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The cars are currently powered by EFI V8 engines, since 2012, after 62 years using carburetion as engine fuel feed with compacted graphite iron blocks and pushrod valvetrains actuating two-valves per cylinder, and are limited to a 358 cubic inch (5.9-liter) displacement.
Cup Series teams are restricted in the number of engines they may use in a season (16 engines at minimum must last at least two race weekends), effectively a limit of 20 engines during the season. Changing either will result in starting in the rear of the field.
16 kwi 2024 · NASCAR engines are limited to 358 cubic inches ( 5.86 liters) of displacement. These power units maintain a traditional V8 configuration with an iron block, emphasizing durability and power. The engines produce a target horsepower ( HP) of up to 670 HP.
17 gru 2022 · NASCAR cars use 90-degree pushrod V8 engines, featuring 358 cubic inches (5.9 liters) of displacement. These engines come from 3 manufacturers – Chevrolet, Ford, and Toyota – and while they must follow strict specifications, there is also enough room for variation if they remain within the rules.
29 gru 2008 · NASCAR places strict limits, for instance, on how engine cylinders are bored -- that is, how they're made larger by removing material. NASCAR also requires teams to use blocks, cylinders and intake manifolds made from castings of approved manufacturers.
10 cze 2024 · Our engines must conform to strict NASCAR regulations, which dictate everything from displacement to component materials. A notable restriction is the iron block engine requirement, paired with aluminum cylinder heads.
27 wrz 2021 · Engine displacement: 5.86 L (358 cu in) pushrod (OHV) V8. Transmission: 4-speed manual H-pattern. Weight: 3,200 lb (1,451 kg) minimum without driver and fuel; 3,400 lb (1,542 kg) minimum with driver and fuel.
