Engine designs must be submitted by an automobile manufacturer and meet Indy Racing League specifications. All engines must meet minimum weight and size requirements , must fit all Indy Racing chassis and be available to all teams at a set price. Flat, 180-degree crankshafts will be optional. But the new crankshaft and engine firing order will produce a more pleasing engine sound due to the timing of the exhaust pulses, enhancing the experience for spectators. The new engines have a shorter crankshaft stroke , which decreases piston speed by more than 150 feet per minute from the prior level.
Piston speed is a major factor in engine reliability.
Several engines have already run more than 400 miles on the track, and that verifies what we have seen in our successful dynamometer simulations of a 200-mile race at Walt Disney World Speedway. We are currently working hard on validating an engine specification for the 500-mile race at Indianapolis. Eddie Cheever Jr. is the sole campaigner of the Nissan Indy Infiniti engine, and Team Cheever and Nissan were equally pleased after the initial test of their 3.5-liter engine. 73 mm Approx. 64 mm Maximum Piston Speed Approx.