BREMBO 2-PIECE TYPE 3 DISC UPGRADE FOR THE PORSCHE CAYMAN GT4 (981)

BREMBO 2-PIECE TYPE 3 DISC UPGRADE FOR THE PORSCHE CAYMAN GT4 (981):

GMG Racing Porsche 981 Cayman GT4

GMG Racing Porsche 981 Cayman GT4. Photo: GMG Racing

OFF THE SHOWROOM FLOOR AND STRAIGHT TO THE TRACK: The brand new Cayman GT4 (981) is Porsche’s lightweight platform specifically focused for the racetrack and track day enthusiasts.

THE PORSCHE 911 (991) DNA: Since most of the front end, upright, and suspension components on the Porsche Cayman GT4 are from the Porsche 991 GT3 (911), the Brembo OE (Original Equipment) brakes equipped on the Porsche Cayman GT4 are some of the most sophisticated designed for an OE application.

The Porsche 981 Cayman GT4 shares all the same front suspension and chassis components as a 991 GT3. Photo: GMG Racing

The Porsche 981 Cayman GT4 shares the same front end components as a 991 GT3. Photo: GMG Racing

GMG Racing 981 Cayman GT4 Front end

GMG Racing 981 Cayman GT4 Front end, upright and brake system.

CAYMAN GT4 VS. 911 GT3: The Porsche Cayman GT4 Brembo OE brakes utilize 6-piston aluminum fixed monobloc calipers front and 4-piston aluminum fixed monobloc calipers in the rear. The Cayman GT4 uses heavy duty 380 x 34 mm ventilated front & 380 x 30 mm rear brake discs similar to what is equipped on a Porsche 991 GT3. The Porsche Cayman GT4 brakes also uses a wide annulus (radial depth) front and rear pad for maximum swept area, heat dissipation, and pad life. The OE pads are also 18 mm thick front and rear which is comparable to most high performance aftermarket calipers.

Brembo OE brake system equipped on the Cayman GT4

Brembo OE brake system equipped on the Porsche Cayman GT4

HOW THEY DIFFER FROM EACH OTHER: While the Porsche Cayman GT4 and 991 GT3 are similar on paper in many ways, there are some of major technical differences between the Porsche 991 GT3 and Cayman 981 GT4.

Porsche 981 Cayman GT4 vs Porsche 991 GT3. Photo: GMG Racing

Porsche 981 Cayman GT4 vs Porsche 991 GT3. Photo: GMG Racing

These technical differences significantly affect overall brake balance setup and performance.

  • The Porsche Cayman’s suspension setup (especially the rear), geometry, and dynamic weight distribution is fundamentally different resulting in an overall chassis balance that is more sensitive to braking inputs than a GT3.
Cayman GT4 suspension geometry.

The Porsche Cayman GT4’s suspension geometry.

The Cayman GT4 is more sensitive to driver inputs, especially pitch under braking. Photo: GMG Racing

The Cayman GT4 is more sensitive to driver inputs, especially pitch under braking. Photo: GMG Racing

The Cayman’s inherent tendency to pitch more under braking increases front axle brake demand, but inherently results in unsettling the rear axle under braking. However, this can be tuned with managing the operating temperature of the brake disc and also by using different friction compounds that are optimized for the specific brake temperature windows.

Brembo Performance Type 5 endurance discs used to maximize disc life on the track.

Brembo Performance Type 5 endurance discs used to maximize disc life on the track.

Cayman GT4 Rear pad options help tune braking characteristics

Porsche Cayman GT4 Rear pad compound options help the driver tune braking characteristics

BREMBO DISC OPTIONS: The front Brembo 380 x 34 / 72 Vane racing disc used for the GT4 application are available in multiple configurations (standard or heavy duty and Type 3 Sprint or Type 5 Endurance) to help the user setup the brakes to suit their demands.

Brembo 380 x 34 Type 5 Endurance "heavy duty" front discs

Brembo 380 x 34 Type 5 Endurance “heavy duty” front discs

  • The Porsche’s Cayman GT4 is a true mid-engine platform with the engine sitting in front of the rear axle closer to the center of the chassis unlike the 991 GT3 which is a rear-engine platform with the engine sitting over the rear axle.
The Porsche Cayman GT4 is a mid-engine platform with the engine closer to the center of the chassis. Photo: GMG Racing

The Porsche Cayman GT4 is a mid-engine platform with the engine closer to the center of the chassis. Photo: GMG Racing

MID-ENGINE VS. REAR-ENGINE: A mid-engine platform will generally demand less out of the rear brakes compared to a rear-engine platform with all the weight sitting on the rear axle. The Cayman’s mid-engine design also inherently results in the rear axle getting unsettled easier under braking inputs.

Cayman GT4 rear can get unsettled under braking. Photo: GMG Racing

Porsche Cayman GT4 rear end can get unsettled under braking. Photo: GMG Racing

STABLE DISC TEMPERATURES: The rear Brembo 380 x 30 Type 3 racing disc, used for the GT4 application is offered in a 48 vane configuration. This 48 vane disc configuration stores more heat in the disc, which allows for more stable rear brake temperatures, resulting in improved disc life for the intended use.

Brembo 380 x 30 48 Vane Type 3 racing disc

Rear Brembo Performance 380 x 30 48 Vane Type 3 racing disc

  • The Porsche Cayman GT4 generally weighs 200 lbs less than a 991 GT3 (Cayman GT4 Curb Weight – 2955 lbs, 991 GT3 Curb Weight – 3150 lbs).

