SpeedFreaksUSA

Hello fellow RL Folks!

We are excited to be a site sponsor , my team members have introduced us earlier in the month- we are now stoked to be announcing a new revision to some GD rotors that have been favorites among Porsche track enthusiasts.

Girodisc is releasing a brand new rotor casting that will be used on most applications with an outside diameter between 345mm and 355mm, in regards to Porsche some of the applications where this rotor would be used (this list will grow, we will help coordinate and update the list in the following post for members):

- A1-032 – Porsche 996/997 350mm Front
- A2-032 – Porsche 996/997 350mm Rear
- A1-122 – Porsche 991 C2S Front
- 355x32 Brembo/Stoptech Replacement Rings
- 332x32 Brembo/Stoptech Replacement Rings

(The following is taken directly from their release - We can answer technical questions that may arise and require additional information)

Braking Performance: The forty-eight directionally curved vanes act as a centrifugal air pump and actively move cooling air through the rotor as it rotates, helping to shed heat quick and reduce brake pad fading. The discs are also slotted, allowing a maximized contact at the interface between pad and disc as the edges of the slots continuously clean and refresh the pad surface.

High Quality Materials: The Girodisc rotors use only the highest quality materials and components. The rotors are high carbon content iron for long wear and stable thermal performance. We have developed alloy combinations that are consistently outperforming anything we’ve had in the past. This is proven on both the brake dyno and the race track. We have worked closely with American foundries and testing facilities to help us design our castings and tooling to make the best possible product. This is a commitment to our customer and our country’s economy. All our iron is poured in the US.

The center hat section is aircraft grade 6061 billet aluminum with a charcoal grey color Military spec type II anodized finish. We use only American made aluminum from Kaiser, Alcoa and SAPA. The disc hardware consists of cadmium plated high strength alloy steel drive bushings which take the load from braking actions while maintaining the float between the hat and disc. Girodisc manufactures all these components in-house to our own specifications. Disc machining, hat machining and pin machining all happens at our facility in Bellingham, WA.

Please feel free to PM us or post up any questions.

RL members get a member only price (please PM us for pricing) on GiroDisc, Performance Friction, Carbotech, Cobalt Friction, Endless (particulaly for the PCCB Cars), StopTech, and Motul (this list can be adjusted based on RL member requests).

SpeedFreaksUSA

(Reserved for application updates and technical notes as requested)

rubber_ducky

How are these different than the unrevised versions? From what I remember, they had 40something vanes, were slotted and had aluminum hats as well.

SpeedFreaksUSA

In regards to the differences between the old and new 345mm to 355mm casting, the major difference is in the metallurgy. The proprietary mixture has several new alloying elements to prevent premature crack propagation in racing conditions from extreme thermal cycling. Tooling for the casting and process by which they are poured to produce a more consistent higher quality casting were revamped (I believe via a source change to a local US foundry - will need to confirm).