18/09/2019
Hawk Pads and Carbon Ceramic Rotors: An Incompatible Pairing
When it comes to upgrading your vehicle's braking system, choosing the right combination of pads and rotors is absolutely crucial. This is not just about achieving superior stopping power, but also about ensuring the longevity and safety of your entire braking setup. One question that frequently arises among performance enthusiasts is whether Hawk Performance brake pads are compatible with carbon ceramic rotors. The straightforward answer, unfortunately, is a resounding no. Hawk Performance compounds are meticulously engineered to work in tandem with iron or metal rotors, and attempting to use them with carbon ceramic discs can lead to a host of problems, from premature wear to complete system failure. Understanding why this incompatibility exists and exploring the different Hawk compounds available for iron rotors is key to making informed decisions about your vehicle's braking needs.
Why the Incompatibility? The Material Science Behind It
The fundamental reason behind the incompatibility between Hawk pads and carbon ceramic rotors lies in the vastly different materials and their respective friction characteristics. Carbon ceramic rotors are designed to be exceptionally lightweight, durable, and resistant to heat fade. They operate effectively across a wide temperature range and offer incredible stopping power, especially in high-performance applications. However, they require specific friction materials that can match their unique properties.
Hawk Performance pads, on the other hand, are formulated with compounds that are optimised for the properties of traditional iron or metal rotors. These compounds typically rely on a different blend of metallic fibres, resins, and abrasive materials to generate friction. When a Hawk pad, designed for iron, is paired with a carbon ceramic rotor, the friction generated can be too aggressive or simply incompatible. This can lead to several detrimental outcomes:
- Excessive Wear: The friction material of the Hawk pad can abrade the surface of the carbon ceramic rotor at an accelerated rate, leading to premature wear and potentially damaging the rotor beyond repair.
- Reduced Performance: The pads may not achieve their optimal operating temperature or friction coefficient when paired with carbon ceramic, resulting in diminished braking performance.
- Judder and Noise: Incompatibility can manifest as unpleasant vibrations (judder) through the brake pedal and increased noise during braking.
- Potential for Cracking: In extreme cases, the thermal stresses induced by the incompatible materials could potentially lead to cracking of the carbon ceramic rotor.
Understanding Hawk Performance Compounds: A Deep Dive
Hawk Performance offers a comprehensive range of brake pads, each tailored for specific driving conditions and vehicle types. It's important to familiarise yourself with these compounds to select the most appropriate option for your iron or metal rotors. Here's a breakdown of some popular Hawk compounds:
For the Track and Extreme Performance:
These compounds are designed for the rigours of racing, track days, and demanding performance driving.
| Compound Name | Key Characteristics | Temperature Range (F) | Optimal Temperature (F) | Primary Applications |
|---|---|---|---|---|
| ER-1 (D) | Medium- to high-torque, consistent friction, long life. | 400-1600 | 700-1100 | Endurance racing, track days, HPDE, sprint racing (lighter vehicles). |
| DTC-80 (Q) | Highest friction, high initial bite, predictable and controllable. | 500-1700 | 600-1500 | NASCAR road course/short tracks, Trans-Am/GT1, CART, LMP1/DP. |
| DTC-70 (U) | Extremely high torque, very high initial bite, controllable. | 400-1600 | 800-1200 | Heavier sedans, formula cars, Trans-Am, GT1, CART, Formula Atlantic. |
| DTC-60 (G) | High torque, high initial bite, popular as a front pad on lighter cars. | 400-1600 | 700-1100 | Trans-Am, GT1, CART, Formula Atlantic, F2000, Sports Prototypes. |
| DTC-50 (V) | High torque, predictable friction rise, excellent fade resistance. | 300-1400 | 500-1100 | Endurance racing, vintage Trans-Am, Formula Atlantic, stadium super trucks. |
| DTC-30 (W) | Medium torque, designed for dirt track, smooth bite, good release. | 100-1200 | 100-800 | Dirt circle track, gravel rally stages, off-road racing. |
| DTC-05 (H) | Low torque, smooth and predictable, higher temp than OEM. | 100-700 | 100-500 | Dirt circle track (Midgets, Modifieds), track day events. |
| HT 14 (V) | Very high torque, high initial bite, for high downforce cars. (Replaced by DTC-50) | 300-1400 | 500-1200 | Trans-Am, GT1, CART, Formula Atlantic, Sports Prototypes. |
| HT 10 (S) | High torque, smooth initial bite, works well as a rear pad. | 300-1300 | 500-1100 | Sedans, sports racers, formula cars with downforce. |
For the Street and Light Track Use:
These compounds offer a balance of performance and daily drivability.
