6SpeedOnline - Porsche Forum and Luxury Car Resource - USCTrojanGT3's White GT4 Track Build w/ BBS Gold E88 Wheels & BBi Safety & Suspension

6SpeedOnline - Porsche Forum and Luxury Car Resource (https://www.6speedonline.com/forums/)

- Boxster / Cayman (https://www.6speedonline.com/forums/boxster-cayman-16/)

- - USCTrojanGT3's White GT4 Track Build w/ BBS Gold E88 Wheels & BBi Safety & Suspension (https://www.6speedonline.com/forums/boxster-cayman/415160-usctrojangt3s-white-gt4-track-build-w-bbs-gold-e88-wheels-bbi-safety-suspension.html)

USCTrojanGT3's White GT4 Track Build w/ BBS Gold E88 Wheels & BBi Safety & Suspension

Attachment 1
USCTrojanGT3's White GT4 Track Build w/ BBS Gold E88 Wheels & BBi Safety & Suspension Package

https://c1.staticflickr.com/9/8148/2...69e9fa2e_h.jpg
(Click on images for higher resolution)

We would like to present this White Cayman GT4 track build that we completed earlier this year. To turn her into a weekend track warrior, we gave it a proper setup with our complete BBi Autosport StreetCup Track Package along with other goodies from Cargraphics, Cobb Tuning, Schroth Racing, Tarett Engineering, and many more. After completion, this GT4 went straight to the track at Thunderhill with our friends from SP Motorsports from Northern California. Here are some pictures of the build progress that we would like to share:

Vehicle Specifications

Interior:

BBi Autosport GT4 Roll Bar Satin Black
BBi Autosport 991 GT3 / 981 GT4 Sub-Strap Bracket
Schroth Profi GT3 Harness

Engine/Transmission:

Cargraphic Exhaust
IPD Competition Intake Plenum
GT3 82mm Throttle Body
Cobb AP V3 W/ Custom BBi Calibration
Guard Transmission Pro LSD
SP Lightweight Flywheel & Clutch Assembly

Front Suspension Upgrades

BBi Bump Steer Kit Front
BBi Adjustable Thrust Arms Front Pair
BBi Adjustable Thrust Arm Bushings Front Pair
BBi Lower Control Arm Inner Spherical Bearing (Mono-ball) End Kit Front Pair
Tarett Engineering Adjustable Sway Bar End Link Front
Tarett Engineering Upper Shock Mounts

Rear Suspension Upgrades

BBi Rear Toe Adjustable Toe
BBi Adjustable Thrust Arms Rear Pair
BBi Adjustable Thrust Arm Bushings Rear Pair
BBi Lower Control Arm Inner Spherical Bearing (Mono-ball) End Kit Rear Pair
Tarett Engineering Adjustable Sway Bar End Link Rear

Wheels/Tires:

BBS E88s

Few shots of the car before at our last BBi Customer Private Track Day

https://c2.staticflickr.com/2/1509/2...f9dbac40_h.jpg
https://c2.staticflickr.com/2/1652/2...fc3039d6_h.jpg
https://c2.staticflickr.com/2/1685/2...7c14f6a3_h.jpg
https://c2.staticflickr.com/2/1645/2...080df641_h.jpg
https://c2.staticflickr.com/2/1646/2...7bf60666_h.jpg
https://c2.staticflickr.com/2/1468/2...cfdbc8eb_h.jpg

- Jerry@BBiAutosport.com

Here are some pictures of the suspension upgrades

https://c1.staticflickr.com/9/8615/2...19fcde1c_h.jpg
https://c1.staticflickr.com/9/8053/2...4a20db60_h.jpg
https://c1.staticflickr.com/9/8520/2...e6b262ac_h.jpg
https://c1.staticflickr.com/9/8530/2...40046d28_h.jpg
https://c1.staticflickr.com/9/8608/2...c950d7c9_h.jpg
https://c1.staticflickr.com/9/8086/2...c8127b05_h.jpg
https://c1.staticflickr.com/9/8071/2...990aec7f_b.jpg

Front Suspension Upgrades

BBi Bump Steer Kit Front
BBi Adjustable Thrust Arms Front Pair
BBi Adjustable Thrust Arm Bushings Front Pair
BBi Lower Control Arm Inner Spherical Bearing (Mono-ball) End Kit Front Pair
Tarett Engineering Adjustable Sway Bar End Link Front
Tarett Engineering Shock Mounts
Swift Springs

Rear Suspension Upgrades

BBi Rear Toe Adjustable Toe
BBi Adjustable Thrust Arms Rear Pair
BBi Adjustable Thrust Arm Bushings Rear Pair
BBi Lower Control Arm Inner Spherical Bearing (Mono-ball) End Kit Rear Pair
Tarett Engineering Adjustable Sway Bar End Link Rear
Swift Springs

BBi Autosport Front Bump Steer Kit

https://farm9.staticflickr.com/8680/...619ddc60_h.jpg

Helps eliminate bump steer by maintaining proper front end suspension Geometry
Utilizes misalignment rod ends of the arm to provide maximum articulation
Highly recommended for vehicles that have been lowered
Each kit includes pair of 2 Links

