And For The Encore… 4,461 HP

Josh McCormack strikes again. This time he and his fire-breathing third-gen made the trip to Diesel Days Truck Rodeo in Cedar City, Utah. There, and once again strapped to the Northwest Dyno Series SuperFlow, the same cast-iron block Cummins—a wet, deckplate engine backed by the same old 48RE packing the same WP Developments converter—made a 5,000-to-6,000 rpm sweep and produced an insane 4,461-rwhp. The corrected figures further separate Josh from the rest of the field in the dyno wars (the uncorrected number is 3,437 hp). For a bit of added drama, and similar to what happened at U.C.C., the driver side rear tire let loose at the tail end of the record-setting hit. Catch the video here.

Coming Soon

TSD’s Cummins-Powered Alumiduty

One seriously wild ride is being pieced together at Truck Source Diesel: ’20-’22 aluminum Super Duty body, full tube chassis, 4×4 with independent front suspension, Freedom-built Cummins with Fleece billet-aluminum block, water-to-air intercooler, TH400… According to TSD’s Chris Buhidar, a unique look and a favorable race weight are key objectives. “If we can make it light enough, it’ll be cool to keep the factory skins on it instead of having to go fiberglass.” If he and the TSD team’s calculations are correct, their F-250 should tip the scales at 3,650 pounds without driver. We think the aluminum body will definitely help the truck appeal to the masses.

The Dragster Field Expands

Daughter of Stainless Diesel’s John Gilbert, Brianna Gilbert, will be hopping behind the wheel of a dragster in 2026. The “Racing Realtor” will benefit from a Wagler-built Duramax, S&S Diesel Motorsport fueling, and one of Stainless Diesel’s 5-blade VGT’s. Mark Broviak of MTKB Racing will fine tune the ECM, Hot Shot’s Secret will provide all the fluids, and the rail will primarily compete in the Outlaw Diesel Super Series’ 5.70 Index class. Look for Brianna to form a friendly rivalry with Jayle Wagler, driver of the Duramax dragster that hit the scene in 2024 and that also took home the Top Diesel championship this season.

SPE Expands Development To Cover Duramax and Cummins Platforms

After more than a decade of developing some of the best products for the Power Stroke segment, Snyder Performance Engineering is branching out to engineer parts for the Duramax and Cummins platforms. In addition to the performance gains its parts will provide, expect SPE’s high-quality materials, first-rate attention to detail, and quick lead times to attract the attention of late-model Ram and GM owners as well as dealers. Immediate areas of focus for both the ’19-newer L5P Duramax and fifth-gen Cummins will include air intake, intercooler piping, fuel system, and hose upgrades. After that, expect SPE to develop replacement turbo options for both platforms.

In The Dirt

2,671 HP Through A Smooth Bore 3.6-inch Turbo

Horsepower numbers have always been relatively secretive in truck and tractor pulling. However, in recent years many pullers have divulged the kind of horsepower “ranges” typically seen in specific classes. For instance, anywhere from 1,500 to 1,700 hp is the norm in the Limited Pro Stock diesel truck field—a category that limits engines to a single, 3.0-inch smooth bore turbo. The horsepower range is considerably higher for the Pro Stock field, where a 3.6-inch smooth bore charger is allowed. Here, 2,200 to 2,400 hp figures are tossed around. Then there are the folks at Scheid Diesel. The company’s billet block and head, second-gen Cummins usually competes in the Super Stock class with a 5.0-inch single charger onboard (where it makes north of 3,000 hp), but on Saturday night driver, Brady Ingram, shared the fact that it squeezed a strain-gauge estimated 2,671 hp through its 3.6-inch turbo. As for the truck’s ground speed, boost and drive pressure, rpm, torque, EGT, and other parameters, it looks like that info is still (and understandably) being held close to the vest.

On The Dyno

High-Powered HEUI—Another Dinosaur Turns Out Big HP

Another 700hp 7.3L just pulled off the rollers at Jelibuilt Performance. This one, a solid front axle conversion, ‘97 F-250 owned by Hastings Foote, rocks a T4 turbo system with an S400, dual high-pressure oil pumps, and the 700hp-capable injectors that are required to go along with it. Already having gone 7.70s in the eighth-mile in the past, much bigger things appear to be in the works for the truck now. Hastings’ old-school Ford made the 200-mile trip to Jelibuilt’s North Carolina headquarters for some fine-tuning on the company’s DynoJet 224XLC. Thanks to Jelibuilt owner Brian Jelich’s mastery of Power Hungry Performance’s Minotaur tuning software, you can bet he left the Tar Heel State a happy camper.

Written by Mike McGlothlin