In a year-long endeavor fueled by passion and determination, Lingenfelter Performance Engineering (LPE) embarked on a challenging mission to bring the legendary 427 badge back to the Corvette. The project encountered numerous hurdles, yet the LPE team persevered with a singular goal in mind. This new engine package will be offered through the Lingenfelter Eliminator program as a Spec S engine combination.
The new Lingenfelter Eliminator Spec S 427 cubic inch LT2 was developed entirely in-house. The entire team at LPE took their decades of engine building and development experience to create solutions to obstacles that are unique to the C8 Corvette platform. The result is a naturally aspirated 7.0-liter LT2 that has good street manners with enough power to make any drive exciting.
The task at hand was not without its complexities, chiefly due to the mid-engine layout of the C8 and its new for the platform dual-clutch transmission (DCT). LPE COO/VP Operations, Mark Rapson, informed us this project demanded a new approach to engine program development for the Lingenfelter team, beginning with the Corvette’s new LT2 engine as the foundation. The LT2, tailored specifically for the Corvette platform, boasts unique design elements internally and externally to accommodate its mid-engine configuration and performance demands.
The Eliminator Spec S 427 LT is filled with high-quality components from Callies and MAHLE.
According to Rapson, one of the primary challenges arose from the LT2’s oiling system and flush-mount oil pan, specifically engineered by GM to make the LT2 and the C8 Corvette a truly track capable package. The oiling system features an all-new scavenging and scraper design that is integrated into the oil pan. Retaining this system was one of the key goals of the LPE 427 engine program.
To reach the desired cubic inch size of 427 LPE worked with Callies to develop a 4.00-inch stroke crankshaft that works with the LT2’s flat oil pan and oiling system.
To achieve the desired 7.0-liter displacement, modifications to both bore and stroke were necessary. However, considerations extended beyond the engine itself, encompassing critical components such as the vehicle management system and transmission control module. Factors such as shift RPM limitations, idle smoothness, torque delivery, and fuel octane requirements were analyzed to ensure optimal performance and drivability.
The chosen bore and stroke configuration, featuring a long-stroke…
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