Experiencing the thrill of autocross in a brand new 2023 Civic Si should be exhilarating, right? For one enthusiast, the reality was a bit more humbling. After taking delivery of their 23 Si in May and participating in their first autocross events, the results were less than stellar. At a recent event at Summit Point in WV, finishing last in the street class and being outpaced by a much older Toyota Corolla sparked a quest for improvement. While acknowledging the need for driver skill development, the owner is also exploring key modifications to unlock the 2023 Civic Si’s true autocross potential.
The Reality of a Stock 2023 Civic Si on the Autocross Course
The initial autocross experiences highlighted the limitations of a completely stock 2023 Civic Si, especially when pushed to its limits. Riding on standard Goodyear all-season tires, the car struggled with grip, resulting in excessive sliding and understeer through corners. This directly translated to slower times and a frustrating performance. The stark comparison to a modified ND Miata and even an older Corolla, despite the driver mod being paramount, signaled the need for changes to become more competitive.
Considering Performance Modifications for the Civic Si
To bridge the performance gap and enhance the autocross capabilities of the 2023 Civic Si, several modifications are under consideration. These upgrades aim to improve handling, grip, and overall responsiveness on the autocross course. Here’s a breakdown of the potential modifications being explored:
1. Wheels and Tires: A Foundational Upgrade
Lightweight wheels paired with summer performance tires are often the first and most impactful modifications for autocross. The owner is considering Konig Dekagram 18 x 8.5 wheels, which would reduce unsprung weight and improve handling. For tires, a slightly wider 245/40 size with a 300 treadwear rating is being considered for a balance of performance and longevity. This change alone can drastically improve cornering grip and reduce lap times.
2. Rear Sway Bar: Enhancing Rotation
A rear sway bar, like the SiriMoto 20mm option, is another key modification to sharpen handling. Upgrading the rear sway bar can help induce rotation and reduce understeer, making the car more agile and responsive in tight autocross corners. This modification can significantly improve the car’s balance and handling dynamics.
3. Rear Motor Mount: Performance vs. Classing
Upgrading the rear motor mount is also on the radar, but with classing implications. While a rear motor mount can reduce wheel hop and improve throttle response, it may potentially bump the car out of the Street Class and into STH (Street Touring Hatch). This trade-off needs careful consideration based on the desired level of competition and class regulations.
4. Intake and Exhaust: Breathing Easier for Performance
Modifications like a high-volume air intake (PRL) and a cat-back exhaust system (MAP catback “street” version) are being considered to improve engine breathing and potentially unlock more power. While these mods might offer modest performance gains, they can also enhance the driving experience with improved sound and throttle response.
The Driver Mod: The Most Critical Upgrade
While hardware modifications can significantly enhance the 2023 Civic Si’s performance, the “driver mod” remains paramount. As emphasized by the owner’s son, developing driving technique and autocross skills is crucial. No amount of modifications can compensate for poor driving technique. Therefore, investing in driver training, practicing car control, and gaining experience are essential components of improving autocross performance alongside vehicle upgrades.
Is it Worth the Investment?
The question remains: is investing around $3500 in these modifications worthwhile? For someone serious about improving their autocross performance in a 2023 Civic Si, these upgrades are a logical starting point. They address key areas of improvement and can transform the car’s handling and competitiveness. However, it’s crucial to balance these modifications with driver skill development to fully realize the potential of both the car and driver. The journey of autocross improvement is a combination of car upgrades and honing driving skills, working in tandem to achieve better results and greater enjoyment on the track.