Overall weight and weight balance directly influence a vehicle’s brake demand. The Cayman GT4 with less overall weight (especially over the rear axle) will also demand significantly less out of the rear brakes compared to a 991 GT3.

  • The Porsche Cayman GT4’s bumper design and aerodynamics are different and more adjustable than a 991 GT3. The Cayman GT4 features an adjustable front diffuser and rear wing to increase downforce and grip versus the non-adjustable parts on the 991 GT3.
Cayman GT4 Rear wing and diffuser

The Porsche Cayman GT4 has an adjustable Rear wing to add rear downforce.

Bumper design has a significant influence on airflow to the brake system which results in different braking demands on the front and rear axles. Increased downforce and grip also affects brake balance and demand depending on the exact chassis setup.

Porsche Cayman GT4 front bumper with adjustable flaps integrated in the bumper

Porsche Cayman GT4 front bumper with adjustable flaps integrated in the bumper to increase brake cooling and downforce. Photo: GMG Racing

IN CONCLUSION: There are certain limitations with the OE components on any high performance application as they are designed specifically for the car manufacturers to their requirements of comfort, wear rates in various road environments, cost and serviceability.

As the braking system’s primary function is to dissipate heat, Brembo uses purpose-designed discs in order to increase the fade resistance and thermal capacity of the system. These discs are directionally ventilated for enhanced cooling and slotted for better performance and continuously refreshing the pad surface. Brembo Performance 2-piece discs are made up of a proprietary advanced cast-iron alloy which offers an exceptional coefficient of friction and resistance to thermal shock and fatigue.

Cayman GT4 OEM disc versus Brembo Type 3 disc assembly

Porsche Cayman GT4 Brembo OEM disc versus Brembo Performance Type 3 disc assembly

The same Brembo Racing discs trusted every weekend in professional motorsports are also utilized in the Brembo Performance Program (GT, GT-R & Race Systems).

GMG Racing team using Brembo Type V endurance discs. Photo: GMG Racing

GMG Racing team using Brembo Type 5 endurance discs at Thermal Raceway. Photo: GMG Racing

Brembo Type V 2-piece disc assemblies with rotor temperature paint

Brembo Performance Type 5 2-piece disc assemblies with rotor temperature paint for track use

GMG's Cayman GT4 Brembo OE brakes being swapped out for Brembo Performance 2-piece disc upgrades.

GMG’s Cayman GT4 Brembo OE brakes being swapped out for Brembo Performance 2-piece disc and Race Technologies pad upgrades


BENEFITS OF BREMBO 2-PIECE DISC UPGRADES:

  • OEM INTEGRATION: Brembo 2-piece disc upgrades are designed to work seamlessly with the OE calipers and systems (manufactured by Brembo for Porsche). This guarantees the utmost in safety and seamless fitment.
  • LIGHTWEIGHT: Disc assemblies include an outer iron disc with aluminum bell/hat and provide decreased corner weights to improve vehicle dynamics including handling, acceleration, and braking.
  • TYPE III SLOT PATTERN: Extensively used in professional motorsports, the Type III slot pattern offers a high initial response with excellent release characteristics.
  • HIGH THERMAL CAPACITY: Greatly improved thermal capacity and heat management over OE discs and other aftermarket discs in the market. This also improves braking performance and allows for greater longevity of the components.
  • FRICTION MATERIALS: Everything we learn by supporting top professional racing teams throughout the world goes into selecting the best brake pad options for all levels of street, track and racing use.

PACKAGES INCLUDE:

  1. Outer Brembo Type III discs (qty 2)
  2. 6061 T6 aluminum (machined from billet), hard anodized bell/hat
  3. Complete Brembo disc hardware (D-type bobbin) w/ anti-rattle springs. (Full Floating Option Available Upon Request).

BREMBO CAYMAN GT4 (981) 2-PIECE DISC OPTIONS:

FRONT BREMBO 2-PIECE DISC OPTIONS: 981 CAYMAN GT4 OE IRON EQUIPPED

MSRP COMPLETE AXLE SET: $1,895.00

981 Cayman GT4 Front disc specifications:

–          380 x 34 disc – Standard
–          Type III slot type
–          20 mm air-gap (wide air-gap for overall brake disc weight reduction)
–          72 vane ventilation
–          21 lbs – disc ring
–          23 lbs – complete 2-piece disc assembly

981 Cayman GT4 Front “High Thermal” disc specifications:

–          380 x 34 disc – High Thermal
–          Type III or Type V “Endurance” slot type available.
–          17 mm air-gap (narrow air-gap for the brake disc to have extra thermal capacity and durability under higher brake demand conditions)
–          72 vane ventilation
–          23 lbs – disc ring
–          24.5 lbs – complete 2-piece disc assembly
–          Compatible with 911 Turbo (991) Models

REAR BREMBO 2-PIECE DISC OPTIONS: 981 CAYMAN GT4 OE IRON EQUIPPED

MSRP COMPLETE AXLE SET: $1,895.00

981 Cayman GT4 Rear “High Thermal” disc specifications:

–          380 x 30 disc – High Thermal
–          Type III slot type
–          16 mm air-gap
–          48 vane ventilation
–          20 lbs – disc ring.
–          22 lbs – complete 2-piece disc assembly
–          Compatible with factory braking brake (e-brake)

PORSCHE CAYMAN GT4 (981) OEM DISC WEIGHTS – FOR REFERENCE:

– Front, 380 x 34: Approximately 24 lbs
– Rear, 380 x 30: Approximately 22.5 lbs

 

Brembo (General News) Brembo Performance Brembo Racing

Brembo 2-piece disc, brake fluid, and pad install on GMG Racing’s 991 GT3

GMG Racing 991 GT3 – Brembo Performance Install & Review

GMG Racing, an Official Brembo dealer, is one of the premier high performance and professional racing shops in Southern California who specialize in Porsche track preparation. GMG Racing’s background in professional racing campaigning multi-car efforts in the Pirelli World Challenge series with both Porsche and Audi FIA GT3 platforms. Using this extensive racing experience accumulated over the years, GMG Racing also offers up the same upgrades supplied by their technical partners that they trust on the racetrack.

