Forum Discussion
thomasmnile
Aug 07, 2019Explorer
rjstractor wrote:thomasmnile wrote:
Cummins may even have an uphill fight in the medium duty arena. I recall reading a fire apparatus manufacturer, was either Pierce or E ONE, is offering the Ford 6.7 L diesel in a custom pumper as an alternative to the Cummins engine options offered. Is the Ford engine less complex or less trouble prone from an emissions standpoint. Cost savings over a comparable displacement Cummins inline 6?
It's Pierce that is using the 6.7 PSD, and it did catch me by surprise a little. The ISB Cummins hasn't been really been used much in fire apparatus in recent years (at least not by Pierce) and time will tell if the 6.7 PSD works out. It may work out well for departments that want a lower cost apparatus in an area where they don't have a lot of hills. To be honest, one of these motors in a municipal fire pumper is a little like putting a Chrysler Pentastar V6 in a Ram 2500. Good power on paper, but way down on torque compared with more conventional offerings.
As far as cost, while I haven't talked to a Pierce engineer in a couple of years, I imagine the Ford package comes "pre-engineered" in terms of transmission (supplied by Ford), and emission systems. Rousch also has a big part of the engineering for that engine application. For any given engine application in fire apparatus, the apparatus manufacturer must do all the applicable engineering to use that motor, which is time consuming and expensive, especially with modern emission systems. Having the package ready to drop in probably saves them a lot of money compared with sourcing the 6.7 ISB from Cummins, mating it to an Allison transmission and engineering an emission system. Again, this is mostly conjecture on my part. Sorry for getting a "little in the weeds". :)
No sweat, 32 years of my life was spent in the fire service. Great job and good times. :B
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