Doug Monroe’s Pro Street-Dominating, 24,000-Mile Third-Gen Puller
When it comes to truck pulling, Doug Monroe has just about seen it all. From the days when 600-700hp streetable pullers were still a thing to the mega-horsepower 2.5-inch map groove days to today’s fiercely-competitive smooth bore turbo world, his ’05 Dodge Ram 3500 has run the gamut. Within five years of driving his four-door common-rail off the dealer lot, Doug’s daily-driven, weekend puller was retired from the road and became a full-fledged, purpose-built puller. Now, the Indiana native has an unbelievably clean third-gen with just 24,000 miles on the clock. But more importantly, he’s campaigning one of the most dominant trucks in the 8,000-pound Pro Street Diesel Truck class.
Track-Tested 6.7L Cummins
Built four years ago, the 6.7L Cummins owes Doug nothing at this point. Still, the proven engine that’s lived its entire life on Amsoil’s Dominator racing oil continues to turn out four-digit horsepower in ultra-reliable fashion. The bottom end was prepped at Freedom Racing Engines, with a girdle and 14mm ARP main studs securing the factory-based crank that swings a set of Carrillo rods attached to QSB pistons. Both the block and head were machined to accept 14mm ARP head studs as well as fire-rings, and a Stage 3 cylinder head from D&J Precision Machine provided a substantial increase in airflow. As we went to press, Doug was on the fence about having the engine cracked open prior to the kick-off of the 2022 pulling season.
The Finest Fueling Available
Doug will be the first to admit that being in close contact with the movers and shakers in the diesel industry has its benefits. For him, that means anytime S&S Diesel Motorsport improves its common-rail injector and pump technology he’s privy to try it out on his engine. In his dominant 2021 journey, a pair of S&S’s 10mm stroker CP3’s supported a set of the company’s 400-percent over injectors. Backing up the dual high-pressure fuel pumps is a 250-gph FASS system that never skips a beat. Fine-tuning the injection system is left to Ben Shadday, owner of the lightning-fast, split-window AMSOIL Sponsored Pro Mod Corvette.
66mm Smooth Bore Turbo
In any air-limited pulling class, there is always a mad scramble to have the latest and greatest turbo technology. Things are no different in the category Doug competes in: the smooth bore Pro Street Diesel Truck class. However, somehow Doug has been able to hold off the competition for two whole seasons running a 2.6-inch smooth bore charger he obtained in early 2020. By truck pulling standards, even a year-old turbo can quickly be considered old-tech. Despite this, Doug’s third-gen held its own last year, with the competition just starting to close the gap on him in late 2021. His 2.6-inch smooth bore turbo came from Hart’s Diesel, hangs from a T6 flange Steed Speed manifold, and produces roughly 45-psi of boost going down track.
NV4500, Beefed Up AAM Axles, And A Proven Chassis
While the turbo and injector technology aboard Doug’s Dodge are cutting-edge, the transmission parked behind his Cummins is as old-school (yet proven) as it gets. The venerable NV4500 is equipped with a longer and larger (1-3/8-inch diameter) input shaft, a 4-disc Kenny’s Pulling Parts clutch, and a blowproof bellhousing. The rear AAM 1150 was narrowed at SunFire Off-Road and is fitted with custom axleshafts and a spool, while the factory AAM 925 benefits from Yukon chromoly axle shafts and an ARB air locker. All chassis, suspension, and hitch work was performed at E&M Repair And Fabrication, and Doug is adamant that E&M’s Erik Hucke came up with the perfect recipe for the truck’s always-settled front suspension.
The (Winning) Road Ahead
If you’ve seen Doug’s silver four-door Dodge loaded down with the sled in recent years, you’ve likely seen his truck go the furthest in the dirt. A big win at the 2020 Scheid Diesel Extravaganza, being front-runner at Diesels in Dark Corners, and winning every Battle of the Bluegrass event he went to last year are among his most recent successes. But although he’s regularly in the top three at any given event, Doug will be the first to tell you the road to the front wasn’t quick, or easy. “It was a lot of work, and I got beat a lot in order to get here,” he said. However, now that Doug is one of the most formidable competitors in 2.6 smooth bore, he has a plan for staying at the top. “Turbo and injector technology is the name of the game anymore. You gotta stay on top of it if you want to win.” With plans to go turbo shopping, see what’s new from S&S, and possibly even crack open the engine before summer hits, look for Doug to once again lead the pack in 2022.
The Shell Rotella Truck of the Month, presented by Shell Rotella