What engines is used in nascar

NASCAR race cars use naturally aspirated V8 engines that are specifically built to strict NASCAR regulations. Here are the key details:
Displacement: 358 cubic inches (about 5.86 liters)
Configuration: 90° V8, pushrod (overhead valve) design
Valves: 2 valves per cylinder (16 total), operated by a single camshaft in the block
Fuel: Since 2012, they run on Sunoco Green E15 (gasoline with 15% ethanol)
Fuel Delivery: Electronic fuel injection (EFI) since 2012 (before that, carburetors were used)
Power Output: Around 670–750 horsepower depending on the track and rules package (with tapered spacers used to reduce horsepower at superspeedways)
Rev Limit: NASCAR mandates a maximum of about 9,000 RPM
Manufacturers:
Currently, three engine manufacturers supply NASCAR Cup Series teams:
Chevrolet → ”Chevy R07” V8 (based on small-block Chevy architecture)
Ford → ”FR9” V8 (purpose-built NASCAR engine)
Toyota → ”TRD Camry” V8 (custom-built for stock car racing)
All of these engines share the same basic specs due to NASCAR’s regulations but differ in internal design and manufacturer tuning.
Would you like me to break down the differences between the Chevy, Ford, and Toyota NASCAR engines specifically?
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