Lower, leaner and meaner RZR Pro N/A 1000 By the staff of Dirt Wheels

COLLIN TRUETT’S MAO/OUTLAW 2.0 RS1

Collin Truett won the 2020 Texas UTV Race Series Pro N/A 1000 Championship in an RS1 that short-course legend Johnny Greaves built, and he won the 2022 MidAmerica Outdoors Pro N/A 1000 Championship in the same RZR, but lost the Texas Outlaw Pro N/As to Honda’s Cross Kirchmeier. So, Truett decided to build an all-new RZR RS1 for the 2023 Texas and Oklahoma series. He had the new racer in time for MAO’s second round at Lucas OIl Speedway in Wheatland, Missouri, and Dirt Wheels got to check it out before he got it dirty in battle.

Truett had Jason Everhart of Chapel Hill, North Carolina, do the ground-up RS1 chassis work, which is lowered 8 inches compared to his old RS1 (his dad raced his old RS1 that weekend). Everhart fabricated the front end, dash, cage, door supports and skins, roof, nerf bars, torsion bar links, radius-rod plate, and bumpers. Jason also fabricated the Epic Everhart Performance RS1 A-arms with adjustable caster and camber. The Competition Series RZR 1000 arms are made of Tig-welded 4130 tubes with HD Heim joints and 17-4 stainless spindle pins. Jason Everhart raced Vet 40+ N/A at Wheatland in a similar RS1 and went 1-1.

Instead of the RS1’s WER needle shocks, Walker Evans Velocity shocks with Hyperco shock springs and Seal Saver protection are mated with the Epic A-arms and RS1 trailing arms. Hess Motorsports radius rods, 7075 T651 rear hubs ($200 each, $400 for chromoly) and billet-aluminum hub with bearing cartridge carriers ($600 each) beef up the rear end, and Truett depends on RCV axles and runs the stock RS1 front diff. Collin ran Hoosier SxS/UTV 27.5×8-15 M500-compound tires on Raceline Mamba A71B bead-lock wheels at Wheatland.

For power, Truett goes with Crower’s Pro N/A internal engine kit and a Jody Hickman/Team DFS tune with HP MPVI3 tuner, K&N intake with pre-filter and HMF exhaust. RCR Sandcraft motor mounts, bearing carrier and shafts transfer power to the RCV axles, and Collin’s Sparco EVO Racing seat sits on top of the prop shaft. This build is so low and light that Truett sits on a ballast plate (185 pounds total) for low center of gravity while making the 1650-pound minimum weight rule for the class. He and the RS1 weigh in at 1669 pounds. To meet the rules, he runs a Harmon Fuel Cell, and all fluids are Maxima, including coolant.

Collin runs a Shorai lithium-ion battery that weighs only 5 pounds, and the voltage regulator is attached to a door skin with a metal-mesh cooling screen. A larger radiator and oil cooler sit where the OEM RS1 cooling system used to, and his EPS power-steering unit is by ePowerSteering and mates to a Hess flat steering wheel ($90) and hub ($90). He uses a Hess EPS Over-ride switch ($80). He logs data and lap times with an Aim MX/UTV data logger with belt-temperature monitor (Hess has them for $599), and races with a Pyrotech helmet, UPR seat cushions, and Sparco driving suit, boots and socks. Truett is a MidAmerica Outdoors ambassador, and his RS1 has a Graphics Guys wrap.

CONTACTS:

Epic Everhart Performance: Chapel Hill, NC

Hess Motorsports: 202 N. Mesquite St. Muenster, TX 76252 (940) 759-4597 www.hess-motorsports.com

Walker Evans Racing: 2304 Fleetwood Drive Riverside, CA 92509 (951) 784-7223 www.walkerevansracing.com