Welcome to the EV Autocross Megathread, your one-stop resource for everything related to autocross and electric vehicles! Whether you’re a seasoned racer, transitioning from ICE vehicles, or brand new to motorsports, this thread is designed to provide you with all the information, tips, and community support you need to thrive in the world of EV autocross.
Note: This information has been compiled with the help of AI. It’s a good starting point, but to get the most out of this thread, you really want to jump into the related discussions.
Jump to a section:
1. Introduction
2. Getting Started in EV Autocross
3. Preparing Your EV for Autocross
4. Driving Techniques for EVs in Autocross
5. Comparing EVs vs. ICE Vehicles in Autocross
6. Equipment and Gear
7. Event Best Practices
8. Resources
9. Help Us Improve This Megathread
1. Introduction
Autocross is one of the most accessible and exciting ways to get into motorsports. It’s a timed competition where drivers navigate a short, technical course laid out with cones, often in a parking lot or similar open area. It emphasizes skill, precision, and vehicle control over outright speed, making it an ideal entry point for newcomers while remaining a thrilling challenge for experienced drivers.
In the UK and Europe, “autocross” represents a very different competition format. The closest equivalent to the US flavor of autocross is called “autosolo” or “autotest” or “autoslalom.”
For EV enthusiasts, autocross presents unique opportunities to showcase the benefits of electrification, including instant torque, low center of gravity, and cutting-edge technology. It’s also a fantastic platform to experiment, learn, and push the limits of your EV in a safe, controlled environment.
This thread will guide you through every aspect of EV autocross—from getting started and preparing your vehicle to mastering driving techniques and sharing your results. Along the way, we’ll highlight tips, gear recommendations, and resources to make your journey smooth and enjoyable.
We encourage you to participate actively: share your experiences, ask questions, and help build a supportive community of EV racers. Let’s drive the future of motorsports together, one cone at a time!
2. Getting Started in EV Autocross
Getting started in autocross with your EV is easier than you might think! With a few simple steps, you can join a local event, test your skills, and experience the thrill of navigating a challenging course. Here’s how to get rolling:
2.1 Find Local Events and Clubs
- Search Online: Look for autocross events in your area using platforms like the Sports Car Club of America (SCCA) website or local motorsport forums. Many regions have active clubs hosting regular events.
- Join Social Media Groups: Check out Facebook groups or other social networks for local autocross communities. These groups often share event details, photos, and advice.
- Visit EV-Specific Forums: Many EV owners share autocross opportunities tailored for electric vehicles, making it easier to connect with others in your area.
Be sure to check out section 8.2 Autocross Event and Racing Organizations.
2.2 Find Your Class
Autocross events typically divide participants into classes to ensure fair competition among drivers with similar vehicles and skill levels. Understanding the basics of autocross classes is key for first-timers when registering.
Here’s a quick overview to get you started:
- Novice Classes: Many events offer a specific “Novice” class for first-timers. These classes group newcomers together, regardless of vehicle type, and often provide additional guidance, such as walk-throughs and instructor rides. If you’re a first-timer or otherwise still eligible, do yourself a favor a just register in the Novice class.
- EV-Specific Classes: Some events or organizations have introduced EV-specific classes, generally grouping electric vehicles together. This is ideal for participants with popular modifications for EV street cars, or who otherwise want to focus on competing against other EVs.
- Street Classes: If you’re not eligible for a Novice class or don’t want to jump into an EV-specific class, the Street classes are for completely stock or lightly modified vehicles. They prioritize driver skill over vehicle modifications, making them a great entry point for new autocrossers, as well as tight competition among experienced racers.
- Examples: SCCA’s “Street” classes (e.g., GS for small EVs like the Mini Cooper SE, and DS for cars like the Tesla Model 3 Standard).
- Prepared/Modified Classes: These classes allow significant modifications, including suspension upgrades, weight reductions, and powertrain enhancements. They’re aimed at experienced racers or those with extensively tuned vehicles.
- Examples: A Tesla Model S Plaid with extensive aftermarket suspension upgrades might fit here.
- Open Classes: These are broader categories where vehicles of all types can compete. While exciting, open classes may be less ideal for first-timers as they often attract highly experienced drivers.
