How Far is Too Far? The BBI Cayman GT4 Street Cup

Make a Porsche too soft, and it doesn’t work on track. Make a Porsche too hard, and it doesn’t work on the street. Trying to toe that line is a major challenge in any suspension build, and one I will struggle with during Project 944 GTS. While the Cayman GT4 is pretty hardcore for a production Porsche, it is still daily drivable. When Jason Overell brought his GT4 to BBI for their Street Cup suspension, he did it with the intent of taking the GT4 to the next level. Between the higher-rate springs, upgraded dampers, and the removal of rubber bushings in the suspension, the GT4 became a much harder-edged machine.

While these changes made the GT4 harder to use day to day, they sharpened it up considerably for road rallies and track use. In the opinion of professional racing driver Miles Maroney, who has extensive experience racing Porsches in IMSA, this setup is spot on. BBI’s setup is based on their GT3 Cup front suspension, with bespoke pieces at the rear of the Porsche which are Cayman-specific. According to Miles, the setup gives the GT4 a much more confident feel, while leaving enough on the table for it to still dance around a bit.

Let’s talk about this a bit- if your Porsche is equipped with non-stock suspension, please tell us about it in the comments. What was your intent with your setup? Does it work well on street and track, or is it heavily biased towards one or the other? What single suspension modification did you find most transformative on your Porsche?