New Hudson, MI- Pratt & Miller Engineering and Motus are testing a turn-key engine swap kit for the popular RZR® XP1000 side-by-side.The first completed vehicle is headed to Glamis in California’s Imperial Sand Dunes for initial testing and promotion. Built for extreme performance, the MV4-ZR Crate Engine Kit offers over 60% more power than the stock engine and 25% more power than anything in the current RZR® line-up.
“We are really excited about the big performance gains seen after installing the American V4”, commented Lynn Bishop, VP Engineering Services at Pratt & Miller Engineering. “The stock engine is great for many drivers, but the added power is a game changer in terms of hole-shots and acceleration out of turns. And, it has a visceral, American muscle sound that really sets it apart.”
Testing is underway to validate the durability of components in a wide range of driving conditions. Once Motus and Pratt & Miller are satisfied with the final package and the bill of materials is finalized, pricing and availability will be announced. All MV4-ZR Crate Engine kits will be installed by factory-trained American V4 installers or dealers being sought now.
“Swapping the 110 hp stock engine for a 180 hp American V4 changes your XP1000 into a serious hot rod, so it has to be done right. The MV4-ZR turn-key engine swap kit will come with everything needed for professional installation by a factory-trained technician, either at a participating Motus dealer or a quality local SxS dealer/shop.” said Brian Case, Design Director, Motus.
The MV4-ZR project will come as no surprise to those familiar with Motus and Pratt & Miller. When first developing the MST-series of comfortable American sportbikes, Motus enlisted Pratt & Miller for complex engineering, fabrication and durability testing. Pratt & Miller is in the unique position of offering sophisticated program management to coordinate design, engineering, fabrication, and durability testing- all in-house- which guarantees efficiency and success of complex projects. So, when Motus decided to re-power the RZR®, Pratt & Miller was the obvious partner.
In addition to developing off-road vehicles for major defense contractors, Pratt & Miller has ten ALMS manufacturer’s championships, nine driver’s titles and eight class victories at the 24 Hours of Le Mans, the world’s biggest sports car race. In 2015, Corvette Racing secured the endurance “Triple Crown” by winning all three major endurance races (24 Hour of Le Mans, 12 Hours of Sebring, and the 24 Hours of Daytona).
“There isn’t anyone with more proven success building bullet-proof, high performance vehicles than Pratt & Miller”, said Brian Case, Motus Design Director. “24 hour endurance racing requires extreme durability and Pratt & Miller has shown over and over that their design, engineering, fabrication, and testing capabilities are truly second-to-none.”
The project goal was to dramatically increase powertrain performance of the RZR® XP1000 with as little modification to the chassis or other components as possible. Pratt & Miller started with a stock 2015 XP1000 and designed everything needed to re-power it with the Motus MV4 “Baby Block” engine, leaving as much stock as possible.
- Chassis – 2015 Polaris® RZR® XP1000 EPS
- Engine – Motus V4 Baby Block®, naturally aspirated
- Engine swap kit – Pratt & Miller Engineering
- Gearbox – Stock
- Clutch – STM
- Exhaust – Pratt & Miller Engineering
- Intake – Pratt & Miller Engineering
- Wheels – Stock
- Tires – Stock
- Suspension – Stock
- Graphics – Competition Graphics
- Safety Harness – PRP 5.3
- overhead valves, pushrods
- chain driven cam-in-block
- hydraulic valvetrain
- closed loop fuel injection with electronic throttle control
- 180 bhp, 123+ ft. lbs torque, naturally aspirated
- 140 lbs weight