2.3 Registration and Preparation Checklist
- Sign Up Early: Popular events can fill up quickly, so register as soon as possible. Most clubs offer online registration and list event rules and fees.
- Check Requirements: Ensure your EV meets the event’s technical requirements. This usually includes working safety features such as seat belts or harnesses, being mechanically safe, with no loose or damaged parts, and having a secured interior.
- Get Your Gear Ready: At minimum, you’ll need a DOT-approved helmet. If this is your first event and you’re not ready to invest in your helmet, some clubs have loaner helmets you can borrow.
- Pack the Essentials:
- Identification
- Tire pressure gauge.
- Portable air compressor.
- Water and snacks.
- Charging equipment (if charging stations are available nearby).
2.4 Understand the Event Structure
- Morning Check-In: Arrive early to check in, pass the vehicle tech inspection, and walk the course. The course walk is crucial for memorizing the layout and planning your driving line before driving your EV at speed (with adrenaline at full blast.)
- Novice Walk: Some events will provide a guided course walk specifically for first-timers and other novices, led by an instructor or experienced autocrosser.
- Driver’s Meeting: Pay close attention during the meeting to understand event rules, safety guidelines, and course specifics.
- Run Groups: Events are typically divided into run groups. While one group drives, another works the course (resetting cones, ensuring safety).
- Lap Times: Each participant usually gets 3-5 timed runs. The best time counts, so focus on consistency and avoiding penalties such as driving off the course (DNF) or hitting cones (which typically add +2 seconds to your lap time.)
2.5 What to Expect at an Autocross Event
- Friendly Atmosphere: Autocross events are known for their welcoming and supportive communities. Don’t hesitate to ask questions or seek advice.
- Low Commitment: Events are typically single-day affairs, requiring minimal time and cost compared to other motorsport formats.
- Rapid Learning: You’ll quickly improve as you gain confidence and adapt to the unique challenges of autocross courses.
With a little preparation and a willingness to learn, you’ll be ready to experience the thrill of autocross and discover what your EV can do. Your first event is just the beginning—get ready to have fun, make new friends, and hone your driving skills!
As one experienced driver told me at my first event: “Autocross is the most fun you can have with your clothes on!”
3. Preparing Your EV for Autocross
Most EVs are capable of performing well in autocross straight from the factory, optimizing your vehicle for this motorsport can enhance its handling, performance, and overall experience. Here’s how to adapt your EV for autocross:
3.1 Tire Selection and Recommendations
- Performance Tires Matter: Tires are the single most significant factor in your car’s autocross performance. High-performance summer tires or autocross and competition-focused tires (200 treadwear or higher) provide exceptional grip and responsiveness.
- Tire Pressure: Experiment with tire pressures to find the ideal balance between grip and handling. Start with the manufacturer’s recommended pressures and adjust slightly higher or lower based on track conditions.
- Your tire pressures will rise during and between laps. Be sure not to exceed your tire’s posted limit to avoid damaging them.
- Monitor Tire Wear: Autocross is hard on tires. Before and after events, inspect them regularly for wear patterns or damage. Uneven wear might indicate the need for adjustments in alignment or driving technique.
3.2 Suspension and Alignment Tips
- Alignment Adjustments: Slightly more aggressive alignment settings can improve cornering grip. Common changes include increasing negative camber and dialing in a bit of toe-out for sharper turn-in response.
- Upgraded Suspension Components: If you plan to autocross regularly, consider stiffer springs or adjustable coilovers to reduce body roll and improve stability during hard cornering.
- Important: Check the rules for your class to avoid making a modification that could inadvertently bump you into another class.
- Anti-Roll Bars: Upgrading your anti-roll bars can fine-tune your car’s balance and reduce understeer or oversteer tendencies.
- Again, check the rules for your class before modifying your EV.
3.3 Battery Management
- Pre-Race Charging: Ensure your battery is sufficiently charged before the event. Most autocross courses are short, so range isn’t a concern, but a full battery ensures peak performance.
- Thermal Management: EVs can generate heat during repeated runs. Familiarize yourself with your car’s thermal limits and consider cooling periods between runs if necessary. Some EVs allow manual cooling features—use them strategically.
- Energy Recovery Settings: Adjust regenerative braking to match the course. Some drivers prefer higher regen for tight, technical layouts, while others opt for lower regen for more control and predictability in handling.
