I. Relatively Inexpensive & Easy Modifications:
* Cold Air Intake (CAI): A CAI replaces the restrictive factory air intake system with one that allows for better airflow to the engine. This provides a small horsepower and torque increase, along with a potentially improved throttle response. Expect modest gains.
* Performance Exhaust System: Replacing the restrictive factory exhaust system with a performance exhaust (headers, cat-back system, or a combination) allows for better exhaust flow. This can improve horsepower, torque, and fuel efficiency (marginally). Note that some areas have strict emissions regulations, so check your local laws before making this change.
* Performance Tune (Chip/Programmer): A performance tune adjusts the engine's computer parameters to optimize fuel delivery and ignition timing. This can yield significant gains in horsepower and torque, but a poorly done tune can damage your engine. Only use reputable tuners and ensure the tune is compatible with your specific modifications.
* Lightweight Wheels and Tires: Reducing unsprung weight (the weight of the wheels, tires, brakes, etc.) improves acceleration and handling. Lighter wheels and performance tires will provide a noticeable improvement, but this can be a relatively expensive upgrade.
II. More Involved & Expensive Modifications:
* Supercharger or Turbocharger: Adding forced induction (a supercharger or turbocharger) significantly increases horsepower and torque. This is a major undertaking, requiring significant mechanical knowledge or professional installation. It's also the most expensive option.
* Engine Modifications: Internal engine modifications such as porting and polishing the cylinder heads, installing performance camshafts, or upgrading pistons and connecting rods can substantially increase horsepower. This requires considerable mechanical expertise and is best left to professionals. It's also expensive and can void warranties.
* Transmission Upgrades: A high-performance transmission or torque converter can improve shifting and allow the engine's power to be used more effectively. This is a significant undertaking that requires specialized knowledge and tools.
* Suspension and Handling Upgrades: While not directly increasing speed in a straight line, improved suspension and handling allow for better acceleration out of corners and improved overall driving experience.
Important Considerations:
* Reliability: Aggressive modifications can compromise the engine's reliability if not done correctly.
* Emissions: Some modifications may not be street legal in your area.
* Cost: The cost of modifications can vary drastically depending on the complexity and quality of the parts.
* Warranty: Modifications can void your vehicle's warranty.
Recommendation:
For a relatively inexpensive and straightforward improvement, start with a CAI and a performance exhaust system. A proper tune optimized for these modifications will maximize the gains. If you want significantly more power, forced induction (supercharger or turbocharger) is the most effective route, but it comes with a significantly higher price tag and complexity. Always prioritize professional installation for major modifications to avoid potential damage to your vehicle.