James Sofronas, owner driver of GMG Racing, also owns a personal 991 GT3 shop car to showcase GMG’s capabilities on and off the track. One such way is by holding track day and driver training specifically for 991 GT3 owners at The Thermal Club raceway which is very demanding on brakes and tires.

GMG Racing 991 GT3 Trackday. Photo Credit : GMG Racing

GMG Racing 991 GT3 Trackday. Photo Credit : GMG Racing

One of the first major upgrades done to the GMG Racing’s 991 “WC-GT3” was improve the braking reliability, longevity, and performance under track use. GMG Racing swapped out the Porsche OE discs, pads and fluid on the 991 GT3 with Brembo 2-piece discs, Race Technologies pads, and Brembo Racing HTC64T fluid.

GMG Racing 991

GMG Racing 991 “WC-GT3”

INGREDIENTS REQUIRED:

  • Porsche 991 GT3
  • GMG Racing
  • Brembo 2-piece front disc assemblies.
  • Brembo 2-piece rear disc assemblies
  • Your choice of front and rear pads although Race Technologies TS20’s were used.
  • 6 bottles of Brembo HTC64T Racing brake fluid.
  • Tarett Engineering brake caliper studs (*optional, supplied by GMG Racing)
GMG Racing 991 GT3.

GMG Racing 991 GT3 in stock form.

BRAKE DISC COMPARISON

While the 991 GT3 has very sophisticated brakes for an OE brake package, there is always more that can be done with certain components to improve overall longevity and performance. The OE Porsche brake discs, pads and fluid are all engineered with comfort, serviceability and cost effectiveness in mind.

Brembo OE co-cast discs

Brembo OE co-cast discs

As the braking system’s primary function is to dissipate heat, Brembo uses purpose-designed discs in order to increase the fade resistance and thermal capacity of the system. These discs are directionally ventilated for enhanced cooling and slotted for better performance and continuously refreshing the pad surface. Brembo 2-piece discs are made up of a proprietary advanced cast-iron alloy which offers an exceptional coefficient of friction and resistance to thermal shock and fatigue.

The same Brembo Racing discs trusted every weekend in professional motorsports are also utilized in the Brembo Performance program (GT, GT-R & club race systems).

The OE 991 GT3 co-cast Brembo discs are sized 380 x 34 mm in the front and weigh 24 lbs, and 380 x 30 mm in the rear weighing at 23.4 lbs. The Brembo Racing Heavy Duty “HD” type V front disc assemblies are 24.5 lbs, and the rear Type III assemblies are 22 lbs. The 991 Turbo discs are substantially heavier than the GT3 discs as the Turbo models are harder on front brakes than the GT3 models. Brembo 2-piece disc assemblies on a 991 GT3 or Turbo will offer a net gain in weight savings.

Brembo Porsche OE discs vs Brembo Performance 2-piece disc assemblies

Brembo Porsche OE discs vs Brembo Performance 2-piece disc assemblies

There are many advantages to replacing the OE discs on a Porsche GT3 or Turbo, some of them are:

  • OEM Integration: Brembo upgrades are designed to work seamlessly with the OE Master, ABS and existing brake systems (Example: Integration with the rear parking brake)
  • Weight Savings: Reducing overall un-sprung weight helps improve vehicle dynamics such as handling, braking, and acceleration.
  • Durability: The Brembo discs for these Porsche disc assemblies come from the Brembo Racing program. These discs feature proprietary metallurgy which is resistant to fatigue, cracking, and are engineered for maximum longevity on the street or track.
  • Different Slot Types: Extensively used in professional motorsports, Brembo type III and type V disc face types can be used to tune or adjust the brakes’ technical characteristics to the chassis or driver.
  • Range: Brembo offers lightweight and heavy duty “HD” disc options to suit the needs of the driver, car model (Turbo or GT3) /setup and environment.
  • Replacements: Brembo replacement rings are comparably priced to OE, and when the Brembo discs are worn, only the outer disc ring and hardware needs to be replaced.
  • Drivability: Brembo 2-piece discs maintain the drivability of the OE brakes by using anti-rattle hardware. Brembo’s specific anti-rattle disc hardware utilizes a spring fastener in order to slightly preload the assembly which eliminates the noise (clattering) generally associated with floating discs.

Brembo OE Porsche disc vs Brembo 380 mm 72 vane racing disc

Brembo McLaren spring

Brembo McLaren spring

NOTE: Brembo’s specific anti-rattle hardware which is commonly used in high performance brake disc assemblies was actually developed in the 1990s. This innovation was initially engineered exclusively for the McLaren F1 supercar which is why the hardware is often nicknamed the “McLaren” spring.

 BRAKE DISC INSTALLATION

GMG technicians Ruben and Sergei (who drives a 997 Turbo himself) used their extensive Porsche know how to install the Brembo 2 piece disc assemblies on the GMG 991 GT3 shop car.