3.4 Software and Performance Tweaks
- Driving Modes: Explore your vehicle’s performance or sport mode for improved throttle response and traction control settings optimized for dynamic driving.
- Traction Control Settings: Depending on your skill level and the vehicle, adjusting or disabling traction control may help in maximizing power delivery through corners.
- Track-Specific Software Updates: Some EV manufacturers offer track-oriented software updates or tuning options. Check with your manufacturer or community forums to see if these are available for your car.
3.5 Weight Management
- Remove Unnecessary Items: Strip out non-essential items like floor mats, cargo, or rear seats (if allowed by event and class rules) to reduce weight and improve handling.
- Balance Considerations: EVs tend to have a low center of gravity thanks to their battery packs. However, distributing any additional weight evenly can help maintain balance and improve cornering performance.
3.6 Brake System Optimization
- Brake Pad Upgrades: Performance brake pads can improve stopping power and reduce fade during multiple runs.
- Fluid Check: Ensure your brake fluid is fresh and of high quality to handle the demands of spirited driving.
- Brake Cooling: If your EV allows for it, explore methods to improve brake cooling, such as vented rotors or additional cooling ducts.
By focusing on these areas, you can transform your EV into a formidable autocross competitor while maintaining its reliability and day-to-day usability. Start with small tweaks and build up as you gain experience and identify what works best for your driving style and local courses.
4. Driving Techniques for EVs in Autocross
Driving an EV in autocross requires mastering a unique set of techniques to leverage the instant torque, regenerative braking, and weight distribution that set electric vehicles apart. Here are some key driving tips to help you maximize your performance on the course:
4.1 Managing Regenerative Braking
- Understand Your Regen Settings: Most EVs allow you to adjust the level of regenerative braking. For technical courses, higher regen can help with tight cornering, but it may feel abrupt. Experiment to find a setting that suits your style.
- Blended Braking: Expect to use a combination of regenerative and traditional (friction) braking for smoother deceleration. For heavy braking zones, regenerative braking alone will not be sufficient. Use that brake pedal.
- Trail Braking: Modulate the brakes while entering corners to maintain balance and improve turn-in precision. This technique can be especially effective with EVs’ low center of gravity.
4.2 Maximizing Torque and Power Delivery
- Smooth Throttle Application: Avoid mashing the accelerator, which can lead to wheelspin and lost traction. Instead, apply power gradually as you exit corners to ensure maximum grip.
- Torque Management in Tight Corners: In low-speed turns, EVs’ instant torque can cause understeer or oversteer. Modulate your throttle to maintain stability and control.
- Use Track Mode: If your EV has a track or performance mode, enable it for sharper throttle response and more control over the automated intervention from traction control systems.
4.3 Cornering Techniques
- Learn the Line: Walk the course beforehand to identify the ideal racing line. Focus on late apexing (turning into the corner slightly later) to set yourself up for faster exits.
- Minimize Steering Input: Smooth and precise steering inputs reduce understeer and maintain momentum. Avoid jerky movements that unsettle the car.
- Power Through Exits: Once you’re past the apex, progressively apply power to maximize acceleration onto straights.
4.4 Leveraging Weight Distribution
- Adapt to Your EV’s Balance: EVs often have a low center of gravity and even weight distribution, making them highly stable. Use this to your advantage when transitioning through slaloms or quick directional changes.
- Anticipate Weight Shifts: Sudden acceleration or braking can cause weight to shift forward or backward. Keep your driver inputs smooth to maintain consistent grip on all four tires.
4.5 Adapting to Course Features
- Slaloms: Focus on rhythm and flow through cone slaloms. Position your car early and maintain consistent speed to avoid unnecessary steering adjustments.
- Tight Hairpins: Brake early and rotate the car with controlled throttle application to exit efficiently. High regen settings can help with braking here.
- High-Speed Sweepers: Gradually increase speed while maintaining a steady line. Trust your tires and minimize abrupt inputs.
4.6 Handling EV-Specific Challenges
- Battery Heat Management: Avoid aggressive acceleration after every run if the course is short and intense. Let the car cool down as needed to maintain consistent performance.
- Instant Power Advantage: EVs excel at launching off the line. Use this to your advantage at the start of each run to gain early momentum.
