Building a 450 Hp C4 Corvette: Recommended Camshaft and Intake Modifications

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The C4 Corvette, produced from 1984 to 1996, is a beloved model among car enthusiasts, particularly for its potential to be modified for increased performance. This article focuses on how to build a 450 horsepower C4 Corvette through recommended camshaft and intake modifications.

Understanding the C4 Corvette Engine

The C4 Corvette came equipped with a variety of engines over its production run. The most common engine options included:

  • 5.7L (350 cubic inches) V8 engine
  • LT1 engine (introduced in 1992)
  • LT4 engine (available in 1996)

To reach the 450 horsepower goal, modifications will primarily focus on the LT1 and LT4 engines, as they offer a solid foundation for performance upgrades.

Choosing the Right Camshaft

The camshaft is one of the most critical components in achieving higher horsepower. When selecting a camshaft for a 450 hp build, consider the following:

  • Duration: Look for a camshaft with a duration of around 224-230 degrees at 0.050” lift.
  • Lift: Aim for a lift of 0.550” to 0.600” for optimal airflow.
  • LSA (Lobe Separation Angle): A tighter LSA of 112-114 degrees can enhance throttle response.

Popular camshaft options include:

  • Comp Cams Xtreme Energy 54-454-11
  • Texas Speed TSP Stage 2 Cam
  • Brian Tooley Racing (BTR) Stage 3 Cam

Intake Modifications

The intake system plays a crucial role in the overall performance of your Corvette. Upgrading the intake manifold and throttle body can significantly improve airflow and horsepower. Here are some recommended modifications:

  • Intake Manifold: Consider upgrading to an aftermarket intake manifold like the Edelbrock Performer or the Holley EFI Manifold.
  • Throttle Body: A larger throttle body, around 75mm to 80mm, will improve airflow. Look for options from brands like AccuFab or FAST.
  • Air Filter: Upgrade to a high-flow air filter to ensure maximum airflow into the engine.

Supporting Modifications

In addition to the camshaft and intake modifications, several supporting upgrades will help you achieve and maintain 450 horsepower:

  • Exhaust System: Upgrade to a high-performance exhaust system to reduce back pressure. Consider long-tube headers and a cat-back exhaust.
  • Fuel System: Ensure your fuel injectors can support the increased power. Upgrading to 30 lb/hr or larger injectors is recommended.
  • ECU Tuning: A custom tune is essential after making these modifications to optimize performance and ensure reliability.

Conclusion

Building a 450 hp C4 Corvette is an exciting project that requires careful selection of components, particularly in camshaft and intake modifications. With the right parts and tuning, you can unlock the full potential of your Corvette and enjoy an exhilarating driving experience.