2016 Titan XD Cummins- TFL

spud1957 wrote:
What fuel pump does it have?

CP 4.2. I'm betting the reason why all current consumer diesels are running this pump (save for the 6.7 Cummins) is because they need the higher injection pressures to achieve finer atomization to meet emissions specs.

However, the most likely reason why the Cummins 6.7 can get away with the CP3 is because they probably built up plenty of emissions credits by pretty much meeting 2010 emissions back in 2007 and are now making use of those credits to keep producing the current engines we have. The peak pressure for a cp3 is like 23,000 psi versus the CP4 achieving 28 or 29,000 psi. I also think the emissions of the CP3 fueled Cummins 6.7 isn't that far off from 2010 EPA mandates (or maybe it's actually dead on in meeting them), so they can spread that credit over a large number of engines (if they're indeed using credits).

With the ISV, Cummins never had the opportunity to build emissions credits, so they have to meet all emissions specs today.