Ford ST Brake Upgrades: The Ultimate Guide

When it comes to the exhilarating performance of a Ford ST, the ability to stop effectively is just as crucial as the power under the bonnet. Whether you're navigating the daily commute, enjoying a spirited drive on winding B-roads, or pushing the limits on a track day, having a braking system that inspires confidence and performs flawlessly is paramount. This guide is your definitive resource for understanding, maintaining, and upgrading your Ford ST's braking system, ensuring it meets your specific needs and driving style. We'll delve into each key component, from the humble brake pad to advanced caliper setups, helping you make informed decisions for optimal safety and performance.

Understanding Your Ford ST's Braking System

Your Ford ST's braking system is a complex interplay of several crucial components, all working in harmony to bring your vehicle to a controlled halt. To truly tailor your brakes to your driving style, it's essential to understand the role each part plays. The primary components that can be upgraded or changed include the discs, pads, calipers and carriers, brake fluid, and brake hoses. Each offers a different avenue for enhancing stopping power, heat resistance, and pedal feel.

Brake Pads: The Foundation of Stopping Power

In many enthusiasts' eyes, the brake pads are the first port of call when looking to upgrade from a standard factory setup. The choice of brake pad dictates much of your braking experience, from initial 'bite' to resistance against fade under extreme heat. Pad manufacturers achieve different performance characteristics by altering the compound used in their construction.

Standard (OEM) Replacement Pads

A standard original equipment (OE) pad compound is designed to work effectively at very low temperatures, providing a pleasant initial bite for everyday driving. Brands like Ford OEM, Mintex, EBC Ultimax, Brembo, Bosch, Delphi, and Pagid offer excellent standard replacements. These pads are typically suitable for drivers who use their ST for daily commuting, trips to the shops, and rarely push the car hard on twisty roads.

Cost: A set of front standard replacement pads for a Ford ST can cost up to £40.

Fast Road Pads

Moving up a level, 'fast road' pads are designed for drivers who enjoy more spirited driving but don't frequently visit the track. These pads offer improved performance over standard options, with better heat resistance and a more consistent pedal feel during heavy braking. Popular choices include EBC Greenstuff, Cosworth Street Master, Ferodo DSPerformance, and Tarox Strada.

These pads are ideal for daily driving, spirited B-road use, and can even cope with occasional light track work. They're also a good upgrade for STs running increased horsepower, as more power inevitably generates more heat under braking.

Fast Road/Track Pads

For those who frequently engage in fast road driving and occasional track days, 'fast road/track' pads strike a balance between everyday usability and high-performance capability. While they may require a little more warmth to reach their optimal performance, they offer significantly greater heat resistance before experiencing fade. Examples include EBC Redstuff and Yellowstuff, Mintex 1144, Brembo HP2000, Ferodo DS2500, Tarox Corsa, and Cosworth Track Master.

These pads are particularly well-suited for supercharged (SC) or turbocharged STs, which are generally faster and carry more weight, thus requiring more stopping power and heat management.

Track Pads

Dedicated 'track pads' are engineered for extreme heat and consistent performance during prolonged, hard braking, such as on a race circuit. Brands like EBC Bluestuff, Ferodo DS3000, Mintex 1155, and Tarox Competizione fall into this category. It's crucial to understand that these pads are generally not recommended for road use. They require significant heat to reach their operating temperature and provide optimal bite, meaning they may feel ineffective or even dangerous when cold during typical road driving. The compound is also very hard, which can alter the pedal feel considerably and potentially lead to increased disc wear on the road.

Brake Pad Comparison Table

Brake Discs: The Heat Dissipators

Brake discs, or rotors, are vital for dissipating the immense heat generated during braking. Their design significantly impacts braking performance, especially under demanding conditions. You'll find various types of discs available for the Ford ST, each with its own advantages:

• Plain Discs: These offer the maximum contact area with the brake pad, which can be beneficial for initial bite. However, they are less effective at shedding hot gases or preventing pad glazing (where the pad surface becomes shiny and less effective due to overheating).
• Grooved Discs: Featuring channels cut into the surface, these help to vent hot gases, clean the pad surface, and prevent glazing. They also help keep pad temperatures down by carrying pockets of colder air.
• Drilled Discs: With holes drilled through the disc, these also aid in gas dispersion and cooling. However, cheaper drilled discs can be prone to cracking, potentially leading to brake failure.
• Dimpled Discs: Similar to drilled but with shallower depressions, offering a compromise between plain and drilled without the same cracking risk.
• Drilled and Grooved / Dimpled and Grooved Discs: Combine the benefits of both designs.

