Abarth 595 Braking System: Stopping Power Explained

The Abarth 595 isn't just about blistering acceleration and a raucous exhaust note; it's equally defined by its ability to stop with precision and confidence. For a car that encourages spirited driving, the braking system is paramount, ensuring that all that power can be tamed safely and effectively. Understanding the components, their function, and proper maintenance is crucial for any Abarth owner looking to maximise performance and safety on the road or track.

At its core, the Abarth 595's braking system is designed to handle the demands of a lightweight, powerful hot hatch. While the standard setup is more than adequate for everyday driving and occasional spirited runs, Abarth offers a range of upgrades, most notably the renowned Brembo system, that elevate stopping performance to race-track levels. This article will delve into the various aspects of the Abarth 595's brakes, from basic principles to advanced upgrades and essential maintenance practices.

The Fundamentals of Abarth 595 Braking

Every Abarth 595, regardless of its trim level, utilises a disc brake system on all four wheels. This system relies on friction generated between a rotating disc (rotor) and stationary pads, which are pressed against the disc by calipers. This converts the kinetic energy of the moving car into heat, slowing it down. The efficiency of this conversion, and the system's ability to dissipate heat, are key to consistent braking performance.

Standard Braking Components

The standard Abarth 595 models typically come equipped with solid or ventilated discs at the front and solid discs at the rear. Ventilation in the front discs helps to dissipate heat more effectively, reducing the risk of brake fade during prolonged or heavy braking. The calipers are usually single-piston floating calipers, which are cost-effective and provide sufficient clamping force for standard use. The brake pads are typically a semi-metallic or organic compound, offering a good balance of performance, noise, and longevity for everyday driving.

• Brake Discs: Responsible for providing the surface against which the pads press. Material is typically cast iron.
• Brake Calipers: Houses the pistons that push the pads onto the discs.
• Brake Pads: The friction material that contacts the disc.
• Brake Fluid: The hydraulic medium that transmits pressure from the pedal to the calipers.
• Brake Lines: Connect the master cylinder to the calipers, carrying the brake fluid.

The Brembo Upgrade: Elevating Performance

For those seeking superior braking performance, particularly for track days or very aggressive road driving, the Abarth 595 offers an optional Brembo braking system. This is a significant upgrade that transforms the car's stopping capabilities.

Key Features of the Brembo System

The Brembo system typically includes larger, cross-drilled and ventilated front brake discs, often in a two-piece design to further aid heat dissipation and reduce unsprung weight. The most noticeable upgrade, however, are the fixed calipers. Unlike the floating calipers of the standard system, Brembo calipers are usually four-piston (or even more) monobloc designs. These calipers offer superior rigidity, more consistent pad contact, and significantly increased clamping force. The multiple pistons distribute pressure more evenly across the pad, leading to better wear and more precise braking feel.

The benefits of the Brembo system are immediately apparent: reduced stopping distances, greater resistance to brake fade during repeated heavy braking, and a more firm and confidence-inspiring pedal feel. This makes it an invaluable upgrade for enthusiasts who push their Abarth to its limits.

Understanding Brake Components in Detail

Brake Discs (Rotors)

• Solid Discs: Basic design, found on rear wheels or older/base models. Less heat dissipation.
• Ventilated Discs: Feature a central gap with vanes that act like a fan, drawing air through the disc to cool it. Essential for front brakes on performance cars.
• Cross-Drilled Discs: Have holes drilled through the disc surface. These help to dissipate heat, expel gasses and debris, and provide a slight improvement in wet braking. However, they can be prone to cracking under extreme stress.
• Grooved (Slotted) Discs: Feature slots machined into the disc surface. Similar benefits to drilled discs but generally more durable under high performance, as they are less prone to cracking.
• Two-Piece Discs: Consist of an outer friction ring and an inner hub (bell) made from different materials (e.g., cast iron friction ring on an aluminium bell). This reduces unsprung weight, improves heat dissipation, and allows for thermal expansion without warping. Often found in high-performance aftermarket or OEM upgrade kits like Brembo.

Brake Calipers

• Floating Calipers: Most common type. The caliper slides on pins, allowing the single piston to push one pad against the disc, and the caliper body to pull the other pad into contact.
• Fixed Calipers: Used in performance systems (like Brembo). These are rigidly mounted and have multiple pistons (2, 4, 6, or more) on both sides of the disc. This provides more even pressure distribution, greater clamping force, and superior rigidity, leading to better pedal feel and performance.

Brake Pads

Brake pads are the sacrificial components, designed to wear down over time. Their material composition significantly impacts performance, noise, and longevity.

• Organic (NAO - Non-Asbestos Organic): Good for everyday driving, low noise, gentle on discs, but lower friction coefficient and prone to fade under heavy use.
• Semi-Metallic: Common for performance street cars. Good friction, better fade resistance than organic, but can be noisier and create more dust.
• Ceramic: Excellent performance, very low dust, quiet, and long-lasting. Good for street and light track use, but can be more expensive and may not offer the ultimate bite of dedicated track pads when cold.
• Track/Race Pads: Designed for extreme heat and friction. Excellent stopping power and fade resistance at high temperatures, but can be noisy, dusty, and wear discs quickly. They also often lack effectiveness when cold, making them unsuitable for street use.

Brake Fluid: The Unsung Hero

Brake fluid is a critical component of the hydraulic braking system. It transmits the force from your foot on the pedal to the calipers, activating the brakes. It's a non-compressible fluid, but it has a crucial property: its boiling point.

