You can purchase an expensive spring calculator, or you can roll your own, but the easiest way to check your race springs is here...
Use my calculator to determine the base-line Spring Rate for all the springs you have in inventory.
Spring Rate: The amount of force it takes to compress the spring 1-inch and is expressed in load per inch.
The lower the rate, the softer the spring.
If the front of your racecar is diving on turn entry you can replace the sprng with a heavier load, or increase the shock compression rate.
amount of weight the spring is
designed to carry at a certain height. This is also called the
Design Load or Load Rate.
Load Rate should not be confused with Spring Rate.
Spring Deflection and Load Rate:
Unsprung Weight is the weight of the tires, wheels, knuckles, hubs, axles, and half the weight of the springs, shocks, control arms, and/or links.
Sprung Weight is the weight of the body, chassis, drivetrain, tools, parts and the other half of the total weight of the springs, shocks, control arms and/or links.
Wheel Rate is the spring rate actually measured at the wheel (or tire). The wheel rate is usually lower than the true spring rate due to factors such as spring position and control arm or axle leverage that can effectively lessen the spring rate at the wheel versus the actual spring rate at the spring. If you move the spring closer to the tire (and the spring travels parallel to the wheel), the wheel rate and spring rate will become almost the same.
Variable Rate Springs
have a soft initial spring rate and to absorb
the subtle irregularities of the road/trail progressing to a firmer rate
to handle large bumps.
are the number of coils that do not touch the spring perch (grey area).
Increase Effect On Rate Chart:
Required Rate = (Force x Travel)/2
Calculating Spring Criteria:
this calculator to determine your springs based upon dimensions only.
Remember; tag your springs.
The spring material is not considered here because most racing springs are carbon steel wire.
Thank you and enjoy.