For everyday driving and even fast road use, plain discs are perfectly adequate, especially when paired with appropriate pads. If you opt for larger discs, they will offer a greater surface area for the pad to bite onto, leading to increased braking power per wheel rotation and thus faster stopping. Grooved or drilled discs become more beneficial for fast road and track use, as they excel at maintaining lower operating temperatures.

Commonly Used Brake Discs for Ford ST

• Plain Discs: Excellent for standard daily driving and light fast road use.
• EBC Ultimax/Turbo Grooved Discs: A significant and well-priced upgrade over standard. Suitable for road, fast road, and track days.
• Tarox Sport Japan/F2000/G88's: A premium upgrade, heat-treated to resist warping. These are ideal for dedicated track cars or drivers demanding the absolute best, though they come at a higher cost than EBC options.

Brake Fluid: The Unsung Hero

Brake fluid is arguably the most overlooked component in the braking system, yet it plays a critical role. It's responsible for transferring the pressure from your brake pedal to the calipers, activating the pads against the discs. Brake fluid is hygroscopic, meaning it absorbs moisture over time, which lowers its boiling point and can lead to dangerous brake fade.

It's generally recommended that brake fluid be changed every two years, or more frequently if you engage in regular track driving. Most brake fluids are glycol-based, with common specifications being DOT 4 and DOT 5.1. Ford recommends DOT 4 for the ST, but higher-performance DOT 4 fluids are available from brands like Tarox and Motul, offering significantly higher boiling points.

Brake Fluid Boiling Points

Important: Do NOT confuse DOT 5.1 with DOT 5. DOT 5 is a silicone-based fluid and is incompatible with glycol-based systems. Using DOT 5 in a system designed for DOT 4 or DOT 5.1 would require a complete flush and cleaning of your entire brake and clutch system, as it can cause seals to degrade.

Brake Hoses: Enhancing Pedal Feel

While standard rubber brake hoses perform their job adequately, they can expand slightly under pressure, leading to a minor loss of pedal feel and potentially a spongy sensation. Upgrading to braided brake hoses, such as those from Goodridge or HEL, offers a firmer, more consistent brake pedal feel. These hoses are reinforced, preventing expansion and ensuring that all pedal pressure is directly translated to the calipers.

For a daily driver, this upgrade might not be strictly necessary, and you may not notice the full benefits. However, for STs used for fast road driving or track days, or for those aiming to optimise their braking system without going for a full big brake kit, braided hoses are an excellent modification. Kits for the Ford ST can often be found on eBay starting from around £40.

Calipers and Carriers: The Heart of the System

The standard calipers on the Ford ST are competent for stock power and typical road use. However, as you increase horsepower or drive the car more aggressively, you may find the standard setup lacking. Upgrading your calipers and carriers allows you to fit larger brake discs, which in turn significantly increases stopping power by providing more surface area for the pads to bite.

Common Caliper Upgrades:

• ST170/Mondeo Mk3 ST Calipers: You can upgrade the front and rear carriers to accommodate ST170 discs. A second-hand Mondeo Mk3 ST caliper kit can often be found more affordably than Focus ST170 calipers. A 300mm disc setup will typically fit behind some 15-inch wheels, but 16-inch wheels and above are generally safer and recommended.
• Focus Mk1 RS Brembos: With the correct mounting brackets, Focus Mk1 RS Brembo calipers paired with RS Mk1 discs allow your ST to run 324mm discs. These will fit behind some 16-inch wheels but are better suited for 17-inch wheels and larger.
• Aftermarket Calipers (e.g., Wilwood, Hi-Spec): If you wish to run a smaller 16-inch wheel while still benefiting from enhanced braking, certain aftermarket calipers can be paired with ST170-sized discs. These often offer lighter disc options compared to the 324mm setups.
• Big Brake Kits (e.g., Hi-Spec, Mountune, Tarox, AP Racing, K-Sport): For high-horsepower STs or dedicated track cars, comprehensive big brake kits are the ultimate upgrade. These kits come with everything needed for installation, including multi-piston calipers, larger discs, and bespoke mounting hardware. While an incredible performance boost, they are often overkill for day-to-day road use.