GMG Technicians working on GMG 991 GT3

GMG Technicians working on GMG 991 GT3

 FRONT DISC ASSEMBLIES

The OE front discs were the first to be installed. The Brembo performance 2-piece discs and Race Technologies pads are a direct replacement to the OE units. GMG made sure to push the pistons all the way back in to ensure proper stack width (2 pads and brake rotor total width). The Porsche center lock “lug” was then removed and the Brembo 2-piece disc assembly and pads were then installed. Once the Brembo performance disc assemblies were fitted, the OE Caliper was re-installed using brand new caliper studs. The entire process was done on the front right disc, and then the front left disc.

Porsche 991 GT3 OE front brakes

Porsche 991 GT3 OE front brakes

Porsche centerlock unit

Porsche centerlock unit

Brembo Porsche OE front disc vs Brembo 380 mm racing disc and pads.

Brembo Porsche OE front disc vs Brembo 380 mm racing disc and pads.

The Race Technologies TS20 compound was specified as the baseline pad since the car will be street driven and used on the track. The TS20 offers low noise, dust and good pedal feel. It is also an excellent dual purpose compound for street and light track use.

Brembo 2-piece disc assembly fitted

Brembo 2-piece disc assembly fitted

Brembo 2-piece disc assembly installed

Brembo 2-piece disc assembly installed

Since the GMG Shop car is also their test car, the car will see extended track time on many southern California circuits. A Brembo Type V 380 x 34 mm front disc was specified for the lowest disc and pad wear under heavy track conditions. An optional Race Technologies endurance compound was also supplied for dedicated track use.

  • Brembo Type V (endurance face type): motorsport developed face type with marginally less initial response compared to the type III face type. The Brembo Racing type V face type was also designed to have lower pad and disc wear for certain long distance endurance races (mostly 10, 12 and 24 hour races).

REAR DISC ASSEMBLIES

Once the front disc assemblies were installed, GMG then turned their attention to the rear discs and pads. The exact same installation procedure was followed for the rear disc assemblies as well. The rear right corner was installed first, and then the rear left corner was installed. GMG installed new caliper studs on the rear as well when re-installing the OE Porsche calipers. Race Technologies TS20 compound pads were used for the rears as the baseline pad.

Porsche 991 GT3 rear brakes

Porsche 991 GT3 rear brakes

Porsche OE 991 GT3 rear discs vs Brembo performance Type III discs

Porsche OE 991 GT3 rear discs vs Brembo performance Type III discs

Tarrett Engineering Caliper studs used by GMG Racing.

Tarett Engineering Caliper studs used by GMG Racing.

GMG installed Tarett Engineering caliper studs.

GMG installed Tarett Engineering caliper studs.

RT TS20 rear pads

RT TS20 rear pads

The Brembo Type III 380 x 30 mm rear brake disc was specified for optimum balance and brake release under heavy track conditions. This is because the 991 GT3 shifts its’ brake balance towards the rear under braking. The smooth release characteristics of the Brembo Type III face type can help a driver avoid rear tire in stop lock up while still maintaining optimum braking performance.

  • Brembo Type III (aggressive face type): motorsport developed face type with an emphasis on high initial response while maintaining a smooth pedal release.
Brembo 380 x 30 Type III rear disc fitted.

Brembo 380 x 30 Type III rear disc fitted.

Brembo Performance Type III rear discs installed on GMG 991 GT3

Brembo Performance Type III rear discs installed on GMG 991 GT3

As mentioned earlier in this article, the Brembo 2-piece disc assemblies are compatible with the Porsche factory parking brake. One does not have to compromise and lose the parking brake functionality when installing the Brembo disc assemblies.

BRAKE FLUID AND BLEED

Upgrading brake fluid for spirited, track or racing use is easily one of the most overlooked things when thinking of upgrading any component or part of the brake system. Brembo’s HTC64T brake fluid is the top fluid used in the top professional racing categories around the world (Examples: F1, FIA GT, LMP1). This is because the Brembo fluid offers low compressibility, good after boil recovery, and high boiling points.

  • Brembo HTC64T Typical Applications: Open Wheel*, Stock Car, Rally, Endurance & Sprint GT**, Track Day.

*Brembo HTC64T is one of a very few select fluids being actively used by F1 teams.

**Brembo HTC64T and LCF600 Plus are both racing brake fluids which are actively used and homologated for FIA GT3 & GTE based sports-car racing.

  • Independently proven low Compressibility at severe temperatures.
  • Dry Boiling Point: 335 C (635 F)
  • Racing Use Only
Brembo HTC64T

Brembo HTC64T (used in F1, FIA, GT, LMP1)

Brake fluid performs a very critical function as it is the “life blood” of the brake system, as it is the foundation to hydraulically transfer brake pedal effort to the brake caliper’s pistons. Brake fluid also performs a vital function of lubricating caliper piston seals brake fluid performance (or the lack of) can directly affect brake pedal feel, pressure and consistency through the operating temperature range. It is also one the most cost effective ways to improve brake pedal consistency (avoiding spongy pedal) under high temperature use.

Once the Brembo performance 2-piece disc assemblies and RT pads were installed on all four corners, the OEM brake fluid was flushed and bled with Brembo Racing HTC64T brake fluid. As the fluid was being bled on each corner, GMG made sure to keep an ample amount of new fluid filled in the master cylinder reservoir to ensure that air did not enter into the hydraulic system.

Brembo fluid bleed

Brembo fluid bleed

Brembo HTC64 being poured in

Brembo HTC64 being poured in

ON TRACK IMPRESSIONS

To evaluate the results of the new Brembo discs, fluid bleed, and RT pads, the GMG Team took the 991 GT3 shop car to Thermal Club.