As brakes generate heat, this heat can transfer to the brake fluid. If the fluid boils, it creates compressible gas bubbles, leading to a spongy pedal and a significant loss of braking power – a dangerous condition known as vapour lock. Brake fluid is hygroscopic, meaning it absorbs moisture from the air over time. This absorbed moisture lowers the fluid's boiling point, making it more susceptible to vapour lock. Therefore, regular brake fluid changes (typically every two years) are essential, regardless of mileage.

Abarth 595 models typically use DOT 4 brake fluid. For track use, some enthusiasts opt for DOT 5.1, which has a higher wet boiling point, but ensure compatibility with your system components before making a change.

Maintenance and Common Issues

Regular maintenance is key to ensuring your Abarth's braking system performs optimally and safely. Ignoring brake issues can lead to increased stopping distances, premature wear, or even dangerous failures.

Routine Checks

• Brake Pad Wear: Visually inspect pad thickness. Most pads have wear indicators.
• Brake Disc Condition: Check for excessive scoring, deep grooves, or warping (indicated by pulsing through the pedal).
• Brake Fluid Level: Ensure it's between MIN and MAX marks in the reservoir. A consistently low level could indicate a leak or excessive pad wear.
• Brake Fluid Colour: Fresh fluid is clear or light amber. Dark, murky fluid indicates it's old and needs changing.
• Brake Lines: Check for any cracks, leaks, or bulges.

When to Replace

• Pads: When they reach their minimum thickness (often around 3mm, but check manufacturer specifications).
• Discs: When they are below the minimum thickness specified by the manufacturer, or if they are severely warped or cracked. It's often recommended to replace discs when replacing pads, especially on performance cars, to ensure optimal bedding-in and performance.

Common Brake Issues and Solutions

• Squealing Brakes: Often caused by vibration of the pads, discs, or calipers. Can be due to new pads bedding in, dust/debris, worn pads, or lack of proper lubrication on contact points. Cleaning and applying brake grease can help.
• Grinding Noise: A serious sign that your pads are completely worn down and the metal backing plate is grinding against the disc. Requires immediate attention to avoid disc damage.
• Spongy Pedal: Indicates air in the brake lines (requiring bleeding), old brake fluid (vapour lock), or a master cylinder issue.
• Pulsating Pedal (Vibration): Almost always a sign of warped brake discs. This occurs when the discs are not perfectly flat, causing the caliper to push the pad unevenly.
• Brake Fade: Loss of braking effectiveness due to excessive heat. Can be caused by undersized brakes for the application, worn components, or old brake fluid. Upgrading to performance pads/discs or a Brembo system helps combat this.
• Pulling to One Side: Can indicate a sticking caliper, uneven pad wear, or a fluid blockage in one brake line.

Upgrading Your Abarth 595 Brakes

Beyond the factory Brembo option, the aftermarket offers a vast array of brake upgrades for the Abarth 595. These range from performance pads and braided brake lines to full big brake kits.

• Performance Pads: The easiest and often most effective first upgrade. Choose a pad compound suited to your driving style.
• Braided Brake Lines: Replace standard rubber hoses with stainless steel braided lines. These expand less under pressure, leading to a firmer and more consistent pedal feel.
• Aftermarket Discs: Slotted or drilled discs from brands like Tarox, EBC, or Brembo (aftermarket versions) can improve heat dissipation and bite.
• Big Brake Kits (BBK): These comprehensive kits typically include larger multi-piston calipers, bigger two-piece discs, and performance pads. They offer the ultimate in stopping power and fade resistance, but are a significant investment.

When considering upgrades, always ensure compatibility with your vehicle and consider your primary use case. A track-focused setup might be overkill and even detrimental for a purely street-driven car, as race pads often require high temperatures to work effectively.

Frequently Asked Questions About Abarth 595 Brakes

Q: How often should I change my Abarth 595 brake fluid?

A: It's generally recommended to change your brake fluid every two years, regardless of mileage. This prevents moisture absorption from lowering the boiling point and ensures optimal performance.

Q: What's the difference between floating and fixed calipers?

A: Floating calipers have one or two pistons on one side and slide to clamp the disc. Fixed calipers are rigidly mounted and have multiple pistons on both sides of the disc, offering more even clamping force and better feel, typically found on performance systems.

Q: My Abarth's brakes are squealing. Is this normal?

A: A light squeal can be normal, especially with new pads bedding in, or due to dust/moisture. However, a persistent loud squeal or grinding noise indicates an issue, often worn pads, and should be checked immediately.

Q: Can I just upgrade my brake pads without changing the discs?

A: Yes, you can. Upgrading to a more aggressive pad compound can significantly improve braking performance. However, for optimal results and to avoid premature wear or issues, ensure your discs are in good condition and consider upgrading them too, especially if they are worn or you're moving to a much higher performance pad.

Q: Is the Brembo braking system worth the extra cost?

A: If you regularly drive your Abarth spiritedly, participate in track days, or simply desire the absolute best in braking performance and confidence, then the Brembo system is undeniably worth the investment. It provides superior fade resistance, shorter stopping distances, and a more responsive pedal feel that complements the Abarth's performance character perfectly.

Conclusion

The braking system on your Abarth 595 is just as crucial as its engine for delivering that exhilarating driving experience. Whether you have the standard setup or the formidable Brembo upgrade, understanding its components, performing regular maintenance, and addressing any issues promptly will ensure your Abarth remains safe, responsive, and always ready to stop as quickly as it accelerates. Investing in quality components and timely servicing will not only preserve your car's performance but also your peace of mind on every thrilling journey.

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