Dežru Spec-RS for 82-91 Porsche 944

Dežru Spec-RS Coilovers – Porsche 944

The Dežru Spec-RS coilover system is engineered specifically for the Porsche 944 chassis. With its front-engine, rear-mounted transaxle layout and exceptionally balanced weight distribution, the 944 responds extremely well to properly developed suspension tuning.

Developed for serious street driving, canyon roads, autocross, and dedicated track use, the Spec-RS utilizes digressive piston valving to improve low-speed chassis control during braking, turn-in, and weight transfer while maintaining enough compliance to keep the chassis stable and predictable over uneven pavement and curbing.

Unlike generic “one-valving-fits-all” coilovers, the Spec-RS is developed around the 944’s suspension geometry, front and rear motion ratios, weight distribution, and unique rear suspension architecture. The result is a suspension system that feels considerably sharper and more connected without making the chassis nervous or unnecessarily harsh.

Fixed-length damper bodies paired with a 25–45 mm adjustable lowered ride height help preserve usable suspension stroke and proper geometry. This allows the 944 to maintain composure and mechanical grip during aggressive driving rather than sacrificing suspension travel simply to achieve ride height.

Key Features

• Digressive monotube dampers for improved transient response, consistent damping behavior, and precise chassis control.

• Remote reservoir configuration improves thermal stability during aggressive driving and extended track sessions.

• Fixed-length damper bodies with 25–45 mm adjustable lowered ride height to preserve usable suspension travel and geometry.

• 20-position rebound adjustment allows fine tuning for street driving, canyon use, autocross, or track conditions.

• 400 lb/in front and 600 lb/in rear spring rates, selected around the dramatically different front and rear suspension motion ratios of the 944 chassis to provide balanced wheel rates rather than simply matching spring rates front to rear.

• Rear coilover conversion with torsion bar delete allows the coil spring and damper package to provide primary rear suspension support while simplifying spring-rate and ride-height adjustment.

• Linear performance springs provide smooth, predictable load transfer throughout suspension travel.

• Pillowball upper mounts improve steering precision and alignment consistency during high-load driving.

• Hand-built and dyno-matched dampers ensure precise left-to-right consistency and repeatable performance.

Performance Character

The Spec-RS transforms the Porsche 944 into a sharper, more disciplined chassis without removing the natural balance and communication that have made the platform so respected by drivers.

The digressive damping profile delivers strong initial platform control during braking, turn-in, and rapid transitions while allowing the suspension to remain composed over mid-corner imperfections and uneven pavement.

Compared to softer street-focused setups, the Spec-RS significantly reduces excess body movement, improves steering response, and gives the driver greater confidence during high-speed transitions and sustained cornering.

The result is a 944 that feels flatter, faster reacting, and more precise while maintaining enough compliance and mechanical grip to remain enjoyable outside of the racetrack.

Why We Recommend 400 lb/in Front & 600 lb/in Rear for the Porsche 944

Spring rates on the Porsche 944 cannot be evaluated by simply comparing the numbers printed on the front and rear springs. The chassis uses very different front and rear suspension geometries, which means the spring’s location and motion ratio have a significant effect on the actual spring rate experienced at the wheel.

For this reason, the apparently rear-heavy 400 lb/in front and 600 lb/in rear combination is intentionally selected to create a much more balanced chassis than the raw spring-rate numbers suggest.

The 400 lb/in front spring provides the support necessary for aggressive braking, rapid turn-in, and high-speed transitions without making the front axle unnecessarily stiff. This allows the front tires to maintain mechanical grip over imperfect pavement while giving the driver the immediate steering response expected from a track-focused suspension.

The 600 lb/in rear spring compensates for the 944’s significantly lower rear suspension motion ratio. Because the rear coil spring has less leverage at the wheel than the front spring, a substantially higher rear spring rate is required to produce the appropriate rear wheel rate. The higher numerical rate therefore does not mean the rear of the car is dramatically stiffer than the front.

This distinction is particularly important when converting the 944 from its factory torsion-bar rear suspension to a true coilover arrangement. With the torsion bars deleted, the rear coil springs become the primary springing element and must be sized accordingly.

The 400/600 combination was selected to work together with the Spec-RS digressive valving rather than relying on excessive spring stiffness to control the chassis. This allows the dampers to provide strong low-speed platform control while the springs retain enough compliance for mechanical grip over bumps, pavement transitions, and curbing.

This setup helps the Porsche 944:

• Improve braking support and turn-in response
• Reduce body roll, pitch, and transition delay
• Maintain balanced front-to-rear chassis behavior
• Compensate for the 944’s substantially different front and rear suspension motion ratios
• Improve stability during throttle application and corner exit
• Maintain mechanical grip over uneven pavement and curbing
• Deliver track-capable response without resorting to unnecessarily harsh spring rates

Overall, the 400 lb/in front and 600 lb/in rear combination gives the Porsche 944 a significantly more focused and confidence-inspiring character while preserving the balance, predictability, and communication that make the transaxle Porsche chassis so rewarding to drive.