In our last story about Suspension for our upcoming S13 Project car, we went over what we feel is the ultimate front suspension/angle kit for the S Chassis from GKTech. Now let’s go over the rear suspension offerings from GKTech which we also feel that it is perhaps the most well-thought-out rear suspension for the Nissan S Chassis, the Nissan Z32 Z car, and the R32 GT-R.
The multilink rear suspension design of the S Chassis, the Z32, and the R32 was Nissan’s first venture into the world of multilink designs and it was designed at a time when multilinks were just coming on the market from various manufacturers. It was an era when fast-ramping anti-squat geometries and active toe steering were thought to be the solution for many vehicle dynamic issues and the Nissan suspension of this era had all of those bells and whistles. Now that tire and damper technology and our knowledge of vehicle dynamics have increased greatly, all the extremes of the Nissan suspension geometry have been found to hamper high-performance driving. When we were competing with the S Chassis, we completely re-engineered the suspension geometry with all bespoke parts. This sort of thing was well beyond the reach of the average enthusiast but now GKTech makes it available to anyone.
GKTech’s rear knuckles are perhaps the best though out knuckles on the market for these Nissan chassis. They incorporate every single aspect of what we used to in our Pro Drift car. We used to have to fabricate these parts but now you can simply buy a better product than what we came up with off the shelf!
As a starting point, the GKTech knuckles have provisions for 40mm of lowering without messing up the geometry. This keeps your roll center in the proper place. The stock S13 rear suspension has the rear roll center migrate greatly with suspension movement. We have found this, and an excessively low roll center when the car is lowered makes a gripped-up car twitchy and hard to control in both drift and grip driving.