06/06/2013
Understanding ACC Brake Pads: A Driver's Essential Guide
Assetto Corsa Competizione (ACC) is renowned for its meticulous simulation of GT racing, and this extends to the intricate details of car setup. Among the most crucial, yet often overlooked, components are the brake pads. Selecting the correct brake pad for your GT3 or GT4 car can significantly impact your braking performance, consistency, and even tyre wear. This guide will delve into the different types of brake pads available in ACC, when to deploy them for various conditions and race durations, and how they fit into the broader picture of optimising your car's setup.
Why Do ACC Cars Have Different Brake Pads?
The variety of brake pads in ACC is designed to mimic the real-world choices available to racing teams. Different pads offer distinct characteristics in terms of braking performance, heat management, and wear rates. A pad that excels in a short, intense qualifying session might overheat and degrade rapidly in a long endurance race. Conversely, a pad built for longevity might not offer the absolute peak braking power required for a single flying lap. ACC simulates these trade-offs, allowing drivers to tailor their braking system to the specific demands of each session, be it a short sprint, a gruelling endurance event, or a wet-weather challenge.
Types of Brake Pads in ACC
Within ACC, brake pads are broadly categorised by number, indicating their intended use. It's important to note that the specific characteristics and designations can differ slightly between GT3 and GT4 cars.
GT3 Brake Pads:
- Pad 1: This is your go-to for short sprint races, typically under 2 hours. It offers the most aggressive braking performance but has the shortest lifespan. Ideal for qualifying and short races where maximum stopping power is paramount.
- Pad 2: Designed for longer endurance events (over 3 hours), this pad provides a good balance between braking performance and significantly improved durability. Essential for maintaining consistent braking lap after lap in extended races.
- Pad 3: Specifically for wet weather racing. It offers moderate braking performance but boasts excellent pad life, even in colder conditions. This pad is crucial for maintaining control when grip is scarce.
- Pad 4: This pad is designed to simulate the wear characteristics of Pad 1 but over an extremely short timeframe. It's generally not recommended for racing unless you are specifically practicing under extreme pad wear conditions to understand its effects.
GT4 Brake Pads:
- Pad 1: This pad has a very short lifespan and is not recommended for use in any race conditions. It might be more suited for extreme simulation practice.
- Pad 2: This is the best all-around performing pad for GT4 cars, providing good performance across all conditions and suitable for various race durations.
When to Use Which Brake Pad: A Practical Guide
Making the right choice of brake pad depends heavily on the session type, duration, and track conditions. Here's a breakdown of recommended pad usage:
| Session | Condition | GT3 Brake Pad Type | GT4 Brake Pad Type |
|---|---|---|---|
| Hotlap | Dry | Pad 1 | Pad 1 |
| Qualifying | Dry | Pad 1 | Pad 1 |
| Dry Race | Under 2 hours | Pad 1 | Pad 2 |
| Dry Race | 2-18 hours | Pad 2 | Pad 2 |
| Dry Race | up to 24 hours | Pad 2 | Pad 2 |
| Damp Conditions | Mixed | Pad 2 | Pad 2 |
| Wet Race | Wet | Pad 2 | Pad 2 |
| Extremely Wet Conditions | Very Wet | Pad 3 | Pad 2 |
| Practice | Normal Practice | Pad 1 | Pad 2 |
| Practice | Extreme Simulation (Pad Wear) | Pad 4 | Pad 1 |
| Brake Wear Simulation | N/A | Pad 4 | Pad 1 |
Understanding Brake Temperatures
Brake temperature is critical for optimal performance. In ACC, you can monitor brake temperatures using tools like MoTeC. The ideal operating window for brake pads varies, but generally:
- Pad 1 (GT3/GT4): 150°C – 600°C (rear brakes)
- Pad 2 (GT3/GT4): 150°C – 600°C (rear brakes)
- Pad 3 (GT3): 130°C – 700°C (rear brakes)
Note: Front brake temperatures are often higher. The optimal range for front brakes is typically 600°C – 650°C, and for rear brakes, around 450°C. Brake ducts play a vital role in managing these temperatures. Adjusting them can help keep your brakes in the green (optimal) zone, preventing overheating (red) or being too cold (blue). Higher speed tracks may benefit from lower brake duct values to reduce drag, while handling-focused tracks might require higher values to manage heat.
Brake Pad Wear and Longevity
The lifespan of a brake pad is directly related to its compound and how it's used. Pad 1, while offering the best initial bite, will wear down much faster than Pad 2. Pad 3 is designed for longevity in wet conditions. Understanding when a pad is nearing its end of life is crucial. In ACC, you can often infer this from a decrease in braking effectiveness or an increase in brake pedal travel. Overly worn pads can lead to reduced stopping power and potentially damage to the brake discs.
Impact on Car Setup
Brake pad choice is just one element of a comprehensive car setup. It interacts with other parameters such as brake bias and suspension settings. For instance, a more aggressive pad might allow for a slightly more rearward brake bias without compromising stability, as the pads themselves can handle the heat. Conversely, if you're using a pad that generates less initial bite, you might need to shift the bias forward to compensate.
Key takeaway: Always ensure your brake pads are within their optimal temperature range. This is achieved through a combination of the correct pad selection and appropriate adjustment of brake ducts and, if necessary, ABS settings.
Frequently Asked Questions (FAQs)
Q1: What temperature should brake pads be in a car?
A1: For optimal performance in ACC, aim for front brakes to be between 600°C – 650°C and rear brakes around 450°C. Different pad compounds have slightly different optimal windows, but generally, keeping them within the 150°C – 700°C range, depending on the pad type and position, is advisable.
Q2: How do I know which brake pad to use in ACC?
A2: Refer to the table provided in this guide. Generally, Pad 1 is for short, fast sessions (qualifying, sprints), Pad 2 is for endurance races and general dry conditions, and Pad 3 is specifically for wet conditions.
Q3: Can brake pad choice affect tyre wear?
A3: Indirectly, yes. Aggressive braking, often associated with high-performance pads, can lead to increased tyre wear if not managed smoothly. Furthermore, if brakes overheat due to incorrect pad selection or poor duct management, it can transfer heat to the tyres, negatively impacting their wear and performance.
Q4: Should I use the same brake pads for GT3 and GT4 cars?
A4: While the numbering system is similar, the specific performance characteristics and ideal usage can differ between GT3 and GT4 cars due to their inherent design differences. Always consult the specific recommendations for the car class you are driving.
Conclusion
Mastering the nuances of brake pad selection in Assetto Corsa Competizione is a vital step towards consistent pace and improved racecraft. By understanding the strengths and weaknesses of each pad type and applying this knowledge to different race scenarios, you can gain a significant advantage. Remember to always consider the interplay between your brake pads, temperatures, tyre wear, and overall car setup. For more in-depth guidance and access to expertly crafted setups, consider exploring resources like The Coach Dave Academy, which can help you shave off those crucial seconds per lap.
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