Driver (James Sofronas) and GMG Team comments: Testing out a new setup @thethermalclub today! @jamessofronas had the GMG 991 GT3 out and with the new Brembo Brake pad and Rotor setup says that the car is even more amazing! A predictable pedal feel without activating the ABS too early. A must have for any car that is going to see some track time! Combined with Pirelli Trofeo R tires it is just a winning combo!

Thermal Club Track layout. Image: Thermal Club

Thermal Club Track layout. Image: Thermal Club

Thermal Club located in Palm Springs, California often has very high ambient temperatures which can be demanding on the car, tires, and brakes. The effectiveness of brake cooling is only as good as the temperature of the air flowing thru the brake ducts (if the ambient air is hotter, the brakes will not cool down as much). The track layout and surface can be very similar to some of the European GT tracks, featuring many high speed to low speed braking zones, and a high level of mechanical grip (the more grip you have, the harder you can brake). GMG Racing has setup their shop GT3 understanding the demands of the various tracks around Southern California, and the Porsche 991 GT3, for optimal results.

GMG Racing 991 GT3 and R8 LMS Ultra at Thermal

GMG Racing 991 GT3 and R8 LMS Ultra at Thermal

Modern sports cars have very sophisticated OE ABS systems and engaging the ABS under braking can lead to poor threshold braking, lack of pedal feel, and potentially result in a slower lap time. Having a high overall level of braking confidence and control, usually allows the driver to spend less time on the brake pedal. If the brakes offer enough performance and control for the driver to stay out of ABS engagement (depending on their driving style and car setup), the result is usually a faster lap time on track.

Brembo (General News) Brembo Performance

2015 Nurburgring 24 Hour

2015 ADAC Zurich 24 Hours of Nurburgring

Congratulations to Belgian Team WRT (Drivers:Christopher Mies, Nico Müller, Edward Sandström and Laurens Vanthoor) for winning the 2015 Nurburgring 24 hour race. This is also the inaugural debut and first win of the new 2015+ spec Audi R8 LMS at the Nurburgring 24 hour event. This is the second consecutive time in 2 years that Audi Sport have won the 24 hour race at Nurburgring with the Audi R8 LMS platform. Audi Sport Team WRT completed an overall of 156 laps to win the tough 24 hour race which featured very close racing. With only a 40 second gap to second place, this year featured the closest finish ever for the 24 hour event.

2015 NBR 24 hour winner - Audi R8 LMS by Team WRT. Photo Credit : Audi Sport

2015 NBR 24 hour winner – Audi R8 LMS by Team WRT. Photo Credit : Audi Sport

At the end of the 2015 24 hour race, 3 out of the top 5 and 6 out of the top 10 overall were equipped with Brembo Racing brakes. The winning Belgian Team WRT Audi R8 LMS was also equipped with Brembo Racing RB340 endurance racing pads. Audi Sport equips Brembo Racing brake systems and Brembo RB340 pads on all 2015+ spec Audi R8 LMS cars.

2015 24 Hours of Nurburgring – Top 10 Results

  • First: #28 – Audi Sport Team WRT, Audi R8 LMS – Brembo Racing equipped
  • Second: #25 BMW Sports Trophy Team Marc VDS, BMW Z4 GT3
  • Third: #44 – Falken Motorsports, Porsche 997 GT3-R – Brembo Racing equipped
  • Fourth: #26 BMW Sports Trophy Team Marc VDS BMW Z4 GT3
  • Fifth: #5 Black Falcon, Mercedes-Benz SLS AMG GT3 – Brembo Racing equipped
  • Sixth: #17 Walkenhorst Motorsport, BMW Z4 GT3
  • Seventh: #29 – Audi Sport Team WRT, Audi R8 LMS – Brembo Racing equipped
  • Eighth: #11 – Bentley Team HTP, Bentley Continental GT3 – Brembo Racing equipped
  • Ninth: #35 – Nissan GT Academy Team RJN, Nissan R35 GT3
  • Tenth: #33 – Team Premio, Mercedes-Benz SLS AMG GT3 – Brembo Racing equipped
Bentley Continental GT3 running for the first time at Nurburgring 24. Photo Credit: Team HTP Motorsport.

Bentley Continental GT3 running for the first time at Nurburgring 24. Photo Credit: Team HTP Motorsport.

Brembo Racing RB340

The Brembo RB340 material offers excellent wear resistance, high initial bite, stable friction levels (the performance does not degrade as much at elevated temperatures) and good modulation in a wide range of conditions. Brembo’s RB340 material is unique in construction as the optimal performance of the material is dictated by the energy of the brake system, not specifically the braking surface running temperature. This also means the material performance can be stable in a wide temperature range. The combination of wear resistance and a high initial attack means the driver does not need to use as much pedal effort to achieve the optimum stopping power and potentially fewer brake pad / disc changes in an endurance race.

Photo Credit: Aston Martin Racing

Photo Credit: Aston Martin Racing

2015 24 Hours of Nurburgring – Overview

The 24 hour endurance event which has been running since 1970 and is one of the most important races that car manufacturers running FIA GT3 based cars (which is increasingly becoming the global platform for GT racing) focus on. Many teams, car manufacturers (Examples: Audi, AMG, Porsche, Subaru, Hyundai) and technical suppliers even have facilities near the Nurburgring for extensive testing of professional racing and production based cars. The 2015 24 hour endurance event had over 150 entries which included factory supported FIA GT3 spec cars as well as privateer teams running cars such as the BMW E46 M3, Subaru Impreza WRX STi, Opel Astras and Volkswagen GTi which all race on the same circuit in separate classes.