BBi Autosport Rear Adjustable Toe
https://c2.staticflickr.com/8/7697/2...1d076b07_h.jpg

Provides additional rear toe adjustment
OEM link is non adjustable and eccentric bolt provides limited adjustment range, causing excessive tire wear and handling issues.
Helps maintain proper rear end suspension geometry
Each kit includes pair of 2 Links

BBi Autosport Front & Rear Thrust Arm Kit

https://farm9.staticflickr.com/8594/...823c886d_h.jpg
https://c1.staticflickr.com/9/8595/1...fff7f2b3_h.jpg

Connects the Lower Control Arm to the subframe
Provides precision caster adjustability
Spacers included for setting stock or anti-squat and anti-dive configurations
Each Kit Includes Pair of 2 Links
Fits both front and rear axles

BBi Autosport Front & Rear Adjustable Thrust Arm Bushing Kit

https://c1.staticflickr.com/9/8584/1...dcf21b3a_h.jpg

Provides two eccentric mounting points
Used to adjust for increasing or decreasing wheelbase, and adjustable caster.
A must-have for extended lower control arms (GT3 control arms or eccentric monoballs) to correct for unintended caster change
Compatible with all stock Porsche 996 and 997 lower control arms (including Porsche Motorsport Cup arms)
Sold as a set of 2 or a Complete set of 4

BBi Autosport Lower Control Inner Spherical Bearing (Mono-ball) End Kit:

https://c2.staticflickr.com/8/7182/2...e06a7f19_h.jpg
https://c2.staticflickr.com/8/7747/2...e6a001fe_h.jpg

Upgrades 981 GT4 front and rear control arms to improve chassis response by eliminating rubber bushings
Improved inner bearing flange design. Slimmer and lighter than factory OEM & Cup style
High-strength sealed teel alloy spherical bearings, completely serviceable unlike the motorsports arm
Also fits all 986, 987, 996, 997 with upgraded GT3/RS OE front or rear split control Arms
Each kit includes a pair of 2 inner bearing flanges

Tarrett Front and Rear Adjustable Sway Bar End Links

https://farm1.staticflickr.com/437/1...67571dac_h.jpg

Simple bolt in replacement for the factory drop links
Left & right hand threaded rod-ends allow for simple length adjustment to eliminate swaybar preload
Correctly sized, precision, Teflon-lined rod-ends for smooth and quiet operation, long life, and high reliability. No wear and rattling problems, like those seen with other designs, due to undersized or low quality rod ends
Eliminates the factory compliant plastic drop link bushings that deflect under loading and quickly wear out
High misalignment, stainless steel spacers allow for superior bind free operation and corrosion resistance
Precisely connects the stock or adjustable swaybar to the front strut assembly for improved feedback and swaybar response
Overall length is adjustable to accommodate either stock or adjustable swaybar requirements

https://c1.staticflickr.com/9/8500/2...a8623b72_h.jpg
https://c1.staticflickr.com/9/8523/2...2b3c7646_h.jpg

To extract the more power and improve response, we installed the IPD and Cobb Power Package, along with SP Motorsport's lightweight clutch & flywheel kit.

IPD Competition Intake Plenum
GT3 82mm Throttle Body
Cobb AP V3

BBi Lightweight Clutch & Flywheel Installation

https://c1.staticflickr.com/9/8826/2...b78c9e4e_h.jpg
https://c1.staticflickr.com/9/8352/2...1d1a7299_h.jpg
https://c1.staticflickr.com/9/8283/2...f7514c31_h.jpg

BBi Porsche Cayman GT4 Lightweight Flywheel & Sport Clutch Kit

https://c1.staticflickr.com/5/4458/3...e515b27a_h.jpg

Product Link: https://www.bbiautosport.com/product...rt-clutch-kit?

https://c1.staticflickr.com/5/4445/3...72d656cc_h.jpg
https://c1.staticflickr.com/5/4467/3...efac187f_h.jpg
https://c1.staticflickr.com/5/4483/3...0f7b8ef1_h.jpg

The weight differences between the lightweight single mass versus OEM dual mass are 13.40 lbs vs 27.05 lbs, and 27.95 lbs versus 39.40 for the complete assembly. These significant weight savings helps improve throttle response and is a must upgrade for these cars.

https://c1.staticflickr.com/5/4448/3...5f656986_h.jpg
https://c1.staticflickr.com/5/4495/3...216256f0_h.jpg
https://c1.staticflickr.com/5/4459/3...dd7624d2_h.jpg
https://c1.staticflickr.com/5/4499/3...a9a18d46_h.jpg

IPD Competition Intake Plenum & GT3 82mm Throttle Body Installation

To improve airflow, we used the IPD Porsche 981 Competition Plenum to replace the restrictive factory plastic unit.

