Specification
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Progressive Coil Springs
Landrum Progressive Coil Springs for circle track cars give you rugged and dependable performance that’s trusted by racers nationwide.
Progressive Coil Springs for Circle Track Cars
In the 1960’s, Landrum Springs owner Robert Landrum, who was also a dirt oval racer, used his racing experience to engineer high performance racing springs that quickly became popular with local racers. As oval track racers nationwide discovered the performance advantage of Landrum Springs, the company became the go-to source for high performance racing springs.
Today, we continue to work closely with racers to deliver the best performing progressive rate coil springs. We ensure Landrum Performance Springs Progressive Coil Springs deliver the performance, durability and long-term consistency racers need to take the best set, every time.
What’s the Difference Between Progressive Coil Springs and Constant Rate Coil Springs?
While constant rate coil springs are wound to have equal spacing between the coils, coil spacing of progressive springs varies with narrow spacing at one end of the spring, and wider spacing at the other.
Constant rate coil springs compress at a linear rate, meaning rate of force needed to compress the spring a certain amount remains the same. For example, a spring with a 300 pound-per-inch linear rate (also known as the rate of deflection) will compress one inch when 300 lbs. of compression force are applied. The spring will compress another inch if an additional 300 lbs. of force is added, and so on.
With Progressive rate coil springs, the rate of deflection increases as the as the spring is compressed. The spring has a softer rate at the beginning of its range of travel. So, it can easily cushion small compression forces and shock loads. As compression forces increase the spring progresses to a higher rate to handle larger compression forces.
What’s the Benefit of Progressive Springs?
When it comes to circle track racing, the initial lower spring rate allows the suspension to smoothly take a set as the car enters a corner, and the higher spring rate comes into play as spring compression load increases when weight transfers as the car progresses through the corner.
What Metal are Landrum Springs Made With?
Landrum produces coil springs with the highest quality US made High Tensile Chrome Silicon Alloy Steel. This results in springs with superior strength, reliability, and the ability to retain their original high-performance qualities after repeated use.
Landrum Progressive Coil Spring Sizes
Diameter: 5” OD
Length: 13”
Rates:
- 125-300 lb./in.
- 150-350 lb./in.
- 175-400 lb./in.
- 200-450 lb./in.
Watch this video to learn how Progressive Coil Springs work.
Related products
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What Makes Landrum Elite Series Coil Springs Ideal for IMCA and UMP Racing?
Landrum’s Elite Series Coil Springs are Landrum’s best performing linear rate conventional coil springs. These durable racing springs don’t take a set and maintain free height and specified rate. Each spring is tested to verify it meets a strict ±2% rate specification, and a dyno sheet is included to document its performance.
Engineered as Landrum’s ultimate linear rate conventional coil spring, Elite Series Coil Springs are built for the rigors of IMCA and UMP racing and trusted by racers seeking the best suspension setup to stay ahead of the competition. Landrum Elite springs deliver unmatched precision, durability, and performance on every lap.
How do Landrum Racing Springs Improve Performance?
- Precision Engineering and Manufacturing – Produced using cutting-edge engineering and manufacturing technology to ensure durability and the most consistent rates in the industry.
- Premium Materials – High Tensile Chrome Silicon Alloy Steel is used for springs with superior strength, reliability, and the ability to provide consistent performance without taking a set after being fully compressed repeatedly.
- Proven Performance – Every spring includes a dyno sheet showing it meets a strict ±2% rate specification. No other racing spring manufacturer does this.
- Track-Tested – Trusted by racers nationwide for durable and consistent performance.
- The Springs You Need – A wide range of sizes and rates help to fine-tune suspension setup.
- Made in the USA – Elite Series Coil Springs are manufactured at Landrum’s Mentone, Indiana facility.
Which Coil Spring Size Do You Need?
Landrum Elite Series Coil Springs come in a variety of sizes and rates to match your racing needs, whether for IMCA modifieds, UMP late models, stock cars, or other race cars.
Front Coil Springs (5″ and 5.5″ OD)
- 5″ OD x 9.5″ Length – Rates: 300 lb./in to 650 lb./in
- 5″ OD x 10.5″ Length – Rates: 300 lb./in to 450 lb./in
- 5.5″ OD x 9.5″ Length – Rates: 500 lb./in to 1100 lb./in
Rear Coil Springs (5″ OD)
- 5″ OD x 11″ Length – Rates: 125 lb./in to 350 lb./in
- 5″ OD x 12″ Length – Rates: 175 lb./in to 300 lb./in
- 5″ OD x 13″ Length – Rates: 80 lb./in to 275 lb./in
- 5″ OD x 16″ Length – Rates: 50 lb./in to 250 lb./in
- 5″ OD x 20″ Length – Rates: 50 lb./in to 75 lb./in
How Can Landrum Springs Help You Win?
Consistency and precision are the keys to victory. Landrum’s Elite Series Coil Springs give you the performance edge needed to dominate the track. Whether you are looking for springs for dirt modified cars, stock cars, dirt late models, or other types of IMCA and UMP race cars, we have the consistent performance racing springs you need to optimize your suspension set up for maximum control and traction.
Whether you need springs for dirt modifieds, stock cars, dirt late models, or other IMCA and UMP race cars, we offer consistent-performance racing springs designed to optimize your suspension for maximum control and traction.
Looking to fine-tune your suspension? Elite Series Coil Springs deliver the performance you need to gain a competitive edge—Landrum has you covered!
