Recently, Hatfield Racing Engines put the wraps on their first ever Roush Yates RY 45 Super Late Model Engine. This engine while technically not considered a spread bore, exhibits even more traits than what was considered the top of the line, cutting edge, Late Model piece over the past few seasons.
Hatfield Racing Engines Co-Owner Tony Hatfield assembled the bullet and oversaw the entire process along the way. It pulled an outstanding 893 horse on the dyno, with 707 ft. lbs. of torque
"It's the best dyno numbers we've ever pulled in the history of our business," said Hatfield. "We've had some Chevrolet stuff close on total horsepower, but this thing is the real deal. It didn't go together like other engines we've produced. It's a little different than other combinations we've worked with."
Offered as a complete kit, Hatfield had some tried and true parts they just weren't comfortable doing without for the project. In the valve train portion of the engine they subbed for T&D Rocker Arms and a custom ground COMP Cams®camshaft. They also used their own custom billet valve covers and custom HRE plug wires.
"We just made small deviations based on our preferences," Hatfield continued. "The workmanship on this engine is second to none. It's very efficiently designed and the power and torque curves were excellent."
Roush Yates Performance Parts, now under the SRI Performance Parts and Supplies banner, spent over one million dollars to develop and refine this particular combination. The RY 45 is 433 Cubic Inches in size.
"We also took care of nearly all the machining in house. Although it's advertised as a kit, it's not ready to simply bolt together. Paul Beckham has worked for us for years and is outstanding when it comes to cylinder heads. He handled that part, while Joey Davis and Chris Wagner helped with machining and assembly. It was a group effort at the shop to pull this thing off, and our guys did a terrific job!"
Hatfield Racing Engines is now an authorized dealer for the RY 45 Engine Program and anticipates normal turnaround times in the 6 week range, given the parts are in stock or not on back order.