could only purchase engines that were EPA Tier-4 compliant. GE had production units rolling by late 2015. EMD had yet to roll out a prototype at that point. However, they now have four prototypes on the rails, two of which had been testing at the Transportation Technology Center east of Pueblo. BNSF brought them to Denver and, rumor has it they will head west on the Moffat next for some high altitude testing. Email Questions or Comments to the Webmaster or add a comment to the picture. Photo ID: 105856 Date Shot Photo By Friday, March 4, 2016 Kevin Morgan Location Times Viewed BNSF Engine House Denver, CO 1813 (Add a Comment) Subdivision Railroad Yard Shots Electro-Motive Division EMDX 1502 and 1503 sit near BNSF's Engine House along with EMD's test car. These units carry the designation "SD70ACe-T4" and they are the first Tier-4 compliant units produced by EMD. These are prototypes that are undergoing extensive testing by EMD. Email Questions or Comments to the Webmaster or add a comment to the picture. Photo ID: 105857 Date Shot Photo By Friday, March 4, 2016 Kevin Morgan Location Times Viewed BNSF Engine House Denver, CO 1880 (Add a Comment) Subdivision Railroad Yard Shots Electro-Motive Division Introducting the SD70ACe-T4. This is one of four prototypes for the first EPA Tier-4 compliant engine produced by EMD. While it looks essentially like an SD70ACe externally, internally it is an entirely different animal. A few things to note externally. First, EMD is bringing back the teardrop windshield. A welcome change for both crews and railfans alike. Next, note the new fabricated trucks. Last, the long hood is higher and "boxier" ahead of the radiator housing. Internally, the prime mover is brand new. Traditionally, EMD prime movers have been two-stroke and 16 cylinders. This new prime mover is four-stroke and 12 cylinders. It still generates the 4400 HP the SD70ACe generated. On top of it all, the demonstrator paint scheme looks darn nice, too! Email Questions or Comments to the Webmaster or add a comment to the picture. Photo ID: 105858 Date Shot Photo By Friday, March 4, 2016 Kevin Morgan Location Times Viewed BNSF Engine House Denver, CO 1670 (Add a Comment) Subdivision Railroad Yard Shots Electro-Motive Division For decades, EMD has used either SD## or GP## as the prefix for its models. It seems that EMD is reluctant to go to a three-digit number (e.g. SD100), so all their new units in the last 15 years (basically since the SD90) have been "SD70ACe" followed by a suffix. That continues with the latest unit, designated an SD70ACe-T4. As you probably guess, the "T4" stands for "Tier 4", and indicates the unit is EPA Tier-4 compliant. Email Questions or Comments to the Webmaster or add a comment to the picture.