- Noise Awareness: Without engine noise, it’s harder to gauge speed by sound. Focus on visual cues like cone spacing and cornering angles to stay in control.
4.7 Practice and Feedback
- Seek Coaching: Many autocross events have experienced drivers willing to ride along or offer tips. Take advantage of their insights.
- Review Your Runs: Record your laps with an onboard camera or data logger to analyze your performance and identify areas for improvement.
- Experiment: Every course is different, so use practice runs to test different techniques, regen settings, and throttle responses.
With these driving techniques, you’ll be better prepared to unlock the full potential of your EV in autocross. Consistency, precision, and adaptability are key—practice often and have fun pushing your limits!
5. Comparing EVs vs. ICE Vehicles in Autocross
Electric vehicles (EVs) and internal combustion engine (ICE) vehicles bring distinct advantages and challenges to autocross. Understanding these differences can help you appreciate the strengths of your EV and adapt your driving to make the most of its unique capabilities.
5.1 Key Advantages of EVs
- Instant Torque: EVs deliver peak torque from zero RPM, providing explosive acceleration out of corners and off the starting line.
- Low Center of Gravity: Batteries are typically mounted low in EVs, resulting in excellent balance and stability through corners.
- Linear Power Delivery: Unlike ICE vehicles with gear changes and turbo lag, EVs offer smooth and predictable power, making them easier to control in tight sections.
- Quiet Operation: The lack of engine noise can improve focus and allow drivers to better hear tire feedback on the course.
5.2 Challenges for EVs in Autocross
- Weight: Batteries add significant mass, which can impact agility and braking performance. Drivers must account for the added inertia when cornering.
- Thermal Management: Repeated hard acceleration and braking can heat up the battery, reducing performance if not properly managed.
- Regenerative Braking Learning Curve: Adjusting to regen braking requires practice, as it differs from the feel of traditional brakes.
- Limited Aftermarket Support: While ICE vehicles benefit from decades of aftermarket development, the EV performance market is still growing, with fewer options for suspension, brakes, and tires.
5.3 Key Advantages of ICE Vehicles
- Lower Weight: Without large battery packs, ICE cars are generally lighter, making them nimble and quick to change direction.
- Established Modifications: A wealth of aftermarket parts and tuning options are available for ICE vehicles, enabling fine-tuned performance for autocross.
- High-End Top Speed Performance: Some ICE vehicles excel at maintaining power delivery at high speeds, which can be an advantage on open autocross layouts.
5.4 Challenges for ICE Vehicles
- Power Delivery: ICE engines often require higher RPMs to deliver peak power, which can delay acceleration out of corners compared to EVs.
- Complex Drivetrains: Gear changes can lead to power loss or hesitation, especially for less experienced drivers.
- Noise and Vibration: While some drivers enjoy the auditory feedback of ICE engines, others may find it distracting compared to the smooth, quiet operation of EVs.
5.5 Handling Differences
- Weight Distribution: EVs typically have a more even weight distribution due to their battery placement, while ICE cars may have a front-heavy or rear-heavy bias, affecting cornering behavior.
- Traction Management: Many EVs have advanced traction control systems optimized for electric motors, which can enhance grip compared to older ICE vehicles.
- Rotational Dynamics: ICE cars, especially rear-wheel-drive models, often rotate more easily in corners, while the heavier and more planted EVs may require deliberate effort to achieve rotation.
5.6 Course Adaptation
- Tight Technical Courses: EVs excel in short, twisty layouts where instant torque and low-speed handling dominate.
- Open, High-Speed Courses: ICE vehicles may have an edge in courses with long straights or sweeping corners, as they can exploit their weight advantage to carry more speed at the limits of grip.
5.7 The Bottom Line
- Driver Skill Matters Most: While EVs and ICE vehicles have unique traits, the driver’s ability to adapt, read the course, and execute precision maneuvers is the ultimate determinant of success.
- Friendly Rivalry: Many autocross events feature a mix of EVs and ICE cars. This diversity fosters a competitive but supportive environment where drivers can learn from each other.
- EVs Are Competitive: Despite their challenges, EVs have proven themselves capable of competing—and winning—against ICE vehicles in autocross, especially as more drivers master their distinct characteristics.
