The Acura RSX Type S remains a benchmark for front-wheel-drive performance, blending a high-revving K20 engine with a lightweight chassis. While the engine is often the focus of modifications, the suspension is the critical component that transforms power into speed. A well-sorted suspension system minimizes weight transfer, eliminates wheel hop during hard acceleration, and provides the stability needed for high-speed cornering. This guide examines the specific upgrades that unlock the full potential of the DC5 platform, focusing on how each component improves both acceleration and cornering performance.

The Dynamics of Front-Wheel-Drive Performance

Understanding the unique challenges of the FWD layout is essential before selecting components. During hard acceleration, weight transfers to the rear of the vehicle. This unloads the front tires, which are responsible for both steering and driving the car forward. The result is wheel spin, torque steer, and a loss of forward momentum. During cornering, the same weight transfer generates body roll, causing the suspension to adopt unfavorable camber angles and reducing the tire's contact patch.

Upgrading the suspension system directly addresses these issues. Stiffer damping and higher spring rates control weight transfer, keeping the front tires loaded under acceleration. Upgraded anti-roll bars shift lateral load transfer to the rear axle, promoting rotation and reducing the understeer that plagues many FWD platforms. A properly engineered suspension setup allows the RSX Type S to put its power to the ground effectively and carve through corners with precision.

Key Benefits of a Performance Suspension System

Investing in suspension upgrades delivers measurable improvements that go beyond simple aesthetics. The following benefits directly translate to faster lap times and a more engaging driving experience.

  • Reduced Body Roll: Higher spring rates and thicker sway bars keep the car flatter in corners. This maintains optimal camber angles, maximizing the contact patch and lateral grip.
  • Improved Weight Transfer Control: Performance dampers with proper valving resist rapid weight shifts. This prevents excessive rear squat under acceleration and nose dive under braking, keeping the car balanced and stable.
  • Elimination of Wheel Hop: Wheel hop is a common issue on the RSX Type S during aggressive launches. Replacing soft rubber compliance bushings with polyurethane or aluminum inserts locks the suspension geometry in place, allowing for clean, repeatable launches.
  • Enhanced Steering Response: Stiffer bushings, spherical bearings, and chassis bracing remove deflection from the suspension system. Driver inputs are translated instantly to the tires, sharpening turn-in response and feedback.
  • Increased Traction: By managing weight transfer and eliminating deflection, upgraded suspension components keep the tires planted on the pavement. This improves both forward traction out of corners and lateral traction mid-corner.

Essential Suspension Upgrades for the DC5 RSX Type S

Selecting the right components is critical for building a cohesive system. The following upgrades represent the most effective ways to improve acceleration and cornering performance on the RSX Type S.

1. Coilover Systems: The Foundation of Handling

A dedicated coilover system is the single most impactful suspension upgrade. It replaces the factory struts, springs, and upper mounts with a unified, adjustable assembly. For the RSX Type S, true rear coilover configurations are available, which eliminate the heavy, restrictive divorced spring-and-strut design found on the factory car. True coilovers reduce unsprung weight and allow for more shock travel.

Spring Rates and Damping: Selecting the correct spring rate is essential. For a daily-driven street car, spring rates between 7kg/mm front and 8kg/mm rear provide a compliant ride while significantly reducing body roll. For aggressive street use and track days, rates between 12kg/mm and 14kg/mm are common. High-quality dampers with adjustable rebound and compression allow the driver to fine-tune the car for specific conditions. A common mistake is to set the dampers too stiff, which causes the tires to skip over bumps and reduces overall grip.

Recommended Coilovers:

  • BC Racing BR Series: A popular entry-to-mid-level choice offering ride height and 30-click damping adjustability. The BR series provides excellent value and reliable performance.
  • KW Variant 3: A high-end option featuring independent compression and rebound adjustment. The KW V3 uses stainless steel technology for durability and offers superior low-speed damping control for both acceleration and cornering stability.
  • Tein Flex Z: A durable, corrosion-resistant option with a zinc-plated shock body and pillow-ball upper mounts. The Flex Z line offers excellent reliability for daily-driven performance cars.

2. Sway Bars: Controlling Lateral Load Transfer

Sway bars, or anti-roll bars, are torsion springs that connect the left and right sides of the suspension. They resist body roll during cornering and directly influence the car's balance. Increasing the stiffness of the rear sway bar is one of the most effective ways to reduce understeer on the RSX Type S.

The factory rear sway bar on the RSX Type S is relatively soft. Upgrading to a thicker bar, such as a 24mm unit from Progress or an adjustable bar from Whiteline, shifts the balance of the car toward oversteer. This allows the driver to rotate the car with throttle inputs on corner exit, making the car feel more agile and responsive.

Upgrading the sway bar end links is equally important. Factory end links use rubber bushings that deflect under load. Adjustable aftermarket end links prevent preloading of the bar and provide a solid, direct connection to the suspension.

