Triumph Spitfire Rear Suspension Upgrade: How Classic Owners Are Boosting Performance
The Triumph Spitfire, a quintessential British sports car, holds a special place in the hearts of enthusiasts worldwide. Its nimble handling and open-top experience are legendary. However, the original rear suspension, while charming in its simplicity, can leave much to be desired in terms of performance and modern driving dynamics. This article delves into the world of Triumph Spitfire rear suspension upgrades, exploring the options available and how classic owners are breathing new life into their beloved roadsters. We’ll examine the benefits, common upgrades, and what to consider when making your Spitfire handle like a dream.
Why Upgrade Your Triumph Spitfire Rear Suspension?
The stock Triumph Spitfire rear suspension, comprised of a swing axle design, is known for its tendency to “tuck” under heavy cornering, leading to unpredictable handling and potential oversteer. While this design was common for its era, it struggles to keep pace with modern driving expectations. Upgrading the rear suspension offers a multitude of benefits:
- Improved Handling: Reduced body roll, increased grip, and more predictable cornering behavior.
- Enhanced Stability: Minimizes the risk of “tuck-under” and promotes a more stable platform.
- Greater Control: Provides the driver with more confidence and control, especially during spirited driving.
- Increased Ride Comfort: Some upgrades can improve ride quality, absorbing bumps and imperfections in the road more effectively.
- Modern Performance: Allows you to enjoy the Spitfire’s classic charm with a driving experience closer to modern sports cars.
Common Triumph Spitfire Rear Suspension Upgrade Options
Several upgrade pathways can transform the Spitfire’s rear end. Here are some popular choices:
1. Coilover Conversion Kits
Coilover kits are a popular and effective upgrade, offering a significant improvement in handling and adjustability.
- Benefits:
- Adjustable ride height and damping.
- Improved spring rates for better control.
- Reduced body roll.
- Generally a bolt-on installation, making it relatively straightforward.
- Significant improvement in overall handling characteristics.
- Considerations:
- Can be more expensive than some other options.
- May require some modifications depending on the kit.
2. Trailing Arm Conversions
This type of conversion replaces the swing axle with a more modern trailing arm setup. This eliminates the inherent flaws of the swing axle design.
- Benefits:
- Dramatic improvement in handling and stability.
- Significantly reduces “tuck-under” issues.
- Enhanced control during cornering.
- Often includes adjustable components for fine-tuning.
- Considerations:
- More complex installation, often requiring welding and fabrication.
- Can be a more costly upgrade.
3. Upgraded Springs and Shocks
A more budget-friendly option involves replacing the original springs and shocks with performance-oriented components.
- Benefits:
- Improved ride quality and handling compared to stock.
- Relatively easy installation.
- Cost-effective.
- Considerations:
- May not offer as significant a performance improvement as coilover or trailing arm conversions.
- May require other components to be upgraded to accommodate the new shocks/springs.
4. Anti-Roll Bars (Sway Bars)
Adding a rear anti-roll bar can help reduce body roll and improve handling.
- Benefits:
- Reduces body roll during cornering.
- Improves overall stability.
- Relatively easy to install.
- Considerations:
- May not be as effective as other upgrades on its own.
- Can affect ride comfort depending on stiffness.
Important Considerations Before Upgrading
Before embarking on your Triumph Spitfire rear suspension upgrade, keep these factors in mind:
- Budget: Determine how much you’re willing to spend. Prices range from a few hundred dollars for springs and shocks to several thousand for a complete trailing arm conversion.
- Driving Style: Consider how you intend to use your Spitfire. Track use will necessitate a more comprehensive upgrade than casual weekend drives.
- Mechanical Skill: Evaluate your own abilities or budget for professional installation. Some upgrades require significant mechanical expertise.
- Component Compatibility: Ensure that all new components are compatible with your Spitfire’s existing setup.
- Research & Reviews: Read reviews and consult with other Triumph Spitfire owners to gather information on specific kits and their performance.
Conclusion: Rejuvenating Your Triumph Spitfire’s Rear End
Upgrading the rear suspension of your Triumph Spitfire is a rewarding endeavor that can significantly enhance its performance, handling, and overall driving experience. By carefully considering your budget, driving style, and the various upgrade options available, you can transform your classic roadster into a more capable and enjoyable machine. From coilover conversions to upgraded springs and shocks, there’s a solution to fit every budget and ambition. Embrace the possibilities and prepare to rediscover the joy of driving your Triumph Spitfire!
Frequently Asked Questions (FAQs)
1. What is “tuck-under” and why is it a problem with the Triumph Spitfire’s rear suspension?
“Tuck-under” refers to the tendency of the rear wheels to steer inward during cornering, especially under heavy braking or acceleration. This can lead to unpredictable handling and oversteer, making the car difficult to control. The Spitfire’s swing axle design is particularly susceptible to this phenomenon.
2. Are coilover conversions difficult to install?
Installation difficulty varies depending on the specific kit. Many coilover kits are designed as bolt-on replacements, making them relatively straightforward for mechanically inclined owners. However, some kits may require minor modifications. Always follow the manufacturer’s instructions and consult with a professional if you’re unsure.
3. Will upgrading the rear suspension affect the car’s ride comfort?
This depends on the specific upgrade. Upgrading to stiffer springs and shocks can sometimes make the ride firmer. However, coilover kits offer the ability to adjust ride height and damping, allowing you to fine-tune the ride comfort to your preferences.
4. Where can I find parts and kits for Triumph Spitfire rear suspension upgrades?
Specialty parts suppliers and classic car restoration shops are excellent sources for Triumph Spitfire suspension upgrades. Online retailers like Moss Motors, Rimmer Bros, and various eBay sellers also offer a wide selection of components. Research and compare prices and reviews before making a purchase.
5. Is it necessary to upgrade the front suspension when upgrading the rear?
While you can upgrade the rear suspension independently, upgrading the front suspension simultaneously is often recommended for optimal balance and handling. This ensures a more cohesive and predictable driving experience. Coordinated upgrades front and rear will often maximize overall performance.