Ford ST Braking System Recommendations by Use

Choosing the right brake setup depends entirely on your driving style and the car's intended use. Here's a quick guide to help you decide:

1. Day-to-Day Driving

• Discs: Plain discs
• Pads: Standard (OEM) pads
• Fluid: Standard DOT 4 fluid

2. Day-to-Day Driving with Occasional Spirited B-Roads (e.g., MT165 ST)

• Discs: Plain discs or EBC grooved discs
• Pads: Fast road pads (e.g., EBC Greenstuff)
• Fluid: Standard DOT 4 fluid
• Hoses: Set of braided hoses

3. Fast Road and Occasional Track Days (e.g., MT185 ST)

• Calipers: ST170/Mondeo calipers (for larger discs)
• Discs: Plain or EBC grooved discs
• Pads: Fast road pads or fast road/track pads (e.g., Ferodo DS2500)
• Fluid: DOT 5.1 or Motul RBF600 fluid
• Hoses: Set of braided hoses

4. Fast Road/Track Day ST or Heavily Modified ST (e.g., MR200 or Mid-Powered SC/Turbo)

• Calipers: ST170/Mondeo calipers
• Discs: Tarox discs
• Pads: Ferodo DS2500 or similar fast road/track pads
• Fluid: Motul RBF660 fluid
• Hoses: Set of braided hoses

5. Dedicated Track Car or High-Powered ST

• Calipers: Focus Mk1 RS Brembos, or a full big brake upgrade kit (e.g., AP Racing, K-Sport, Tarox, Mountune)
• Discs: Grooved or drilled discs (specific to big brake kit)
• Pads: Fast road/track pads or dedicated track pads
• Fluid: Motul RBF660 fluid
• Hoses: Braided hoses (usually included in big brake kits)

Frequently Asked Questions About Ford ST Brakes

Q1: How much does a Ford ST brake pad cost?

For standard, OEM-replacement front brake pads for a Ford ST, you can expect to pay up to £40. However, costs vary significantly depending on the type and performance level of the pads. Fast road pads typically range from £50 to £100+, while dedicated fast road/track pads can cost between £80 and £150+. High-performance track-only pads can exceed £120-£200+ per set for the fronts. Remember, these are general estimates, and prices can fluctuate based on brand, supplier, and specific model.

Q2: When should I change my brake fluid?

It is generally recommended to change your brake fluid every two years. Brake fluid absorbs moisture over time, which lowers its boiling point and can compromise braking performance, especially under heavy use. If you frequently participate in track days or engage in aggressive driving, it's advisable to change your brake fluid much more often, perhaps annually or even after a few intensive track sessions.

Q3: Can I use track pads on the road?

While technically possible, using dedicated track pads on the road is generally not recommended. Track pads are designed to operate at very high temperatures and may not offer sufficient bite or performance when cold, which is typical for road driving conditions. This can lead to a dangerous lack of braking power in everyday situations. Furthermore, their hard compounds can increase wear on your brake discs and often generate more noise and dust.

Q4: What's the main difference between drilled and grooved discs?

Both drilled and grooved discs are designed to enhance braking performance by improving heat dissipation and gas expulsion. Grooved discs feature channels cut into the disc surface, which help to vent hot gases, clean the pad surface, and prevent glazing. Drilled discs have holes drilled through the disc, serving a similar purpose. However, drilled discs can be more prone to cracking under extreme thermal stress, particularly cheaper variants, whereas grooved discs generally offer a good balance of performance and durability without the same cracking risk.

Q5: Why should I upgrade my brake hoses to braided lines?

Upgrading to braided brake hoses from standard rubber lines offers a noticeable improvement in pedal feel. Rubber hoses can expand slightly under the hydraulic pressure of braking, leading to a somewhat spongy or less direct pedal. Braided hoses, being reinforced, resist this expansion, ensuring that more of your pedal input is directly translated to the calipers. This results in a firmer, more consistent, and more responsive brake pedal, which can significantly enhance confidence during spirited driving or track use.

Final Considerations

This guide provides a comprehensive overview of upgrading and maintaining your Ford ST's braking system. Remember that choosing the right components is crucial; putting the wrong pad or fluid in your system can actually make your brakes worse. Always ensure your brake components are fitted by a trusted and qualified professional. Investing in your brakes is investing in your safety and the overall performance of your beloved Ford ST.

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