01/12/2017
Understanding Ferodo's Performance Brake Pad Compounds: DS1.11 and DSUNO
When it comes to upgrading your vehicle's braking system, selecting the right brake pads is paramount. Among the performance-oriented options, Ferodo stands out as a reputable manufacturer, offering a range of compounds designed for specific driving demands. Two of their highly regarded offerings are the DS1.11 and the DSUNO. While both are engineered for enhanced stopping power and durability, they possess distinct characteristics that cater to different performance needs. This article delves into the intricacies of these two compounds, helping you make an informed decision for your automotive application.
The world of performance braking can often feel like a labyrinth of technical jargon and subtle differences. However, understanding the core attributes of key players like Ferodo's DS1.11 and DSUNO can demystify the process. Both compounds share a common heritage, being manufactured from the same core materials. This is a significant advantage, as it means you can swap between them without the usual concerns of pad material contamination on the disc surface. Unlike some other brands where mixing compounds can lead to high spots, smearing, and the dreaded judder and vibration, Ferodo's consistent material base ensures a cleaner transition. This means that after an initial bedding-in period, you can switch between these Ferodo pads without the arduous task of completely cleaning the discs. A few firm stops are usually sufficient to mate the new pads to the disc face.
Introducing the Ferodo DS2500: The Versatile All-Rounder
Before we dive deeper into the DS1.11 and DSUNO, it's worth acknowledging the DS2500. Often described as an outstanding 'tweener' pad, the DS2500 strikes a remarkable balance between high-temperature performance and user-friendly 'manners.' It offers a fairly high temperature threshold, making it suitable for spirited driving and occasional track use on lighter or less powerful vehicles. While it can sometimes produce a slight chirp or squeal on the final bit of pedal travel when coming to a complete stop, it's generally considered a relatively quiet and disc-kind compound. In fact, Ferodo supplies many major automotive manufacturers with compounds virtually identical to the DS2500 as original equipment (OE) specification pads. The Chevrolet Corvette C7 Z06, for instance, with its iron brakes, comes from the factory with pads closely resembling the DS2500. Its unique blend of performance and refinement has solidified its reputation as one of the best dual-purpose pads available. However, for very fast and heavy cars, particularly on the front axle during track use, the DS2500 might reach its limits, and therefore, it's not typically recommended for such demanding scenarios.
Ferodo DS1.11: The Moderate Performer
The Ferodo DS1.11 is positioned as a moderate friction (mu) compound. This means it offers a predictable and progressive braking response. When you apply pressure to the brake pedal, you'll need to exert a bit more force to achieve the same level of deceleration compared to the DSUNO. However, this characteristic also translates to excellent modulation, allowing drivers to fine-tune their braking inputs with precision. The DS1.11 is known for its commendable wear characteristics, not only for the pad material itself but also for the brake discs. This longevity is a significant advantage for those who want to extend the life of their braking components. Furthermore, the DS1.11 boasts a relatively flat torque curve. A flat torque curve indicates that the braking force delivered by the pad remains consistent across a wide range of temperatures and pedal pressures. This predictability contributes to a more stable and confidence-inspiring braking experience, especially during demanding driving situations.
A key application for the DS1.11 is in a staggered setup, often paired with the DS2500 at the rear. This combination is favoured by drivers who frequently encounter a variety of driving conditions and wish to minimise pad swaps. By retaining the DS2500 at the rear and upgrading the fronts to DS1.11 for more demanding use, a slight bias is shifted towards the front of the car. This means the front brakes undertake a greater proportion of the braking workload, which can be beneficial for overall braking performance and feel.
Ferodo DSUNO: The Aggressive Bite
In contrast to the DS1.11, the Ferodo DSUNO compound is designed for higher friction (mu) across its entire operating range. This translates to a more immediate and aggressive initial bite when the brake pedal is applied. Drivers who appreciate a sharp, responsive braking feel will find the DSUNO particularly appealing. You won't need to press as hard on the brake pedal to achieve the same stopping power as you would with the DS1.11. This heightened sensitivity can be advantageous in situations where rapid deceleration is critical. All other aspects of the DSUNO's performance are generally considered similar to the DS1.11, meaning it also benefits from good wear characteristics and a relatively predictable torque curve, albeit with a higher overall friction coefficient. This makes it a formidable choice for heavy-duty use and performance driving scenarios.
The DSUNO is frequently used on both the front and rear axles for drivers seeking maximum braking performance. It's also a popular choice for staggered setups, such as pairing DSUNO fronts with DS1.11 rears. This configuration further accentuates the front-biased braking, as the DSUNO's higher mu on the front axle takes on an even greater share of the braking duties. While this setup can be very effective, it's important to be mindful that increasing the workload on the front brakes will also lead to increased wear rates on the front pads and discs. It's a trade-off for enhanced front-end stopping power.
