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# How do you calculate coil spring rate?

## How do you calculate coil spring rate?

To calculate the amount of spring rate you will need on order to meet your working loads, simply divide the load you will be applying on your spring by the distance you expect your spring to travel or compress under that load. The equivalent to that formula will be your compression spring rate as shown below.

## Does Jeep Wrangler have coil springs?

Find everything you need to lift your Jeep Wrangler, including Wrangler JK coil springs and spacers! Upgrade your springs, or simply replace your stock ones, with many different coil spring options, all in one place! Fitting directly in to place, these coil springs require no modification to install!

How do you increase coil spring rate?

One way this can be done is by changing the coil spacing, so that coils start to touch each other as you compress it. Another way common in racing is for the spring to compress and then encounter an additional spring. This increases the spring rate because now you have 2 springs acting on the force.

What does coil spring rate mean?

Spring rate refers to the amount of weight that is needed to compress a spring one inch. per inch spring – it will compress 1” when a 200 lb. load is placed onto the spring. If another 200 lbs. is put onto the spring, the spring will compress another inch.

### What is a progressive rate coil spring?

Progressive-rate coil springs are also called variable-rate coils springs, and have a spring rate that increases as the coil compresses from free length (unloaded). Not only do progressive springs give a smoother ride over small bumps, but they also make the suspension stiffer more quickly as it compresses.

### What year did jeep switch to coil springs?

The super-capable Wrangler (TJ) with its new coil suspension was introduced in 1997. In 1999 the new Grand Cherokee (WJ) was marketed as the most capable SUV ever.

Does cutting a coil spring change the spring rate?

Cutting coils does increase the spring rate. The only thing that will change will be the length of the wire used to wind the spring. The longer the wire is the lower the spring rate. As the wire get shorter, such as when cutting the coil, the spring rate increases.

Does number of coils affect spring constant?

The more coils added to a spring, the lower the spring rate will be.

## How tall are coil springs on a Jeep Wrangler?

The lift height of the springs is 7.5 inches. The coil springs are generally sold as pairs and can be mounted in the front of your vehicle. This specific alternative can fits all the models from 1997 to 2006 of Jeep TJ Wrangler as well as the models from 1984 to 2001 Jeep XJ Cherokee.

## What’s the lift rate of a rusty XJ spring?

SJ 6in XJ RR coil is 13 coils and same height and thickness as the RE ZJ4.5in XJ5.5in coil. OEM is supposedly 147 lb/in rate. Rustys 3″ coils give 3″ and have 150 lb/in rate. Rancho 3″ coils, at least the old coils give about 2 1/4″ of lift on an XJ and have a very high 235 lb/in rate.

How much lift does a coil spring give?

The coil spring works efficiently with the suspension system to absorb the shocks produced due to the vertical motions of the wheels. It can give 1.75 inches to 2 inches of lift to the Jeep models. There are options for both front and rear applications available.

What kind of spring does a jeep 934 use?

The 930 is listed as a XJ or ZJ I-6 spring and the 934 is listed as a ZJ V-8 spring but is also used on the XJ. the 934 should give about 2.5in lift. RE 5.5XJ coils are 4.5ZJ coils. Rustys 3″ coils give 3″ and have 150 lb/in rate.