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Anatomy of a Mint 400 Unlimited Trophy Truck

With the upcoming 2020 Mint 400 coming up on March 3rd – 8th, we wanted to give you a quick look at what it takes to be competitive in their premier Unlimited Truck class.

The legendary Mint 400 was created by Norm Johnson in 1967, which was, at first, a publicity event to promote The Mint Hotel in Las Vegas. The race continues to bring together competitors from across the nation to test their skills and vehicles against rough terrain and fierce racers and has become known as The Great American Desert Race. The Mint was featured in Hunter S. Thompson’s novel “Fear and Loathing in Las Vegas,” as well as later in the cult classic film by the same name. It is the oldest and one of the most prestigious off-road races in America.

The Jimco “Maximus” Unlimited Trophy Truck

The distillation of more than 40 years of off-road experience has created the new Jimco “Maximus” Unlimited Trophy Truck. The pinnacle of off-road racing performance, the “Maximus” can take on the brutality of the desert at speeds excess of 145 mph, a feat that makes them truly the most remarkable vehicles on the planet. The Gen 3 Jimco “Maximus” features a complete re-engineered CAD verified chassis design. The platform is a perfect balance between technology and what actually works in the extremities of off-road battle, including the vehicle’s amazing suspension, 26” of wheel travel in the front and 34” in the back! Many technologies are implemented in off-road racing and most fail. The Maximus stays right on the cutting edge while still being extremely reliable. As the late off-road legend Rod Hall stated, “You must first finish to finish first!”

The Maximus platform features:

In the rear

The newly designed rear suspension geometry allows the truck to utilize the newest designs in shock technology. This allows Jimco to optimize the FOX 4.0 front and 4.4 rear, with full bypass technology to utilize the shock’s full potential – from full droop to full bump – while maintaining maximum travel and forward bite. Jimco works hand-in-hand with FOX Shox to develop new suspension technology.

In the front

The new Jimco also features the robust Howe Performance steering box, along with the Jimco-designed swing set with ram assist, which allows driver easier steering and control, less fatigue and proper Ackermann steering geometry.

In the front

Power vs weight was at the top of the list when considering every design aspect of this vehicle, right down to the 100-gallon carbon fiber fuel cell can. It’s a true evolution in off-road vehicle design, utilizing F1 vehicle design cues.The Maximus features a Custom Dougans Chevy Big Block V8 with 1015 Horsepower and 850 feet-pounds of torque. This custom power plant is specifically designed to handle the brutality of off-road racing, matching power with bulletproof reliability.

Fit and finish

The driver ergonomics have been significantly improved, Jimco owner Robbie Pierce’s background in proper seating for motorsports and military vehicles has seriously contributed to an improved driver compartment. The seats and restraints are Impact HS1s. Finished with the Momo mod 80 steering wheel.

Full Package

The Jimco Maximus chassis can easily be packaged with multiple types of power plants and transmissions. This is where Jimco shines; it’s not just about getting all the best components stuffed into a box, it’s about having a design that allows each component to work to its full potential and be serviceable – even in the middle of the night, in the middle of Baja during an all out war.

This truck seen here is the personal race vehicle of Jimco owner and Off-Road Motorsports Hall of Fame Inductee Robbie Pierce. He is the living embodiment of the idea, “We race what we sell.” The Jimco platform benefits from Robbie’s background in motorsport safety. As a member of ICMS (the International Council of Motorsports Science) Robbie uses the knowledge he has gained in making all Jimco vehicles the safest they can be. From properly positioned and mounted seats and restraints to fire suppressions systems, driver safety is always at the top of the list.  

Steel Sharpens Steel

This third generation Jimco unlimited trophy truck is an evolution of the previous platform that has been the only vehicle to win the brutal Mint 400 three times.

Owner: Robbie Pierce

Builder: Jimco

Date completed: March 3rd 2019

Chassis #: J30

Wheelbase: 125″

Track Width: 92″

Weight: 6100 lb

PWR: 6 x 1 – 0.166 hp/lb

Wheel Travel: Front: 26″ – Rear: 34″

Suspension: FOX 4.0 Front and 4.4 Rear Full Bypass Technology

Rear End: 4 Link

Steering: Howe Performance Steering Box

Jack System: Howe Performance Hydraulic Jack System 

Tires: 40″ Tall BFGoodrich KR3 Tires

Wheels: 17″ Trail Ready Beadlock Race Wheels

Brakes: Brembo Race Braking System

Body: Ford Raptor Custom Fiberglass

Seats: Impact Carbon Fiber HS1s

Nets & Belts: MasterCraft Safety Nets + Jimco Designed MOMO Camlock Restraints

Engine: Dougans Custom 555ci Big Block 8 Stack V8 Engine Package

Horsepower: 1015 hp

Torque: 850 ft lbs

Transmission: Fortin FRST5 Speed Sequential

ECU: MoTeC M130 engine management system

Cooling: C&R Racing 

Exhaust: Butler Headers, Borla Exhaust

Plumbing: Jimco – Brown & Miller

Driveline: J. E Reel

Fuel Cell: Custom Pyrotec

Paint/Graphics: Sign Pros/Long Live Design

Body: Jimco Raptor 

Steering: Howe/Jimco Steering box and Swing Set

Paneling: Jimco 

Wiring: TRH/JLM

Lights: Baja Design

Navigation:  Lowrance HDS 7” and 12” Live 

Communication: PCI Radio



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