The latest technological frontier: Jordan Pellegrino # 98 Ultra4

This is a cutting edge Unlimited Class Ultra4 car designed by Triton Engineering and finish assembled by GenRight Off Road. It is independent suspension front & rear with portal boxes that give this car 4.5" more ground clearance than a standard IFS car. It is basically a 800HP Razor. Scroll down to see more about this amazing car.

Photography and story by Paolo Baraldi

jordan pellegrino genright offroad king of the hammers

King of the Hammers and more generally Ultra4 Racing are a real technological laboratory where new solutions are continuously developed to improve the performance of the Unlimited 4400 class vehicles. From my first King of the Hammers in 2011 to today, this innovation is been evident. Companies and teams have given their know-how, experience and technological evolution to the bottom to create ever more powerful, fast, agile and perfectly rideable prototypes in the desert and along the hard trails of Johnson Valley.

Let's get to know Jordan Pellegrino's car better

Last year, Jordan Pellegrino, Tony Pellegrino's youngest son, brought his new 800-horsepower 4-wheel independent prototype with portal boxes to the race. This year, from the experience gained with this car at the King of the Hammers 2019, Jordan, Tony and the whole Genright Off Road crew have made important updates to the vehicle, especially in the suspension, to make it even more performing.

jordan pellegrino genright offroad king of the hammers

This year, before qualifying, I decided to stop in Genright's pit to shoot Jordan's car and discover its secrets. In detail, it is a cutting edge Ultra4 Class Unlimited car designed by Triton Engineering and finished / assembled by GenRight Off Road in January 2019. Jordan Pellegrino's # 98 car has a 795 horsepower RHS Tall Block engine. The front and rear suspensions, one of the most interesting aspects, are independent with Fox Coil Over 3.0 "x14" IBP shock absorbers (with internal bypass) and Fox 2.5 "x 14" Coil Over rear shocks combined with 3.0 "x14” Fox Bypass. Very interesting are the portal box which, compared to all other types of IFS and IRS car, offer a ground clearance greater than 4.5".

jordan pellegrino genright offroad king of the hammers

Jordan Pellegrino’s car specsheet



Frame / Chassis Design: Triton Engineering front engine Ultra4 chassis with 4 wheel independent suspension

Frame / Chassis Materials: Chromoly steel

Cage / Cage Material: 1.75" Chromoly Tubing

Overall Wheelbase: 116"

Overall Length: 183"

Belly Pan Clearance: 20"

Overall Height: 65"

Wheel Track Width: 88"

Overall Weight: 4290



Front Suspension / Type / Materials: A-Arm type with Chromoly Upright

Front Shocks: Single FOX 3.0" x 14" IBP (Internal Bypass) Coil Over per side

Front Bump Stops: Internal in shocks

Front Differential / Locker: Aluminum Tubeworks Diff housings with air activated locker and water cooled

Front Ring & Pinion / ratio: Ford style 10" gears, 3.89 ratio

Front Axle Shafts: RCV 35 spline

Front U-Joints: RCV 934 series

Front Drive Flanges / Hubs: 74 Weld portal boxes with 1.55 ratio gears in them, 6 on 5.5 bolt pattern with 5/8" studs

Front Brakes: R1 Concepts Big Brake Kit with 14" Rotors and Billet 4 Piston Calipers

Front Steering Setup: Howe rack & pinion steering with Ram Assist

Front Driveshaft: JE Reel with 930 CV and 1350 U-joint at T-case

Rear Suspension / Type / Materials: Trailing arm type, Heat Treated Chromoly

Rear Shocks: FOX 2.5" x 14" Coil Over

Rear Bump Stops: FOX 3.0" x 14" 5 Tube Bypass Shock

Rear Differential / Locker: Aluminum Tubeworks Diff housings with spool and oil cooled

Rear Ring & Pinion / Ratio: Ford style 10" gears, 3.89 ratio

Rear Axle Shafts: RCV 35 spline

Rear U-Joints: Fortin 934 CV's

Rear Drive Flanges: 74 Weld portal boxes with 1.55 ratio gears in them, 6 on 5.5 bolt pattern with 5/8" studs

Rear Brakes: R1 Concepts Big Brakes with 13.6" Rotors and Billet Machined 4 Piston Calipers

Rear Driveshaft: JE Reel thick wall 2" diameter with 1350 U-joints

Tire Make / Size: Mickey Thompson Baja BOSS 40 x 13.50 x 17"

Wheel Make / Size / Bolt Pattern: KMC Machete FORGED 17 x 8" w/aluminum bead lock rings



Engine Make: Custom Built RHS Tall Block, dry sump

Engine Displacement: 454 cu/in (bored and stroked)

Engine TQ: 705 ft/lbs @ 5800 rpm

Engine HP: 795 @ 6200 rpm (on pump gas)

Engine Induction: Naturally aspirated fuel injection through eight RC brand "wet" injectors

Engine Modifications: Motec M84 ECU, SCAT forged crank and Carillo rods, Custom CP forged pistons, All Pro LS Heads, Custom Ground Comp Cam, T&D Rockers

Batteries: Dual Odyssey 1500 batteries in the rear

Radiator / Fans: Griffin custom 4 core with two 16" Spal fans

Air Intake: FAST 102 Manifold, Throttle body & K&N Air Filter

Exhaust:  Custom built tri Y headers into a 4" stainless steel Magnaflow muffler

Transmission Make: RDE built Turbo 400, full manual valve body

Transmission Adapters: Advanced Adapters

Transmission Cooling System: Griffin large Universal cooler with Spal fan the seats

Torque Converter: Coan brand Billet converter, 4500 stall

Transmission Shifter: Art Carr 3 speed gate shift

Transfer Case(s): Atlas 3:1

Fuel Containment: Fuel Safe 40 gallon bladder type fuel cell with dual Aeromotive A1000 fuel pumps, filters and regulator


Body / Interior           

Body / Body Panels: Custom aluminum panels

Skid plate / Material: Completely FLAT 7075-T6 Aluminum belly skid

Painter Name: DH Graphics did the Jami Pellegrino designed wrap

Hood / Grille: firmed aluminum with functional scoop and side vents

Floors / Firewalls: Sheet aluminum

Dash / Gauges / Switches: GenRight Custom Aluminum, Motec C125 digital color display and custom AWH brand harness

Steering Column / Wheel: Sweet brand quick release, PRP steering wheel

Pedal Assembly / Cutting Brakes: CNC brand pedals and master cylinders

Seats / Harnesses: Sparco brand bucket seats on custom GenRight seat mounts

Electronics: Lowrance 8" GPS unit, 60 watt Rugged Race Radio & 2 person Intercom

Lights Interior / Exterior: VisionX UNITE LED light bar, 6.7" VisionX ADV series lights on bumper and 12" VisionX Shocker light bar on winch fairlead. VisionX rock lights

Safety - Fire Extinguisher: Scosche billet aluminum fire extinguisher mounts

Winches - Front / Rear: Warn 9.0RC with in dash controls

Extras: Scosche billet aluminum side mirrors, PRP rear tire strap, VisionX LED rear Chaser light bar, Dual Fuel Safe quick fill (takes 11 gallons per side in 20 seconds), PRP Window nets, PRP 5 point harnesses, Rugged Radios Mac Driver / Co-driver Pumper unit