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BREMBO GT|TY3 2-PIECE DISC UPGRADE FOR THE PORSCHE CAYMAN GT4 (981)

BREMBO GT|TY3 2-PIECE 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 TY5 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 TY3 Sprint or TY5 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 TY5 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 TY3 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 TY3 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 TY3 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 TY5 endurance discs at Thermal Raceway. Photo: GMG Racing

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

Brembo Performance TY5 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 TY3 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
–          TY3 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
–          TY3 or TY5 “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
–          TY3 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

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NEW Brembo Racing system for the Nissan GT-R (R35)

New Brembo Racing system for the CBRD Speed Factory Nissan GT-R (R35).

This is a direct replacement for the front Brembo O.E. (Original Equipment) system which is already an extremely capable system, but this system is meant for environments with heavy brake demand.

The brake system is comprised of a lightweight Brembo Racing XB105 4-piston billet caliper, 25mm pad vs. 18.5mm (increased thermal resistance), and 2-piece, 380×34 type 3 discs that fit under the *OE wheels. ‪

For more information please contact:
sales@racetechnologies.com or call (714) 438-1118.

Imagery by CBRD (Chad Block Racing Development)

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Brembo Racing XB105 calipers have a very low mass and overall weight while improving braking performance (the slimmer profile is optimal for wheel fitment). 4-piston billet caliper, and removable stiffening bridge for fast pad changes (25mm pad vs. 18.5mm which increases thermal resistance).

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The thicker 25mm pad vs. 18.5mm OE pad increases thermal resistance (thermal barrrier) and also helps with overall pad life.

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4-piston billet caliper, 25mm pad vs. 18.5mm (increased thermal resistance), with 2-piece, 380×34 type 3’s that fit the *OE wheels. The rear utilizes the stock calipers.

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Sabelt x Corner 3 Motorsports

Corner 3 Motorsports, a stocking Sabelt authorized dealer in southern California specializing in high performance Japanese platforms supplied the following Sabelt products for Alex Rodriguez’s Time attack FD Rx7:

The Sabelt package:

– Sabelt GT160 Halo full bucket racing seat.
– Sabelt 6 Point 2 to 3 inch “HANS specific” harness.
– Sabelt SW633 330 mm suede steering wheel.

The Sabelt package offered the following advantages to the driver (based on driver comments):

– GT160 seat lowered the driving position so the drivers’ head (when using a helmet) no longer hit the roll bar of the vehicle.
– GT160 seat also improved driving position for better heel and toe downshifts.
– Sabelt 6 point harness fitted flush with the HANS Device and the submarine belt was much more comfortable. This was due to the 2 belt “split design” of the submarine belt.
– Sabelt steering wheel was thicker and more comfortable to use compared to the old steering wheel.

Corner 3 Motorsports focuses on three core philosophies: complete knowledge in the services they provide, specializing is only a few select Japanese platforms, and working with the most premium brands that best represent them. Corner 3 chooses Sabelt because Sabelt supplies safety components to professional motorsports, has a comprehensive product range to suit their clients needs and is a market leader in safety equipment.

Sabelt was founded in 1972 and part of the Brembo group since 2008, is a technology leader supplying safety equipment to the high performance and professional racing markets.

Contact Information:

Web: http://www.corner3garage.com
Address: 22701 Granite Way, Laguna Hills, CA 92653
Phone: 1-(949) 380-0801

Photos Provided by: Corner 3 Motorsports

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Alex’s time attack FD3S equipped with sabelt GT160 seats

Sabelt Steering Wheel

Sabelt Steering Wheel

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Brake Fluid – Brembo Racing

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.

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.

Dry Boiling Point – Top professional racing teams purchase brake fluid based on several variables that include but are not limited to: dry boiling point, compressibility, viscosity, pedal feel, consistency, and its ability to recover after boiling. While dry boiling point is important, a lot of performance gain can be had from a fluid which has strengths in a lower fluid compressibility.

Most of the dry boiling points* of the top racing brake fluids sold to professional motorsport teams are rated very high so to have substantial gains in fluid performance, other factors can be the focus of development.