By embracing these differences and focusing on your strengths as a driver, you’ll find that both EVs and ICE vehicles offer exciting and rewarding autocross experiences. Let the competition—and the learning—continue!
6. Equipment and Gear
In autocross, the right equipment and gear can enhance both your safety and performance. While the focus is primarily on vehicle setup, having the proper personal gear and tools on hand ensures you’re fully prepared for the demands of racing. Here’s what you need:
6.1 Essential Tools for EV Autocross Participants
- Tire Pressure Gauge: Accurate tire pressure is critical for optimal performance. Keep a reliable gauge in your kit to check your tire pressures before each run and adjust them for the best balance of grip and handling.
- Portable Air Compressor: If you need to adjust tire pressures between runs or before the event, a compact air compressor will save time and ensure you’re always ready to go.
- Torque Wrench: Ensure your wheels are securely fastened by using a torque wrench to tighten lug nuts to the manufacturer’s recommended specification.
- Charging Equipment: If your event location offers charging stations or if you need to top off your battery during the day, bring your EV’s charging cable and adapters, just in case. Some events may even provide access to fast-charging locations.
- Multi-tool/Basic Tool Kit: For any quick fixes or adjustments, having a small toolkit with screwdrivers, pliers, and basic wrenches can come in handy.
6.2 Personal Protective Gear
- Helmet: A high-quality, DOT-approved helmet is essential for safety. Some events may allow rental helmets, but it’s ideal to bring your own for the best fit and comfort. Full-face helmets offer additional protection, especially if your event involves higher speeds. Open-face helmets are a good option for hot climate locations.
- Driving Gloves: A good pair of gloves improves your grip on the steering wheel and provides better control, particularly during hard cornering and quick directional changes. They also protect your hands from abrasions in the event of a spin or contact with interior surfaces.
- Footwear: Wear shoes that provide good pedal feel and support. Flat-soled shoes, such as driving shoes or athletic sneakers, are ideal, as they help you feel the pedals more effectively for quick and precise throttle and brake inputs.
- Head and Neck Restraint: In some events, especially those involving faster speeds or modified vehicles, wearing a head and neck restraint system is recommended for extra protection.
6.3 Vehicle Equipment
- Racing Tires: For competitive autocross events, performance tires designed for high grip and quick response are crucial. Depending on the level of competition and event rules, tires may need to meet specific requirements (e.g., tread wear, type of tire).
- Brake Pads: High-performance brake pads provide better stopping power and can withstand the repeated hard braking typical in autocross events. Ensure your brake pads are suited for autocross conditions to avoid brake fade.
- Brake Fluid: To prevent overheating and ensure optimal braking performance, ensure that your brake fluid is fresh and suitable for high-performance driving. Upgrading to a higher boiling point fluid may be necessary for frequent or high-intensity events.
- Suspension Components: While not essential for every driver, upgrading suspension components such as springs, sway bars, and coilovers can improve handling, reduce body roll, and provide better cornering performance.
- Camera or Data Logger: For feedback and improvement, installing an onboard camera or data logging system can help you analyze your runs. You can track lap times, monitor vehicle telemetry, and review footage to fine-tune your technique.
6.4 Event-Specific Gear
- Cooler/Water Bottles: Autocross can be physically demanding, so it’s important to stay hydrated. Bring a cooler with water or sports drinks, especially for longer events or warm weather.
- Sun Protection: If autocross is taking place in an open, exposed area, wear sunscreen and bring a hat or sunglasses to protect yourself from the sun.
- Pit Tools: If you’re attending multiple events, consider carrying a small folding chair, sunshade, and a toolset for any necessary vehicle adjustments during breaks between runs.
6.5 Additional Considerations for EVs
- Battery Management Tools: For frequent or high-performance events, some drivers opt for an external battery management tool to monitor battery health and ensure it stays within optimal operating temperatures.
- Charging Station Finder: Keep a portable charger or an EV-specific charging app on your phone to locate nearby charging stations, especially if your autocross event is spread across multiple locations or requires a longer commute.
Having the right equipment and gear ensures that you’re not only prepared but also can compete at your best in autocross events. Whether you’re maintaining your vehicle’s setup, optimizing your driving comfort, or ensuring your safety, a well-equipped kit will give you the edge in performance and confidence.
Photo Credits:
- Turtleshark Shooter
- Richard Mann