2015 Nurburgring 24 - SP3T Class winning Subaru WRX STI NBR equipped with Brembo brakes. Photo Credit: Subaru Global

2015 Nurburgring 24 – SP3T Class winning Subaru WRX STI NBR equipped with Brembo brakes. Photo Credit: Subaru Global

The Nurburgring circuit is very difficult, fast, unforgiving and over 15 miles in length to complete one lap. 2015 featured several mandatory “slower speed zones” for driver and spectator safety as the modern GT3 specification cars are just as fast, if not faster than previous years in which they can easily hit 300 km/h plus on the straightaways. The reduced speed sections meant that teams could potentially add more down force and focus on overall grip versus overall top speed. With more down force comes the ability for higher braking performance. The 24 hour race always features changing grip levels on the track, slow & fast blind corners, rain, black ice and very fast straightaways which end in long as well as heavy brake zones. With the addition of “slow zones”, sudden traffic build up was a major factor as well especially at night-time. Brakes must offer a high level of performance, control, be consistent and have low wear (fewer pad changes in an endurance race means less time lost in the pits).

Falken Motorsport GT3-R with Brembo Type 3 discs. Photo Credit : Falken Motorsport

Falken Motorsport GT3-R with Brembo Type 3 discs. Photo Credit : Falken Motorsport

5th place finishing Black Falcon SLS AMG GT3. Photo Credit : Black Falcon Racing Team

5th place finishing Black Falcon SLS AMG GT3. Photo Credit : Black Falcon Racing Team

The Nurburgring circuit and the 24 hour race in Germany is regarded as one of the most demanding events in the world on teams, equipment, and drivers. It is the event where the latest and most cutting edge professional GT sports car technology is showcased.

Brembo (General News) Brembo Racing

Brembo Brake Discs: Face Types

HOW DISC FACE TYPES (SLOT / GROOVE TYPES) AFFECT BRAKE PERFORMANCE:

Brake discs are one of the major brake tuning options which a professional race team has at their disposal at any typical race weekend. There are many subtle changes that can be made to a brake disc casting or configuration which can drastically influence braking characteristics. A brake disc’s face type (slot / groove pattern) is one of those changes, and can influence many braking characteristics.

Some of them are:

  • Initial response (bite)
  • Control and modulation
  • Release
  • Pad wear
  • Disc wear
Brembo Racing Type III Discs installed on GMG Twin Turbo Audi R8

Brembo Racing Type III Discs installed on GMG Twin Turbo Audi R8

There are also many variables which are considered when engineering a brake disc face type. Changing some of these variables can drastically influence the overall performance of the brake disc. Some (of the many) variables which are taken into consideration for brake disc slot design are:

  • Slot depth
  • Slot angle
  • Length of slot
  • Number of slots
Audi R8 LMS with Brembo 370 mm Type 1 racing discs in the front. Photo: James Boone

Audi R8 LMS with Brembo 370 mm Type 1 racing discs in the front. Photo: James Boone

Brembo and Brembo Racing primarily offer 4 different brake disc face patterns based on the application, intended use, driver preference, and other technical requirements of the application or chassis.

Drilled: drilled brake discs are suitable for a wide range of applications, operating temperatures and driving environments (especially wet weather).

  • Benefit: offers the highest initial response of all the available disc face types while continuously refreshing the braking surface and being also typically a bit lighter.
  • Drawback: Drilled discs are generally more prone to heat checking and thermal cracking if used consistently at extremely high temperatures. This however, really depends on the track, driver, and chassis setup.
Brembo drilled disc assembly

Brembo drilled disc assembly

Type I: Brembo “8 straight – slot” face type with an emphasis on stable brake feel and improve resilience against thermal cracking.

  • Benefit: stable braking feel at all temperatures, low disc wear, and continuously refreshing the braking surface for optimum performance.
  • Drawback: The Type 1 standard disc face has the lowest “initial response” or “bite” compared to Brembo Drilled, Type III or Type V discs.
Brembo Type 1

Brembo Type 1 “8 slot” disc assembly

Type III (aggressive face type): motorsport developed face type with an emphasis on high initial response while maintaining a smooth pedal release.

  • Benefit: highest overall braking confidence, control, and allows driver to spend less time on the brake pedal. When chasing the fastest lap time, less time on the brake pedal typically leads to a quicker lap time.
  • Drawback: Any disc with an aggressive face type like the Type III will have a higher chance to mechanically abrade the pad and disc surface leading to quicker or uneven pad wear. However, this really depends on variables such as car setup or track layout.
Brembo Type III Disc assembly

Brembo Type III Disc assembly

Type V (Endurance face type): motorsport developed face type with marginally less initial response compared to the type III face type. The Brembo Racing type V face type was also designed to have lower pad and disc wear for certain long distance endurance races (mostly 10, 12 and 24 hour races).

  • Benefit: braking modulation and control similar to Type III, while offering lower overall pad and disc wear on the track.
  • Drawback: While the most well balanced of all Brembo face types, Type V discs generally do not have as high of an initial response compared to the Type III.
Brembo Type V Disc assembly

Brembo Type V Disc assembly

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Brembo / Sabelt – FIA WEC at Silverstone

The opening round for the 2015 FIA WEC Championship was a very close 6 hour endurance race at Silverstone which saw great results for Brembo brake equipped teams in the factory LMP and GT classes.

LMP1:

  • 1st Place: Audi Sport – Team Joest, Audi R18 E-Tron Quattro
  • 2nd place: Porsche Team, Porsche 919 Hybrid

Both Audi and Porsche LMP1 Prototypes were equipped with Brembo Racing carbon-carbon brakes.