3. Chassis Bracing: Stiffening the Foundation

The RSX Type S chassis is rigid, but further triangulation improves suspension performance. When a chassis flexes, the suspension geometry changes unpredictably, reducing grip and driver feedback. Chassis braces tie critical load points together, locking the geometry in place.

  • Front Strut Tower Bar: Connects the top of the front shock towers. This reduces chassis flex during cornering, allowing the front suspension to maintain consistent camber and toe angles. A bar like the DC Sports or Skunk2 unit provides a noticeable improvement in steering response.
  • Rear Strut Tower Bar: Stiffens the rear of the chassis, improving stability during corner exit and over uneven pavement.
  • Lower Tie Bars and H-Braces: Tie the lower control arm mounting points together. This reduces flex in the subframe during hard cornering and acceleration.

4. Bushings and Alignment Components: Locking in the Geometry

Factory rubber bushings are designed for comfort, not performance. Under load, rubber bushings deflect, allowing the suspension arms to move in unintended ways. This deflection causes vague steering, unpredictable handling, and wheel hop. Replacing these components locks the suspension geometry in place.

Polyurethane Bushings: An Energy Suspension master bushing kit replaces all the major rubber bushings in the front and rear suspension with stiff polyurethane. This is a comprehensive upgrade that sharpens the car's response dramatically.

Compliance Bushing Inserts: The front lower control arm compliance bushings are a primary source of wheel hop. Replacing them with a stiffer polyurethane unit or an aluminum insert eliminates the deflection that causes the wheel to bounce under acceleration. This is a critical upgrade for improving acceleration.

Adjustable Camber Arms and Toe Links: Lowering the RSX Type S introduces significant negative camber in the rear, which causes excessive inner tire wear and reduces straight-line stability. Adjustable rear camber arms allow the driver to restore the camber to a performance-oriented setting, typically between -1.5 and -2.5 degrees. Adjustable toe links are necessary to set the rear toe correctly, preventing the car from squirming under heavy braking and acceleration.

No suspension upgrade can compensate for poor tires. The suspension is the mechanism that controls the tire's contact patch, but the tire itself generates the grip. High-performance summer tires, such as the Bridgestone Potenza RE-71RS or Michelin Pilot Sport Cup 2, provide the compound and construction necessary to transfer the forces generated by a stiff suspension setup. A 200tw tire paired with a well-tuned suspension will outperform a cheap all-season tire on any track.

Building a Cohesive System: Street Versus Track

The best suspension setup is one that aligns with the driver's goals. A setup optimized for daily driving will differ significantly from a dedicated track car.

The Daily Driver and Canyon Carver

  • Coilovers: BC Racing BR or Tein Flex Z with moderate spring rates (8kg/mm front, 10kg/mm rear).
  • Sway Bars: Progress 24mm rear sway bar with adjustable end links.
  • Bushings: Energy Suspension master bushing kit for consistent response without excessive harshness.
  • Alignment: -2.0 degrees front camber, -1.5 degrees rear camber, zero toe front, 1/8" total toe-in rear.

The Autocross and Time Attack Weapon

  • Coilovers: KW Variant 3 or MCS with aggressive spring rates (14kg/mm front, 16kg/mm rear) and custom valving.
  • Sway Bars: Whiteline adjustable bars front and rear, tuned to balance the car for specific tracks.
  • Bushings: Hardrace or Skunk2 spherical bearings for zero deflection.
  • Bracing: Full chassis brace package including front, rear, and lower braces.
  • Alignment: -3.5 degrees front camber, -2.5 degrees rear camber, zero toe front, zero toe rear for maximum rotation.

Installation and Setup: Professional Corner Balancing

Installing high-quality components is only half the process. Proper setup is essential to realize the full potential of the upgrades. After installing coilovers, the car must be corner-weighted. Corner balancing adjusts the ride height at each corner to ensure the car's weight is distributed evenly, optimizing grip and predictability. A professional alignment performed after the car has settled on the new springs will lock in the geometry settings.

Drivers should also account for the settling period. After a new suspension system is installed, the springs will settle slightly over the first few hundred miles. The ride height and alignment should be rechecked after this settling period to ensure accuracy.

Conclusion: Unlocking the True RSX Type S Experience

The Acura RSX Type S is a chassis that rewards an integrated approach to modifications. By focusing on the suspension system as a whole rather than individual parts, drivers can create a car that accelerates harder, corners faster, and communicates more clearly with the driver. Eliminating wheel hop through upgraded bushings, controlling body roll with coilovers and sway bars, and locking in the geometry with adjustable arms transforms the RSX Type S from a capable sport coupe into a formidable track weapon. These upgrades represent the most effective path to improving both acceleration and cornering performance on one of the best front-wheel-drive platforms ever built.