Learn more about the manufacture of Landrum coil springs here.
Want to know how stacking springs affects spring rate? Check out the video:
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Landrum Performance Stock Appearing Double Pig Tail Rear Springs are made to resemble black painted stock double pig tail springs. Offered in 7″ OD x 14″ with a broad range of rates that make it easy to find the spring you need for the best handling, traction, and overall performance.
Stock Appearing Double Pig Tail Rear Springs are developed for circle track and drag racing classes that require stock appearing springs and don’t require use of spacers or weight jacks.
Landrum Performance Springs are for racers who demand the best spring performance, accuracy, durability, and consistency.
Made with Landrum Quality
- Stock Appearing Double Pig Tail Rear Springs are made with the best US made High Tensile Chrome Silicon Alloy Steel Wire for strength and reliability.
- Cold wound for strength, hardness, and close tolerance.
- Properly heat-treated and stress relieved.
- Our spring rate tolerances are tested to consistently be within 2% of specification. This ensures you get the spring rate you are expecting. We prove it with a dyno sheet provided with each spring showing the performance of the spring as it is compressed.
Stock Appearing Double Pig Tail Rear Springs – Sizes
- Designed for chassis that use double pigtail springs.
- 7” OD
- 14” Length
- Available Rates: 175, 200, 225, 250, 275, and 300 lbs. per inch
- Tip: Full size GM & Ford applications have an overall spring height of 14″ with a 7″ OD.
Additional Landrum Performance Springs technical information can be found here.
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Landrum Street Stock/Stock Appearing Front Coil Springs are engineered for racing classes that require stock appearing front springs and don’t require use of spacers or weight jacks.
Street Stock/Stock Appearing Front Coil Springs Performance
- Listening to racers, Landrum engineers springs that deliver the performance they need.
- Our lightweight, durable, precision racing springs are made to the tightest tolerances in the industry. They’re guaranteed to hold their tolerance to 2% and we prove it with a dyno sheet included with each spring.
- Landrum Performance Springs deliver and maintain reliable and consistent performance for the high demands of stock car racing.
Precision Spring Manufacturing
- The highest grade of US made High Tensile Chrome Silicon wire is used for manufacture. This wire will maintain accurate spring rate and free length.
- Our springs are cold-wound, not hot-wound and then are properly heat-treated and stress-relieved.
Street Stock/Stock Appearing Front Coil Springs Sizes
Street Stock and Stock Appearing Front Coil Springs are available in a choice of diameters, free lengths, and spring rates to fit your application.
- 5” and 5.5” Outer Diameters
- 11” and 12” Free Lengths
- Rates of 100-1400 lbs. per inch
Additional Landrum Performance Springs technical information can be found here.
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Landrum Performance Front Drag Racing Coil Springs are designed to deliver the performance, reliability, and consistency you need to win. Landrum front drag race springs are taller than OEM springs and use softer rates to give your car the correct ride height while providing more stored energy for instant weight transfer during launch. This helps to give you increased torque control, reduced wheel hop, and faster 60ft and 1/4-mile ET’s.
Landrum drag race springs are available for the front suspension of GM vehicles and are offered in configurations to fit OEM A-Arms and Aftermarket A-Arms with no modifications required. Springs with a 5” outer diameter and 18” length are available for 1964-1972 GM vehicles, and springs with a 5.5” outer diameter and 18” length are offered for 1973 and newer models.
Front Drag Racing Coil Spring Rates
Our Front Drag Racing Coil Springs are available in a range of rates including:
- 150 lbs./in.
- 165 lbs./in.
- 180 lbs./in.
- 200 lbs./in.
- 225 lbs./in.
- 250 lbs./in.
Technical Information
All front springs are closed and ground on one end to provide proper contact with the frame. The opposite end is either open to properly fit into the lower control arm of OEM A-Arms or closed for Aftermarket A-Arms.
Landrum Performance Front Drag Racing Coil Springs are light weight, high travel and made with the highest-grade High Tinsel Chrome Silicon Steel wire.
The drag race springs are cold wound, not hot wound. Each is properly heat treated and stress relieved to ensure the sides of the spring remain parallel during installation.
All Landrum Front Drag Racing Coil Springs use standardized testing procedures to ensure the best quality and performance.
Our springs are powder coated and not plated which avoids hydrogen embrittlement, a condition that can be caused by electroplating and can weaken metal.
Each spring is manufactured with the highest tolerance in mind and is designed with the correct pitch and height ratio to insure a consistent rate throughout the entire cycle.
More technical and application information can be found here.
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Spring Compressor for Long Length Coil Springs
This Spring Compressor makes it easy to install our 18” Front Drag Racing Coil Springs. Standard spring compressors just aren’t long enough to properly compress 18” springs, but our spring compressor is. The spring compressor is inserted through the top shock absorber opening and a long length threaded rod allows the compressor fingers to reach down to the bottom of the spring. A position adjustable bearing located toward the top of the rod seats on the top of the shock opening so the threaded rod turns freely when the spring compressor is tensioned or loosened.
Retail Price: $169.00
To purchase a spring compressor:
- Add a spring compressor to your Front Drag Racing Coil Springs order.
- Or to purchase a spring compressor separately click here.
Download Spring Compressor Instructions:
Download “Spring-Compressor-Instructions-2.0.pdf” Spring-Compressor-Instructions-2.0.pdf – Downloaded 12052 times – 199.22 KB_______________________