– Brembo’s specific carbon-carbon materials can give the drivers better feedback, control and modulation over other tested materials.

Audi and Porsche LMP1 cars were also equipped with Sabelt harnesses. (Sabelt, a technology leader in safety equipment, is part of the Brembo group).

– Sabelt aluminum adjusters that Audi Sport are using were optimized using FEA (Finite Element Analysis). This process allows for maximum weight reduction without compromising on strength.

LM GTE – Pro

  • 1st Place: AF Corse, Ferrari 458 Italia
  • 2nd Place: Porsche Team Manthey, Porsche 911 RSR
  • 3nd place: AF Corse, Ferrari 458 Italia

The Ferrari 458 Italia GTE and Porsche 911 RSR is equipped with Brembo Racing cast iron brake systems (Calipers & Brake discs).

The FIA World Endurance Championship (WEC) is starting to become the leading series by many car manufacturers and their technical partners to showcase new technologies in the LMP (Le Man Prototype) & GT (Grand Touring) Classes. The FIA WEC features endurance races (including the 24 hours of Le Mans) and is a global series racing at challenging circuits in the United States, Europe, Asia and the Middle East.

Stiff competition between factory run and private customer teams in all the classes means the top teams work with only the best technical partners to have the most competitive advantage.

Photo Credits: Porsche, Audi Sport

Audi Sport R18 E-Tron Quattro

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Porsche 919 Hybrid & 911 RSR

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Brembo Racing RB340

One of the top teams participating in the FIA WEC series is Larbre Competition, one of the only teams in the world racing with the Corvette platform as a non factory effort in the top level of professional motorsport. For 2015, Larbre Competition is racing a C7.R in the FIA WEC series.

The FIA World Endurance Championship (WEC) is starting to become the leading series by many car manufacturers and their technical partners to showcase new technologies in the LMP (Le Man Prototype) & GT (Grand Touring) Classes. The FIA WEC features endurance races (6 hour races and the 24 hours of Le Mans) and is a global series racing at challenging circuits in the United States, Europe, Asia and the Middle East. Stiff competition between factory run and private customer teams in all the various classes means teams choose to work with only the best technical partners to have the most competitive advantage.

Larbre Competition won class honors with a Corvette C6.R at the 24 hours of Le-Mans in 2012 using Brembo Racing RB340 brake pads. Larbre Competition also finished the 2012 Le Mans 24 hour race without changing brake pads or loss of performance through the race.

Brembo’s RB340 material is unique in construction and the optimal performance is dictated by the energy of the brake system, not so much the disc or pad direct running temperature. This means the material offers excellent wear resistance, high initial bite, stable friction levels (the performance does not degrade as much at elevated temperatures) and good modulation in a wide range of conditions. The combination of wear resistance and high initial attack means the driver does not need to push the brake pedal as hard to achieve the same stopping power. This is easier on the driver and means a common material can be potentially used for long and short races.

Brake pads and fluid are two very small things that make a huge difference that most people overlook. Pads and fluid help fine tune brake system characteristics like initial response, fade resistance, and pedal consistency. For an endurance race such as a 24 hour race, one of the many critical factors is the wear resistance of friction materials to avoid doing brake pad or rotor changes as this can cost valuable time in the pits. If changing pads or brake discs can be avoided altogether, this is the most ideal scenario.

Photo: Brembo Racing, John Dagys/Sportscar365

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PORSCHE 911 GT3 (991): BREMBO 2-PIECE TYPE III DISCS

PORSCHE 911 GT3 (991): BREMBO 2-PIECE TYPE III DISCS

Porsche’s 911 GT3 (991) is a demanding platform on the OE brake package with unique demands (475 horsepower, over 3200 lbs curb weight, and multiple electronic braking / traction aids). The Brembo OE brakes equipped on the Porsche 911 GT3 & Turbo models are some of the most sophisticated designed for an OE application. The Porsche Brembo OE brakes utilize 6-piston aluminum fixed monobloc calipers front and 4-piston aluminum fixed monobloc calipers rear. The brake discs are heavy duty 380 x 34 mm ventilated front & 380 x 30 mm rear brake discs. The Porsche 911 GT3 brakes use a wide annulus (radial depth) front and rear pad for maximum swept area. The OE pads are also 18 mm thick front and rear which is comparable to most high performance aftermarket calipers.

Generally speaking about later model 911 platforms: The GT3 has always been more demanding on the rear brakes due to aggressive rear brake balance while the Turbo models are generally more demanding on the front brakes. While the OEM specification Porsche brakes all look similar, the caliper piston sizes, hydraulic systems and car balance can be considerably different.

There are certain limitations with the OE components on any high performance application as they are designed specifically for the car manufacturers to their requirements of comfort, wear rates in various road environments, cost and serviceability.

As the braking system’s primary function is to dissipate heat, Brembo uses purpose-designed discs in order to increase the fade resistance and thermal capacity of the system. These discs are directionally ventilated for enhanced cooling and slotted for better performance and continuously refreshing the pad surface. Brembo 2-piece discs are made up of a proprietary advanced cast-iron alloy which offers an exceptional coefficient of friction and resistance to thermal shock and fatigue.

The same Brembo Racing discs trusted every weekend in professional motorsports are also utilized in the Brembo Performance Program (GT, GT-R & Race Systems).