Comparative Analysis: DS1.11 vs. DSUNO
To summarise the key differences, let's look at a direct comparison:
| Feature | Ferodo DS1.11 | Ferodo DSUNO |
|---|---|---|
| Friction (Mu) | Moderate | High |
| Initial Bite | Predictable, progressive | Aggressive, immediate |
| Pedal Feel | Requires firmer pedal pressure for equivalent response | Requires less pedal pressure for equivalent response |
| Torque Curve | Fairly flat | Relatively flat (with higher overall mu) |
| Wear Characteristics (Pads & Discs) | Good | Good |
| Ideal Use Case | Spirited road driving, track days (lighter/less powerful cars), consistent performance | Heavy-duty use, track days, aggressive driving, maximum stopping power |
Choosing the Right Compound for Your Needs
The decision between the DS1.11 and DSUNO, or even incorporating the DS2500, largely depends on your intended use and personal preferences. Many vehicle owners opt for a balanced approach, running the same pad compound on both the front and rear axles. This is often the recommended starting point, as modern braking systems are designed to mimic OEM brake torque output across both axles. For instance, running DS1.11 front and rear provides a consistent, moderate-friction experience with good longevity. Similarly, running DSUNO front and rear delivers potent, aggressive braking across the entire vehicle.
However, a significant portion of enthusiasts (around 30%) prefer a staggered setup, employing a slightly higher friction pad at the front and a slightly lower friction pad at the rear. This shifts the brake bias forward, meaning the front brakes do more of the work. Popular staggered combinations include:
- Front DS1.11 / Rear DS1.11: A solid all-around choice for consistent performance.
- Front DSUNO / Rear DSUNO: For maximum stopping power and an aggressive feel.
- Front DSUNO / Rear DS1.11: A more pronounced front bias, favouring initial bite and front axle work.
- Front DS1.11 / Rear DS2500: A milder front bias, suitable for those who prefer to leave DS2500 on the rear year-round and only swap front pads for heavier use.
- Front DSUNO / Rear DS2500: An even more aggressive front bias, typically not recommended as a starting point but preferred by some experienced drivers.
- Front DS2500 / Rear DS2500: An excellent setup for spirited road use and suitable for heavy-duty applications on smaller, lighter vehicles. However, as mentioned, it's generally not recommended for track use on heavier, faster cars like the M2.
When considering these staggered setups, remember that continuously shifting more braking workload to the front will inevitably increase wear rates on the front pads and discs. It's crucial to monitor component health regularly.
Frequently Asked Questions
Q1: Can I mix Ferodo DS1.11 and DSUNO pads on my car?
Yes, Ferodo's compounds are designed to be compatible, meaning you can run different compounds on the front and rear axles without fear of material contamination on the disc surface.
Q2: Are Ferodo DS1.11 and DSUNO noisy?
While generally well-mannered, performance pads can sometimes produce noise, especially during initial bedding or under specific braking conditions. The DS2500 is known for being the quietest of the three, while the DS1.11 and DSUNO may exhibit some noise, particularly under heavy use.
Q3: Which pad is better for track days?
For demanding track use, especially on heavier and faster cars, the DS1.11 and DSUNO are generally more suitable than the DS2500. The DSUNO offers a higher friction coefficient for maximum stopping power, while the DS1.11 provides a more progressive feel with excellent endurance.
Q4: Will changing brake pads affect my car's ABS?
While brake pads do not directly control the ABS system, a significant change in braking performance or feel could potentially influence how the ABS intervenes. However, with compatible and properly installed pads like the Ferodo range, the ABS should continue to function as intended.
Q5: How do I bed in new Ferodo brake pads?
After installing new pads, a bedding-in process is recommended. This typically involves a series of moderate to firm stops from increasing speeds, allowing the pads and discs to mate properly. Ferodo's consistent material base means you don't need to be as meticulous as with some other brands, but a short bedding-in procedure will ensure optimal performance and longevity.
In conclusion, both the Ferodo DS1.11 and DSUNO offer compelling performance benefits for discerning drivers. The DS1.11 provides a balanced, predictable, and durable braking experience with a moderate friction coefficient, making it ideal for spirited driving and consistent performance. The DSUNO, on the other hand, delivers a more aggressive bite and higher friction, catering to those who demand maximum stopping power and a sharper pedal feel, especially in heavy-duty and track-focused applications. By understanding their distinct characteristics and considering your specific driving needs, you can confidently choose the Ferodo compound that will elevate your vehicle's braking capabilities.
If you want to read more articles similar to Ferodo Brake Pad Compounds: DS1.11 vs. DSUNO, you can visit the Brakes category.