NASCAR engines are among the most advanced naturally aspirated V8 racing engines in the world. Built for extreme performance and durability, these engines power the NASCAR Cup Series stock cars at speeds exceeding 200 mph.
This guide explains NASCAR engine specifications, horsepower levels, oil capacity, maintenance requirements, and cost breakdown for modern Cup Series racing engines used by Chevrolet, Ford, and Toyota teams.
Overview of NASCAR Engine
NASCAR Cup Series engines are purpose-built 5.86L (358 cubic inch) naturally aspirated V8 engines. These engines are designed for high RPM performance, reliability, and controlled horsepower output under strict NASCAR regulations.
Unlike street engines, NASCAR engines are hand-built, sealed, and inspected by NASCAR officials to ensure equal performance across manufacturers.
NASCAR Engine Specifications
- Engine Type: 90° Pushrod V8
- Displacement: 5.86L (358 cubic inches)
- Horsepower: 670 HP (intermediate tracks), up to 750 HP (short tracks)
- Torque: ~520–550 lb-ft
- Redline: ~9,000 RPM
- Aspiration: Naturally Aspirated (No Turbo/Supercharger)
- Fuel System: Electronic Fuel Injection
NASCAR Horsepower Explained
NASCAR does not use a single fixed horsepower number. Power output varies depending on track type:
NASCAR Engine Oil Type & Capacity
NASCAR engines use a dry sump lubrication system designed for high G-forces and continuous high RPM operation.
Oil Capacity: Approximately 12–14 quarts (11.3–13.2 liters)
- Oil Type: High-performance 5W-30 or 10W-30 synthetic oil
- Oil System: Dry sump racing system
- Oil Filter: High-flow racing filter
NASCAR Engine Cost
NASCAR engines are extremely expensive due to their custom-built nature and precision engineering.
- Engine Cost (per unit): $150,000 – $225,000
- Season Usage: 30+ engines per team annually
- Total Annual Engine Budget: $6M – $8M+
NASCAR Engine Maintenance
- Engines are rebuilt after 1–2 races
- Oil is changed after every race session
- Strict NASCAR inspection after each build
- Precision balancing and dyno testing required
- Sealed engine components prevent modifications
Common NASCAR Engine Issues
Heat Stress
Extended high RPM racing can cause extreme engine heat buildup.
Component Fatigue
Valvetrain and piston wear occurs due to high RPM operation.
Fuel Restriction Limitations
Airflow restrictors limit horsepower on certain tracks for safety.
Frequently Asked Questions (FAQs)
What engine do NASCAR cars use?
NASCAR cars use a 5.86L (358ci) naturally aspirated pushrod V8 engine.
How much horsepower does a NASCAR engine produce?
Between 510 HP and 750 HP depending on the track type.
What oil does a NASCAR engine use?
High-performance synthetic 5W-30 or 10W-30 racing oil is used.
How much does a NASCAR engine cost?
Each engine costs approximately $150,000 to $225,000.
Final Thoughts
NASCAR engines are highly engineered racing machines designed for extreme durability and controlled performance. With strict regulations, high RPM limits, and expensive precision builds, they remain some of the most advanced V8 engines in motorsport.