Truck Series champion Johnny Sauter and Spencer Gallagher took laps around Darlington Raceway on Tuesday shaking down the Ilmor Engines-designed power plant. The spec engine turned laps that were two-tenths faster than the current engine used by the Chevy team.

Ilmor currently provides spec engines for the ARCA series at a cost of about $40,000. The engines can run approximately 1,500 miles before needing to be rebuilt. Although there could be cost savings for the teams, the factory support to NASCAR’s top trucks would be trimmed considerably.

Although NASCAR hoped to offer teams the option to run the “Delta” engine in 2016, the rollout was delayed due to reliability issues with the Gibbs engines and a lack of support from the manufacturers. NASCAR is expected to meet with the truck teams next Tuesday in Charlotte to discuss the possible options for the engine. A second test is scheduled on Aug. 22 with teams representing each manufacturer.

Motorsport.com was told truck series director Brad Moran was unavailable for comment.