Putting The Power Down: Evil 8.5 Gets New Springs From Hyperco


Our Evil 8.5 Mustang project made its long-awaited debut recently, laying down a respectable 5.21-second elapsed time during that outing with plenty left as we get a handle on the combination. To assist in putting all of the power down that the rowdy small-block Chevy makes and lowering Evil 8.5’s ET’s, a full set of springs from Hyperco were added to the suspension mix. These springs are designed to help keep the car planted and obtain the maximum amount of weight transfer possible on each pass.

The front springs were a perfect fit for Evil 8.5 and went on the car without any issues.

Quality springs start with good materials, and according to Kelly Falls from Hyperco, that’s why they use high-tensile chrome silicon steel for their springs. “This is a very high-strength material that’s on the same level of valve springs, and has allowed us to use a smaller wire diameter along with fewer coils in our spring designs. That translates to a spring that’s as light as possible for its free length and has a much travel as possible, as well. It also gives the spring good linearity for the entire length it travels to keep it very consistent in how it reacts.”

The quality of the Hyperco springs is apparent as soon as you remove them from the box.

Hyperco uses an “Optimum Body Diameter” design concept that enables the end coils to be placed in an optimum orientation. This significantly reduces the amount of lateral load (friction) on the shock and spring assembly when a load is applied. Reducing the lateral load and side force allows the spring do its job and keeps damage from happening to the shock itself.


Here’s the rear springs installed and ready to go.

“Our springs are tuned to have the least amount of bowing as possible, to keep damaging side loads off the shock that will wear on the body, seals, and shafts. This is due to the Optimum Body Diameter and Ultra High Travel elements we add to each of our spring designs,” Falls explains.

Make sure you spring over to Hyperco’s website to see all the different dampening solutions they offer for your racecar.

About the author

Brian Wagner

Spending his childhood at different race tracks around Ohio with his family’s 1967 Nova, Brian developed a true love for drag racing. When Brian is not writing, you can find him at the track as a crew chief, doing freelance photography, or beating on his nitrous-fed 2000 Trans Am.
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