MME-JRZ-00184

These dampers are for a Porsche 550 Spyder (1953-1959).

JRZ 12 SERIES Dampers

JRZ Suspension Engineering is proud to offer the 12 series; triple adjustable motorsport damper. The JRZ 12 series is an expansion of our damping philosophy, which is to control the unsprung mass. Added is the low speed compression adjustment, allowing pitch, roll, and balance to be tuned. Damping adjustment is available over a large range with fine tuning increments. Setup is easy to find while fine tuning is possible, and characteristics are fully customizable.

• Rebound adjustment independent from compression
• Fully useable adjustment range
• Fine yet noticeable change per click
• Compression Adjustments
  • 10 clicks low speed compression
  • 19 clicks high speed compression
• 24 clicks rebound
• High volume canister
• Adjustable gas pressure
• 22 mm shaft
• Highest flow rate to piston
• Lightest construction
• Ideal for lighter applications and aluminium body dampers

Compression

Control of the unsprung mass is achieved with our blow off valve. Steering balance and weight transfer rates are tuned with the low speed adjustment. The high speed compression adjustment sets the blow off velocity of the damper, allowing for harshness to be separated from control. Blow off damping settles the car on bumps, curbs, and maximizes grip. Low speed sets the speed at which the blow off valve opens allowing for fine tuning of balance and adjusting for surface conditions.

Above is the high speed compression adjustment range of a typical JRZ 12 series. The blow off system, innovated by JRZ, is seen moving the opening point of the valve up and down. The full range is useable and each step is a fine yet noticeable increment.

Above is the low speed compression adjustment range of a typical JRZ 12 series. The low speed adjustment, innovated by JRZ, is seen by the changing angle of the force line. The low speed adjustment is usable at every high speed click.

Rebound

Sprung mass is controlled with rebound damping, delivered smoothly by the 8060 motorsport piston. The 12 series rebound system and 8060 piston provides a linear damping characteristic with smooth pressure development independent of compression forces. This allows the damper to transition between rebound and compression efficiently, maximizing grip and reducing tire wear.

Above is a graph of the rebound adjustment range of a typical JRZ 12 series. It can be seen that the steps are even, the range is large and the curve is smooth. This allows the chassis to be tuned predictably, step by step.