10/09/2026
OK, so this is the start of a back to back long term study between semi active and passive suspension with more development in the mix 🪄
A few thoughts on the Tractive + DSC set-up post .
We know this GT4 well on standard PASM, on road and track. For the ‘Ring, we fitted with the GT4 Tractive map, using springs around 50% stiffer front / 40% rear.
Ride height, geo and aero remained unchanged, with the OEM MS toe arms retained — so we had a very familiar starting point.
On the road: the extra spring introduces a little ‘bobble’. Not necessarily our choice for a predominantly road car, although there’s scope to explore what can be improved further with DSC mapping. The verdict is still out 👀
On track: it’s a YES. More support, more control, less dive on braking and still predictable. No twiddly k***s like on a passive set up, just programme and go.
The limiting factor? Tyre. And honestly? Talent 😂
Rain was forecast, so we went with PS4S. In the dry, one good lap saw them at over 50°C and moving around more than we’d like. From there, we were driving to the tyre rather than finding the limit of the chassis.
BUT that isn’t necessarily a bad thing. Driving to the tyre has its benefits when you’re still learning the ‘Ring — and we very much are. A predictable car moving around isn’t the worst way to build confidence, consistent lap times and learn the circuit.
So, track: yes. Road: jury’s still out.
Next stop: Donington Park on Cup 2s — a circuit we know well and have driven many times with standard PASM and Cup 2s.
Let’s see what we find 👀