GMG 991 GT3 with Brembo Type III 2 piece discs. Photo Credit : GMG Racing

GMG 991 GT3 with Brembo Type III 2 piece discs. Photo Credit : GMG Racing


BENEFITS OF BREMBO 2-PIECE DISC UPGRADES:

  • OEM INTEGRATION: Brembo 2-piece disc upgrades are designed to work seamlessly with the OE calipers and systems (manufactured by Brembo for Porsche). This guarantees the utmost in safety and seamless fitment.
  • LIGHTWEIGHT: Disc assemblies include an outer iron disc with aluminum bell/hat and provide decreased corner weights to improve vehicle dynamics including handling, acceleration, and braking.
  • TYPE III SLOT PATTERN: Extensively used in professional motorsports, the Type III slot pattern offers a high initial response with excellent release characteristics.
  • HIGH THERMAL CAPACITY: Greatly improved thermal capacity and heat management over OE discs and other aftermarket discs in the market. This also improves braking performance and allows for greater longevity of the components.
  • FRICTION MATERIALS: Everything we learn by supporting top professional racing teams throughout the world goes into selecting the best brake pad options for all levels of street, track and racing use.

PACKAGES INCLUDE:

  1. Outer Brembo Type III discs (qty 2)
  2. 6061 T6 aluminum (machined from billet), hard anodized bell/hat
  3. Complete Brembo disc hardware (D-type bobbin) w/ anti-rattle springs. (Full Floating Option Available Upon Request
GMG Racing 991 GT3 Equipped with Brembo Racing discs. Photo Credit: GMG Racing

GMG Racing 991 GT3 Equipped with Brembo Racing discs. Photo Credit: GMG Racing

BREMBO 911 GT3 (991) 2-PIECE DISC OPTIONS:

FRONT BREMBO 2-PIECE DISC OPTIONS: 911 GT3 OE IRON EQUIPPED

MSRP COMPLETE AXLE SET: $1,895.00
911 GT3 Front disc specifications:

–          380 x 34 disc – Lightweight
–          Type III slot type
–          20 mm air-gap (wide air-gap for overall brake disc weight reduction)
–          72 vane ventilation
–          21 lbs – disc ring
–          23 lbs – complete 2-piece disc assembly
–          Compatible with 911 Turbo (991) Models

911 GT3 Front “High Thermal” disc specifications:

–          380 x 34 disc – High Thermal
–          Type III or Type V “Endurance” slot type available.
–          17 mm air-gap (narrow air-gap for the brake disc to have extra thermal capacity and durability under higher brake demand conditions)
–          72 vane ventilation
–          23 lbs – disc ring
–          24.5 lbs – complete 2-piece disc assembly
–          Compatible with 911 Turbo (991) Models

REAR BREMBO 2-PIECE DISC OPTIONS: 911 GT3 OE IRON EQUIPPED

MSRP COMPLETE AXLE SET: $1,895.00

911 GT3 Rear “High Thermal” disc specifications:

–          380 x 30 disc – High Thermal
–          Type III slot type
–          16 mm air-gap
–          48 vane ventilation
–          20 lbs – disc ring.
–          22 lbs – complete 2-piece disc assembly
–          Compatible with factory braking brake (e-brake)
–          Compatible with 911 Turbo (991) Models

PORSCHE 911 GT3 (991) OEM DISC WEIGHTS – FOR REFERENCE:

– Front, 380 x 34: 24 lbs
– Rear, 380 x 30: 23.4 lbs

PORSCHE 911 Turbo (991) OEM DISC WEIGHTS – FOR REFERENCE:

– Front, 380 x 34: 27.8 lbs
– Rear, 380 x 30: 24 lbs

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2015 BREMBO RACING AND PORSCHE MOTORSPORTS INVOLVEMENT:

Brembo Racing works very closely with Porsche Motorsport as a technical partner on multiple factory motorsport programs. Some of these include, but are not limited to, the 2015 spec Porsche 919 Le Mans Prototype program for the LMP class and the 911 (991) RSR for the GT Class. The 919 Hybrid is Porsche Motorsport’s latest fully factory supported effort since 2014 and features various cutting edge technologies which will eventually be carried through to road going vehicles.

LMP Class:

For 2015, to be competitive in the top prototype class, the Porsche 919 Hybrid has been re-engineered from the ground up. One of the many key changes is a Brembo Racing carbon brake package to maximize braking performance and reliability since the new 2015 model has an upgraded chassis, aerodynamics and has more power compared to 2014.

Brembo Racing Porsche 919 brake package:

Brake Calipers: Brembo Racing motorsport calipers.
Brake Discs: Brembo Racing carbon-carbon brake discs.

2015 Porsche 919 Hybrid LMP1 Car. Photo Credit: Porsche AG

2015 Porsche 919 Hybrid LMP1 Car. Photo Credit: Porsche AG

GT Class:

Porsche’s 911 (991) RSR is built to compete at the 24 hours of Le Mans and is the most sophisticated GT racing sports-car offered by Porsche Motorsport unlike the Cup Cars designed generally for customer / private teams. The 991 RSR is also specified with a Brembo Racing cast iron brake package. Teams can choose disc and pad configurations based on their individual car balance, setup, circuit and brake demand.

Brembo Racing Porsche 991 RSR brake package:

Brake Calipers: Brembo Racing motorsport calipers (6 piston – front, 4 piston – rear)
Brake Discs: Brembo Racing 380 mm and 355 mm cast iron brake discs.

Brembo is the OE brake supplier to Porsche, offering Performance upgrades for the various 991 platforms (Carrera S, GT3, Turbo models) using similar components and technology developed for professional motorsport.

MOTORSPORTS IMAGERY
Photo Credits: James Boone, Porsche Motorsport

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