ZSM S30z Coilover - Custom Tuned for Datsun 240z/260z/280z

 Our S30z Coilover

We are proud to finally release our S30z coilover. This is something we have been developing on our shop S30z over the past 2 years.

Our target is to provide a product that is specifically designed for the S30z chassis. Our dampening has the breadth to be daily driven over the roughest streets, to canyon driving, and full track use.

Partnership with Swift Springs

We have worked in tandem with Swiftsprings to calculate and analyze ride frequencies for the S30z chassis. This has allowed us to have total control over our dampening. We can tune for exactly what we want.

Extensive R&D Process

We have gone through a lot of R&D and thousands of street, canyon, and track miles, constantly critiquing and adjusting settings.

Some of the things we have tested for are:

• Valving
• Piston design
• Shock oil viscosity
• Spring rates
• Shaft length
  

Technical Specifications

• Monotube damper with proprietary piston design and valving
• 32 clicks of rebound adjustment (1-way)
• Spring rates: 6kg front / 5kg rear
• JDM standard thread pitch 
• Standard JDM 60mm spring perch
• Main and helper springs included
• Thrust sheets as standard
• Camber plates included
• Lower perch to be welded on OEM strut

The Science Behind the Comfort

Our spring rates (6kg/5kg) are stiffer than other options on the market like T3 and BCs, but our setting actually feels softer. We achieved this because we looked at the S30 chassis frequency. This allows us to tune out unwanted harmonics and create a balanced system.

With our coilovers you will absolutely be able to daily drive on the roughest roads.

Performance When You Need It

Don't think our valving is just for comfort however - with 32 clicks of adjustment, we can quickly increase performance and be ready to rip canyon roads and be competitive on track.

Even in our stiffer settings, the ride quality is still very nice and can still be driven on the street. This is because of the frequency tuning we did and the balance we have between spring rate and dampening.

User-Friendly Adjustability

Our valving is tuned to be in a usable range. Since we have data on everything, we will be providing baseline clicker settings for street and track.

We chose a 1-way adjustment because we want enthusiasts to not be afraid of adjusting their dampers to their liking and driving style. Our adjustments are distinct enough to feel and adjust valving at a consistent rate. Within a few clicks, we can change the car's balance from understeer to oversteer for driver preference.

What's Included

• Monotube coilover dampers (set of 4)
• Camber plates
• Swift Springs main and helper springs
• Swift Springs thrust sheets
• Lower perch for OEM strut welding
• Baseline setup guide for street and track

Optional Upgrade: Thrust bearings with Swift Spring protective bag - $160