https://c1.staticflickr.com/9/8011/2...d64cbef2_h.jpg
https://c1.staticflickr.com/9/8083/2...e2a5ae82_h.jpg
https://c2.staticflickr.com/2/1575/2...45cbb8a0_h.jpg
https://c2.staticflickr.com/2/1575/2...45cbb8a0_h.jpg

BBi 981 Stage 2 Power Package with IPD Competition Plenum & Cobb Accessport V3 ECU Upgrade Package

https://c2.staticflickr.com/2/1630/2...46f326c2_h.jpg

981 IPD 82mm Competition Plenum

https://c2.staticflickr.com/2/1689/2...897a1918_h.jpg

https://c2.staticflickr.com/2/1626/2...661d3200_h.jpg
Custom IPD silicone Hose Designed to Perfectly fit The alarger 82mm Throttle Body

https://c2.staticflickr.com/2/1621/2...dbbb41c2_h.jpg
Diversion Splitter and Dimpled Interior

The new 981 Plenums also benefits from the internal dimpling effect that have been implemented on all Plenums moving foward. This internal dimpling allows us to control the boundary layer and maximize airflow. Just like a dimpled golf ball travels farther than a smooth golf ball. Controlled turbulent air creates less friction and "tumbles" over a given area more efficiently.

IPD 981 IPD 82mm Competition Plenums Features:

• Increases horsepower, torque, and boost responsibly optimizing air flow efficiency
• Utilizes diversion splitter and dimpled interior surface eliminate turbulence and increase air flow
• High quality cast aluminum construction
• Direct fit OEM replacement
• Larger 82mm competition plenum version available
• Made in USA

Side by Side Comparison Between the Factory and IPD 981 IPD 82mm Competition Plenums:

https://c2.staticflickr.com/2/1681/2...1e60c650_h.jpg

https://c2.staticflickr.com/2/1686/2...6e29f0e2_h.jpg

https://c2.staticflickr.com/2/1699/2...2c59ecc7_h.jpg

82mm vs 74mm Throttle Bodies

https://c2.staticflickr.com/2/1641/2...6b20a64f_h.jpg

https://c2.staticflickr.com/2/1580/2...51ffe42b_h.jpg

Cobb Tuning Porsche Cayman GT4 Accessport V3

https://c1.staticflickr.com/1/643/21...b803ff6c_h.jpg

Features

Simple Installation: Everything is included for the simple installation you can do in your driveway! Intuitive on-screen instructions identify your exact vehicle, saves stock vehicle data, and displays available OTS maps.
Change Maps: Store up to 100 maps from our OTS map database or from your favorite COBB tuner and quickly switch between them for any need.
Vehicle Upgrade Support: As you continue to modify your car, Accessport maps can be used to optimize performance upgrades. Changing the map can be done in less than 1 minute in your driveway.
In Car Mount: The Accessport can be mounted in vehicle to allow you to monitor the performance data.
Data Logging: Record multiple data channels simultaneously for in-depth evaluation of engine performance. Stores up to 1 hour of continuous data.
Gauges: Use your Accessport as a gauge to monitor boost or any other live information, directly from the ECU.
Trouble Codes: Read engine trouble codes to diagnose issues. Clear them when resolved. Prevent expensive trips to the dealership.
Full Uninstall: Using the Uninstall option will completely remove our programming from the car’s ECU. It is then able to be re-installed after a dealer visit or on another vehicle.

After the supension and power upgrades are in, we installed our Safety Package which includes Bolt-in Roll Bar, Sub-Strap Mount, and Shroth 6 point harnesses to properly secure the driver and provide additional protection.

https://c1.staticflickr.com/9/8100/2...b1993529_h.jpg
https://c1.staticflickr.com/9/8338/2...2b01e5f3_h.jpg

BBi Autosport GT4 Safety Package:

BBi Autosport GT4 Roll Bar Satin Black Finish
BBi Autosport GT4 Sub-Strap Mount
Schroth Profi GT3 6 Point Harness

Chrome moly steel tubing utilized for excellent strength to weight ratio
Modular construction to allow access to engine for servicing without removing entire roll bar
Shoulder harness mounting crossbar positioned at appropriate height as per Schroth's instructions
TIG welded and utilizes "X" braces on rear section for superior strength and rigidity
Mounts to frame structure and rear strut tower to provide strongest mounting points and maximum protection
Utilizes laser cut mounting plates & inner diameter tube clamps that are CNC turned and milled for a precise fit
Designed to work with stock or any aftermarket seats on the market
Minimal affect on seat travel to accommodate taller drivers
Can be used with stock seat-belts or 6 point harnesses for track use
Designed to work with wrap-around style harnesses while optional eyelet bolt provisions are available for clip-in harnesses
OEM fit & finish. The main hoop contours entire arch of the roof with an even curve
Finished in satin black powder coat. Other colors available
Bolt-in installation requires no drilling and minimal carpet trimming

Nice to see someone using RE-71s. Something I can't thanks to Porsche's tire size decision for the 981 Boxster Spyder.

I think this is the car I purchased from Porsche Barrington in January. Most of the trick bits have been removed but it is still an amazing car.
Beat my best time at Road America by 9 seconds first time out.