 * NOTE: The only way to verify the exact boiling point of a brake fluid is to test it in a fluid lab as there is no industry wide standardized testing for fluid. To properly compare fluids and have accurate results: the test has to be done at the same lab, with exactly the same environment and conditions.

Compressibility/Viscosity – A brake fluid with low compressibility offers a more positive pedal feel which is more consistent during brake applications.

Recovery – The fluid’s ability to recover to its most optimal performance after boiling is a crucial factor in brake fluid performance.

Street Use – Most professional racing fluids are not suitable and/or approved for street. The Brembo LCF600+ is DOT approved and is suitable for street and track use.

Brembo Racing brake fluids are proven motorsport brake fluids with low compressibility, high boiling points, even under the highest temperatures and demanding conditions.

Brembo LCF600 Plus Typical Applications: Open Wheel, Stock Car, Rally, Endurance & Sprint GT**, Track Day

**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: 316 C (601 F)
– Wet Boiling Point: 204 C (399 F)
– Exceeds requirements of U.S. FMVSS 116 DOT 4
– MSRP: $19.95 / 500mL bottle

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Brembo Racing LCF600 Plus – 500mL

– Brembo Racing fluids can be mixed with other DOT 3 and DOT 4 racing brake fluids. For the best performance, a full flush with Brembo Racing fluid must be performed.
– Brembo Racing LCF600 Plus and HTC64T must not be used in Brake systems containing magnesium parts.

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
– MSRP: $ 36.00 / 500mL bottle

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Brembo Racing HTC64T – 500mL

– Brembo Racing fluids can be mixed with other DOT 3 and DOT 4 racing brake fluids. For the best performance, a full flush with Brembo Racing fluid must be performed.
– Brembo Racing LCF600+ and HTC64T must not be used in Brake systems containing magnesium parts.

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Sabelt GT200 and GT300 Seats

HCF (HYBRID CARBON FRAME)

HCF is a construction of additional structural carbon which shape strengthens and stiffens the shell. The new result is a hybrid shell, part in carbon and part in fiberglass, particularly performance and safe, that represents a true new seats generation for technique, performance and market.

– The back carbon reinforcement (HCF) stiffens the entire shell improving resistance in case of side impact
– The shape of carbon structure has been designed to strengthen the areas subject to higher loads
– Reinforcing the most stressed areas had allowed composing a plybook that enlightens the remaining areas, with consequent weight saving on the total shell.

DOUBLE HARNESSES SLOT

Provides adjustment of the height of the harness making the seat absorb part of energy in case of impact.

Proper belt placement insures the seat edge is utilized during a crash rather than drivers shoulders. With this target we doubled the shoulder belt adjusting slots to better adjustment for various driver heights. In this way, in case of impact, the vertical force will be supported by the seat improving safety of the driver.

COOLING VENTILATION HOLES INTEGRATED IN BACKREST

External temperature and driving conditions of the driver are one of the critical areas in which FIA is working to improve safety of crews.

The back, in the lumbar area in contact with the seat is even more complex. It is thanks to ergonomic studies made for OEM that we tested a solution that includes seatback holes allowing for hot air exchange to improve driver and co-driver cooling.

Starting price = $1,222.00

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HCF (Hybrid Carbon Frame)

GT200 GT300 (Doppio Passcint icon 01)

Double harness slots

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Rear shot of the cooling slots in the lumbar area.

Olsen Motorsports with their GT-200 race seats in their 2015 WRX STi.

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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

BREMBO-RB340-3502   Dagys_-2015_382945

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Why aren’t seat belts connected directly to the seat?

Seat belts fixed to the seat have some advantages. However, until now, there is no specific FIA standard that regulates the construction of the seat to make it resistant to the loads transferred from the belt in an accident.

The reason why it’s connected to instead to the body, is that the roll-bar is integral to the whole body and it’s able to dissipate impact energy better with a properly designed cage. It’s also able to resist better than a threaded connection built into a body of a composite material. Additionally, until a few years ago it was much easier to simulate the dynamic behavior of metals compared to composite materials, making the predictability in the event of an impact “safer” and the level of protection more reliable.”

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