BBiAutosport

Attachment 1344394
BBi Autosport Porsche 981 GT4
StreetCup Weekend Track Car Build



As Porsche Cayman GT4s are currently some of the hottest Porsches on the market now and keeping us very busy, we would like to present this new weekend track car build that we have recently completed here at BBi Autosport. The owner flew down from Seattle to pick up this brand new Agate Grey Metallic GT4 from Newport Beach Porsche dealership and brought it over to us straight from the showroom floor. To make her better suited spirited driving and track duties, we installed our BBi Street Cup Suspension, Harness Bar, and Brembo Brake Upgrades for improved chassis response and braking performance. Once completed, the owner flew back down to take delivery of the car and drove it straight to Laguna Seca Raceway for a PCA Golden Gate Region track event and then cruise back home. Here are some detailed pictures of the build process and upgraded parts that we would like to share below.

Build Specifications

Safety

• BBi 981 GT4 StreetCup Harness Bar Finish: Satin Black

Suspension

• BBi 981 GT4 Adjustable Thrust Arm Bushings Front Pair
• BBi 981 GT4 Front Adjustable Thrust Arms
• BBi 981 GT4 Rear Toe Kit
• Tarrett Adjustable Front Sway Bar End Links
• Tarrett Adjustable Rear Sway Bar End Links
• Corner Balance & Alignment

Brake Upgrades

• Brembo TS20 Front Brake Pads
• Brembo TS20 Brake Pads Rear
• Brembo Racing HTC64T High Temperature Brake Fluid

Exterior

• Xpel Ultimate Full Nose Clear Bra Wrap (Headlights excluded as per Porsche's recommendations)
• Xpel Ultimate Rockers Clear Bra Wrap
• Xpel Ultimate Rear Bumper Partial Coverage.

To properly install harnesses and increase protection, we installed our BBi 991 GT3 Street Cup Harness Bar coated in Satin Black as the first upgrade. Our bar features 4130 chrome moly steel tubing for excellent strength to weight ratio and addresses issues such as harness angle, seat travel, and engine compartment access. With our sensible design approach, the bar mounts to frame structure in the cabin and rear strut towers to provide the strongest mounting points and maximum protection. For superior strength and rigidity, high strength 4130 chrome moly steel tubing was used throughout and all joints are meticulously TIG welded by hand. Bolt-in installation is accomplished by using Inner Diameter Tube Clamps that are CNC turned and milled for a precise fit. These unique joints allow us to eliminate the more traditional slip fit tubes with an unsightly through-bolt and nut. Consistent with our design philosophy, the final result is a bar that is clean & functional.

BBi 981 GT4 StreetCup Harness Bar



Key Features

• Chrome moly steel tubing utilized for excellent strength to weight ratio
• Modular construction to allow access to engine for servicing without removing entire harness 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 effect 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[/SIZE]

Interior removed as the first steps to install the bar







Plastic interior pieces carefully trimmed using our new templates that are included with all orders moving forward





- Jerry@BBiAutosport.com

BBiAutosport

Rear Carpet carefully trimmed using our template






Time for the bar to get installed into the car.

Mech33

Looking good! What do you guys think about only cutting along this line instead (so that the cut line is magically hidden from view behind the bar when installed)?

BBiAutosport

Mech33,

That is a good suggestion but we prefer to make smaller cuts as opposed to a much larger cut. Since the carpet curves around the bar, there is a good chance that the split might be visible.

GTautoDesign

Is the bar bronze/Agate? or is it just the lighting?

BBiAutosport

It is just the lighting. The finish is satin black.

BBiAutosport

Detailed pictures of the carpet and plastic trim using our provided templates

ShakeNBake

Guys, I love the product, but that install could have been done better.




ATX installed Cantrell bar - see what I'm talking about?

Mech33

Looks like ATX cut the carpet the same way I described below. As a result you can't see any carpet slices.

BBiAutosport

ShakeNBake,

Thank you for the input. That picture was taken right after we put the some of the interior trim back and we did some adjustment afterwards. Here are a few more pictures.

BBiAutosport

Alan C.

Thanks for the photos detailing the installation.

BBiAutosport

You are very welcome Alan!

Sven76

Not sure about the design, any other roll cage I've seen goes down to the floor of the car, this one end very high up. Is it really adding more security to the car / driver?

BBiAutosport

For improved braking performance, we upgraded the brake fluid and pads. The Brembo Racing HTC 64T High temperature brake fluid provides a very high dry boiling point and the TS20 brake pads combines an aggressive initial bite, good heat resistance all while keeping dust and noise to a minimum.





Brembo HTC 64T High Temperature Brake Fluid and TS020 Brake Pads



Front Brakes









Rear Brakes