| Compound Name | Key Characteristics | Temperature Range (F) | Optimal Temperature (F) | Primary Applications |
|---|---|---|---|---|
| Blue (E) | Medium/High torque, medium initial bite, good modulation, #1 for SCCA. | 250-1000 | 350-800 | Production, IT, F2000, Formula Ford, S2000, CSR, DSR. |
| Black (M) | Medium torque, high initial bite, good all-purpose, low cost. | 100-900 | 200-700 | Very light sedans, small formula cars, sports racers. |
| DR-97 (J) | Specifically for drag racing, strong at low temps for starting. | Cold to 900 | 100-700 | Drag racing (only Hawk compound compatible with aluminum rotors). |
| Street-Race (R) | Dual-purpose, good for track days driven to the track, higher temp than HP Plus. | 100-1200 | 100-800 | Track day cars, autocross. |
| HP Plus (N) | Autocross and track day, ideal for lightweight circle track, streetable. | 100-800 | 300-600 | Autocross (Solo II), track days (Solo I), lightweight circle track. |
| HPS (F) | High Performance Street, outperforms OEM, good for Solo II & amateur drag. | Effective from cold | N/A | Spirited street driving, autocross, amateur drag racing. |
| HPS 5.0 (B) | Next-gen HPS, increased friction without noise/dust, tuned for ABS. | Effective from cold | N/A | Spirited street driving, daily driver. |
| Super Duty (P) | For towing/hauling heavy loads, not recommended for daily use. | N/A | N/A | Heavily-loaded trucks, SUVs, wagons. |
| LTS (Y) | Light Truck/SUV, better stopping power with less dust/noise/wear than competitors. | N/A | N/A | 1/2-ton trucks/SUVs that haul/tow, daily drivers. |
| Performance Ceramic (Z) | Luxury cars, low noise paramount, outperforms many OEM, for iron rotors ONLY. | N/A | N/A | Luxury cars, street use with iron rotors. |
Choosing the Right Pad for Your Vehicle
Selecting the correct Hawk pad compound is essential for optimal performance and longevity. Consider the following factors:
- Driving Style: Are you a daily commuter, a spirited driver, an autocross competitor, or a dedicated track day enthusiast?
- Vehicle Type: The weight, power, and intended use of your vehicle will influence the best pad choice.
- Rotor Material: As established, Hawk pads are designed for iron/metal rotors. Ensure your rotors are compatible.
- Environmental Conditions: If you drive in wet or dusty conditions, some compounds might be more suitable than others.
- Noise and Dust Tolerance: Performance-oriented pads often generate more dust and can be noisier than standard street pads.
Frequently Asked Questions
Are all Hawk pads incompatible with carbon ceramic rotors?
Yes, all Hawk Performance compounds are specifically designed for iron/metal rotors and are not compatible with carbon ceramic rotors.
What happens if I use Hawk pads with carbon ceramic rotors?
Using Hawk pads with carbon ceramic rotors can lead to premature wear, reduced braking performance, judder, noise, and potentially damage to the rotors.
What kind of rotors are Hawk pads designed for?
Hawk Performance pads are designed to work with iron/metal rotors.
Which Hawk pad is best for track days?
For track days, compounds like the ER-1, DTC-60, DTC-50, or Street-Race would be suitable, depending on the intensity of your track use and your vehicle.
Can I use Hawk pads on my daily driver?
Yes, compounds like HPS, HPS 5.0, HP Plus, and LTS are excellent choices for daily driving, offering improved performance over OEM pads without significant drawbacks.
Which Hawk compound is best for towing?
The Super Duty (P) compound is specifically engineered for towing and hauling heavy loads. The LTS (Y) is also a strong contender for light trucks and SUVs that frequently haul or tow.
Conclusion: Stick to the Right Pairing
While Hawk Performance offers an impressive array of brake pads for various applications, it's paramount to remember their incompatibility with carbon ceramic rotors. Always ensure you are matching your brake pads with the correct rotor material to guarantee optimal performance, safety, and the longevity of your braking system. For those with iron or metal rotors, Hawk provides a solution for almost every driving scenario, from daily commuting to the most demanding racing circuits. Always consult with a braking specialist or the manufacturer's guidelines if you are unsure about compatibility.
If you want to read more articles similar to Hawk Pads & Carbon Ceramic Rotors: A No-Go, you can visit the Brakes category.