Part 6: 2018 Ultimate Adventure Derange Rover

    Part 6: Applying the Torques With Cummins

    Verne SimonsPhotographer, Writer

    When is a crate engine not just a crate engine? When it comes with just about enough parts to run in said crate. Lots of folks dream about an engine swap, whether it be a junkyard LS swap or a fuel change to a turbodiesel for efficiency and torque. And while there are tons of options out there for vehicle repowers, for Ultimate Adventure 2017 we built a 1971 CJ-6 (The UACJ-6D) with what at the time was a preproduction Cummins R2.8 four-cylinder turbodiesel. It flat-out worked.

    Fast-forward a year and it was time to build another UA rig. The Cummins R2.8 was now a production crate engine, and Cummins was back as the Official Turbodiesel of the UA.

    Cummins builds engines for lots of companies, including big OEMs like Ram and Nissan, tractor companies, generator companies, big-rig companies, and RV coach builders, so you can bet that when Cummins decided to build a crate engine for auto enthusiasts to put in 4x4s (or, heck, any vehicle) the product would be affordable, reliable, easy to install, and figuratively polished. And as we alluded to, this “crate engine” is more than just a long-block ready for you to add thousands of dollars of accessories, fuel systems, tuning, sensors, and gauges. This thing is almost ready to go, and when it does it runs clean, makes torque.

    Ours has the newest R2.8 tune that retains the 161 hp of the UACJ-6D’s preproduction R2.8 but ups the torque from 267 lb-ft to 310. It’s a big difference you can feel since the torque curve is about as flat as a billiard table. Plus, the R2.8 comes with tons of parts, an owner’s manual, an installation guide, and a two-year warrantee from Cummins. Power, mileage, and guaranteed longevity, all for a reasonable price? Sign us up!

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