Specification
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| Dimensions | N/A |
| Photo # | 1027 |
Select a vehicle to find exact fit parts
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.
Learn more about how Landrum Springs are designed and manufactured here.
Related products
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Elite Series Dirt Modified springs and Stock Car springs give you the winning edge. Elite Series Coil Springs are designed to be the best of the best and are Landrum’s highest performance springs. Whether used on oval dirt cars or oval pavement cars, superior Landrum engineering and performance leads the way.
Maximum Spring Travel and Lightness
- Only the best grade of high tensile chrome silicon wire is used for manufacture of our Dirt Modified springs, and Stock Car Springs.
- Designed using the latest coil spring design software and state-of-the-art coil spring engineering methods.
- These are Landrum’s most consistent and durable racing springs.
Intensive Quality Control Processes
- Tensile and compressive stiffness of the wire is checked before the coiling process.
- An intensive heat and press process is used that is unique to the Elite Series.
- Each spring is individually tested for quality and consistent performance.
Front and Rear Spring Sizes and Rates – Dirt Modified Springs, Pavement Modified Springs, Dirt Stock Car Springs, and Pavement Stock Car Springs
Landrum Performance has created the Elite Series line of racing coil springs specifically for IMCA and UMP series cars.
Front Springs
- 5” OD front springs are available in 9.5” length with rates ranging from 300 lb./in to 600 lb./in
- 5” OD front springs are available in 10.5” length with rates ranging from 300 lb./in to 450 lb./in
- 5” OD front springs are available in 9.5” length with rates ranging from 500 lb./in to 1,000 lb./in
Rear Springs
- 5” OD rear springs are available in 11” length with rates ranging from 125 lb./in to 250 lb./in
- 5” OD rear springs are available in 13” length with rates ranging from 150 lb./in to 275 lb./in
- 5” OD rear springs are available in 16” length with rates ranging from 50 lb./in to 250 lb./in
- 5” OD rear springs are available in 16” length with rates ranging from 50 lb./in to 250 lb./in
- 5” OD rear springs are available in 20” length with rates ranging from 50 lb./in to 75 lb./in
More information about the manufacturing of Landrum Dirt Modified Springs as well as our other coil springs 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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Landrum Performance Springs, stock appearing are intended for the classes that require stock appearing springs and don’t require use of spacers or weight jacks. The springs are painted black for a stock appearance. Landrum rear coil springs are closed and ground on both ends. They are made from the highest grade chrome silicon wire and cold wound–not hot wound–and properly heat-treated and stress-relieved.
The U-Series is designed for the racer who has to utilize only one pigtail hookup.
Tip: Ford Mustang @ GM metric chassis Overall height is 11″ outside diameter 5.5″ Spring is painted black for stock appearance. Tagged with proper rate.
**We also have a 9″, 5.5″ OD**
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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 500-1400 lbs. per inch
Additional Landrum Performance Springs technical information can be found here.