For the 2025 track season, we went with the Goodyear Supercar 3R for our 2022 Porsche GT4 setup. Earlier this year we had struggles with this setup and only managed a 1:44.9 with our pro driver Alex due to the snappy balance after switching from Nankang CRS to the more aggressive Goodyears. After the initial test we realized a lot had to change with the chassis to better manage these tires.
We've seen other shops develop the GT4 platform with one thing in mind, selling a lot of parts. We approached the Porsche 718 with a different philosophy and aimed to maximize the chassis for what it can do and avoid any extensive modifications that would void the powertrain warranty and also make the car difficult to live with on the street. What we wanted to avoid that we did see with other setups are:
- Giant front splitters that would never clear a speed bump
- Oversized rear spoilers that would create a lot of drag and become unbalanced without said giant front splitter.
- Low hanging rear diffusers that would never clear the turn 6 to 7 dip at the Ridge
- Aftermarket headers that would require a tune to optimize and ensure there's no check engine lights thus voiding your factory engine warranty
- No trailer/garage queens, the car should be able to drive to and from the track over long distances with no issues.
- An overall very high cost with packages exceeding $50000 (e.g., $30000 big brake kits and $20000 coilover suspension)
Our goal was to solidly break into the 1:44's at The Ridge which is right in the GT3 (non-RS) territory without an exorbitant budget and with a time of 1:43.48 we managed to do just that. Our OD GT4 project is running factory shock absorbers, headers, brake calipers, sway bars, and aero. We do have a lot of alignment goodies from Tarett as featured in our suspension packages as well as Swift springs. In terms of power mods we have just a simple BMC air filter, Soul Performance resonated over axle pipe, and a JCR silenced rear muffler. All in all we are very pleased with the result but will continue to push for 2026 as the chassis inherently has a lot of tunability as is with the height/corner balance, sway bars, and alignment settings.
We found out very early on that the PDK GT4's run very hot with oil temps exceeding 140C (280F) quite easily, so we didn't want to stress the car too much with power mods. We also found that with factory aero which doesn't provide a lot of downforce but produces very little drag, we were actually able to keep up with our client's more powerful 991 GT3RS on the front straight. The complete mod list is below, theoretically building a car with the same chassis mods would cost approximately $20000 CAD which we think is a reasonable spend to achieve GT3 level performance. Fancier wheels and exhaust setups would drive the cost up at the owner's discretion but the core package is rather attainable.
- Custom OD 992 GT3 style 19x9.5 & 19x11.0 forged wheels
- 265/35-19 + 305/30-19 Goodyear Supercar 3R
- Tarett Front and rear camber plates
- Tarett Caster puck (middle setting)
- Tarett Extended bump steer tie rods
- Tarett Rear toe arms
- Tarett Monoball end and shims
- Swift Springs (8K front & 10K rear)
- DSC Sport PASM module
- BMC Air Filters
- Soul resonated over axle pipes
- JCR silenced/valved rear section
- Cargraphic valve controller
- BBI roll bar
- Verus rear diffuser plates
- Girodisc front rotors with Ferodo DS1.11 pads
- Factory drilled rear rotors with Carbotech XP10 pads