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Autocross is a thrilling motorsport that tests both driver skill and vehicle performance in a timed competition on a defined course. For enthusiasts of the Subaru WRX and Mitsubishi Evo, the quest for the perfect track-ready build involves optimizing handling and power to dominate the competition. In this article, we will explore essential modifications to enhance both handling and power for these iconic vehicles.
Understanding Autocross
Autocross events are typically held on large paved areas such as parking lots or airstrips, where drivers navigate a course marked by cones. The goal is to complete the course in the shortest time possible while maintaining control. To excel in autocross, drivers must focus on several key aspects of their vehicles, including suspension setup, tire selection, and engine performance.
Key Modifications for WRX and Evo
Handling Mods
Improving handling is crucial for success in autocross. Both the WRX and Evo have strong chassis dynamics, but several modifications can further enhance their cornering capabilities.
- Suspension Upgrades: Upgrading to coilover suspension allows for adjustable ride height and damping, improving cornering stability.
- Anti-Roll Bars: Stiffer anti-roll bars reduce body roll during turns, enhancing responsiveness.
- Strut Braces: Installing front and rear strut braces increases chassis rigidity, providing better handling characteristics.
- Alignment Adjustments: Proper alignment settings, including camber and toe adjustments, can significantly improve tire contact and grip.
Tire Selection
The right tires can make a substantial difference in autocross performance. Choosing high-performance tires that provide excellent grip is essential.
- Summer Performance Tires: These tires offer superior grip in dry conditions, enhancing cornering speed.
- Competition Tires: Designed specifically for motorsport, these tires provide maximum grip but may wear quickly.
- Wheel Size: Opting for lightweight wheels can reduce unsprung weight, improving handling and acceleration.
Power Mods
While handling is critical, having adequate power can help you achieve faster times. Both the WRX and Evo are known for their turbocharged engines, and there are several modifications that can unlock additional horsepower.
Engine Tuning
Tuning the engine is one of the most effective ways to increase power output. This can be accomplished through various methods:
- ECU Remapping: A custom ECU tune can optimize fuel maps and boost levels for improved performance.
- Performance Exhaust Systems: Upgrading to a high-flow exhaust system reduces back pressure and enhances engine efficiency.
- Cold Air Intakes: These systems allow for better airflow into the engine, resulting in increased power.
- Intercooler Upgrades: A larger intercooler can help reduce intake temperatures, allowing for more aggressive tuning.
Forced Induction Enhancements
For those looking to push the limits even further, upgrading the turbocharger can yield significant power gains.
- Turbo Upgrades: A larger turbo can provide more airflow, resulting in higher horsepower.
- Boost Controllers: These devices allow for precise control of boost levels, enhancing performance.
- Fuel System Upgrades: Upgrading injectors and fuel pumps ensures adequate fuel delivery for higher power levels.
Safety Considerations
While performance is essential, safety should never be overlooked. As you modify your WRX or Evo for autocross, consider the following safety upgrades:
- Racing Seats: Installing racing seats with harnesses provides better support and safety during high-speed maneuvers.
- Roll Cages: A roll cage adds structural integrity and safety in the event of a rollover.
- Fire Extinguisher: Carrying a fire extinguisher is a smart safety measure for any motorsport event.
Conclusion
Building a track-ready WRX or Evo for autocross requires a balanced approach to handling and power modifications. By focusing on suspension upgrades, tire selection, engine tuning, and safety enhancements, drivers can create a competitive vehicle that excels on the autocross course. With the right modifications and a commitment to skill development, you can dominate the competition and enjoy the exhilarating experience of autocross.