Hyperco’s racing suspension springs, which have become known by today’s racers as Hypercoils, were originally pioneered inthe early 1960s by Jim Fielder. These springs were popular in the racing industry and the spring designs have evolved into the popular Hyperco brand.
Recently, Hyperco has joined the OneDirt party and we asked them for some tips and tricks regarding suspension springs. Addressing some of the more discussed technical topics in suspension technology at tracks these days, our friends at Hyperco came up with these tips:
Unloading Suspension Coils During Transportation
Whether or not it is necessary to unload the coils in the pit, or block the car while it is being transported depends upon the type of suspension coils you use. If you purchase high quality springs with the correct length, and are also designed for the rigors of professional racing conditions you should not need to jack up the car. You must also ensure that the spring is not being slammed or hammered coil bound. This could happen if the car becomes airborne, and bounces one corner or hits a curb.
Avoiding Ride Height Disqualification
Unpredictable spring performance can result in disqualification after the ride height has been measured.
Poor quality springs can loose free length and then seem to stabilize. The problem that can arise is that the performance of the springs is unpredictable. For such springs, this means that it is impossible to know with any degree of certainty what is the free length / installed height at a specific moment of time. This could result in disqualification when the ride height is inspected by technical officials.
The good news is that it is possible to avoid the worry of this problem. Hypercoils are designed and manufactured to maintain their free length and installed height for life.
How to Avoid Suspension Coil Rate Overlap
‘Rate Overlap’ occurs when the manufacturer’s manufacturing tolerance is more than one half the rate change desired. For example, assume you are considering a rate change from 475 to 500 lbs., which is a change of 5.3%. Further assume that the spring manufacturer’s tolerance is plus or minus 3%, a tolerance level, which is very common among manufacturers today. It is possible, therefore, that the rate for your 475 lb. Spring could range from 460 lbs. (475 X 97%) on the low end to 489 lbs. (475 X 103%) on the high end. The rate for your 500 lbs. spring could range from 485 lbs. (500 X 97%) to 515 lbs. (500 X 103%). In the worst case, you could be going from a 460 lb. Spring rate to a 515 lb. Spring rate, a 12% variation (remember you were looking for a 5.3% change!) that would dramatically affect your car’s handling, and leave you scratching your head, wondering what to do next.
At Hyperco, we have invested in material and manufacturing technologies to ensure that our spring rates are accurate and consistent. While we guarantee plus or minus 2 percent tolerances, in actual experience, Hypercoils generally run within 1 percent tolerances, and we do not offer rates that overlap. Consistent rates and manufacturing tolerances allow our customers to develop “set ups” that repeat race to race, year to year, and coil to coil. This is one of the reasons the many of the top teams in all forms of motor racing use Hypercoils.
For more information on these topics, or Hyperco’s line of products, visit them online at www.hypercoils.com.