What is the compression ratio of a SC430?
The Lexus SC430's 4.3-liter V8 uses a compression ratio of 10.0:1.
The SC430 is a luxury grand tourer produced by Lexus from 2002 to 2010. Its engine, the 3UZ-FE 4.3-liter V8, is part of Lexus's UZ family and is designed for smooth, refined performance in a high-end coupe/convertible. The compression ratio is a fundamental specification that influences power, efficiency, and knock resistance. For the SC430’s naturally aspirated setup, 10.0:1 is the standard figure commonly cited across model years. While typically consistent, minor calibration differences by market or emissions tuning can lead to small variations, but the official spec remains 10.0:1.
Key specifications related to compression
The following core specs accompany the compression ratio and describe the engine's basic hardware and configuration.
- Engine code: 3UZ-FE
- Displacement: 4.3 L (4,327 cc)
- Configuration: V8, DOHC, 32 valves
- Induction: Sequential fuel injection with VVT-i
- Compression ratio: 10.0:1
These specifications together explain why the SC430's engine delivers smooth, high-rev performance appropriate for a luxury GT while maintaining reasonable fuel economy for its class.
Context and variations
Engine family: 3UZ-FE
The 3UZ-FE is Lexus's 4.3-liter V8 used in multiple models, including the SC430 and LS430. It features dual overhead cams, 32 valves, and Variable Valve Timing with intelligence (VVT-i) to balance performance with efficiency.
Why the compression ratio matters
Compression ratio measures how much the air–fuel mixture is compressed before ignition. A higher ratio improves thermal efficiency and torque but generally requires higher-octane fuel to prevent knocking. The 10.0:1 ratio chosen for the SC430's 3UZ-FE represents a balance between refined performance, reliability, and everyday usability for a luxury sports tourer.
Summary
In short, the official compression ratio for the Lexus SC430's 4.3-liter V8 is 10.0:1. This figure aligns with the 3UZ-FE engine family used in the SC430 and LS430, reflecting Lexus’s approach to delivering smooth, capable performance in a premium grand tourer.
How fast is a Lexus SC430 0 to 60?
1. All righty perfect all right so we did 0 to 60 in 6.65 seconds there it is uh 0 to 62 in 6.96 seconds 40 to 80 and 6.53 which is a great time and then the 1/8 mile is 9.63 at 76.25.
Is the Lexus SC430 rare?
The car is relatively rare. Almost 50% were year models 2002 and 2003.
What does SC stand for in Lexus SC 430?
Lexus SC. Aimed at targeting the mid-size luxury coupe market, the SC stood for Sports Coupe. It also has the unique distinction of being one of the few models produced by Lexus without an S or X at the end.
What is the engine specs of the Lexus SC 430?
The Lexus SC 430 features a 4.3-liter V8 engine (3UZ-FE) that produces 300 horsepower and 325 lb-ft of torque. It is a front-engine, rear-wheel-drive vehicle paired with a 5-speed automatic transmission and is capable of a 0-60 mph time of around 5.9 seconds.
Engine and performance
- Engine: 4.3-liter V8 (3UZ-FE)
- Horsepower: 300 hp @ 5600 RPM
- Torque: 325 lb-ft @ 3400 RPM
- Valvetrain: 32-valve DOHC with Variable Valve Timing with intelligence (VVT-i)
- Transmission: 5-speed automatic with Snow and Power modes
- Drivetrain: Rear-wheel drive
- 0-60 mph: Approximately 5.9 seconds
Engine features
Acoustic Control Induction System (ACIS), Electronic Throttle Control System with intelligence (ETCS-i), Sequential multi-port fuel injection, and Direct Ignition System (DIS).
Other specifications
- Fuel: Premium Unleaded recommended
- Curb weight: Approximately 3,840 lbs
