Nelson Engineered Performance LLC

How we measure balance that counts at Nelson Engineered Performance

The initial set of “dominant inputs” comprises the balance portion, encompassing Cross%, L/R%, Front/Rear%, and Bite. Our primary focus lies on these inputs in their dynamic state. Although static measurements on the shop floor serve as a reliable reference point, it is the measurement of these inputs in a racing state that yields the greatest value.

When car is pulled down in its dynamic state, you can observe how its balance changes during race travel. For instance, while you may statically scale your car with 75lbs of bite, you may discover that a suspension bind causes you to lose all bite dynamically. Moreover, you may experience a significant increase in cross in the dynamic position due to carrying the left front and losing all LF load. These are just a couple of examples that the pull-down test enables you to uncover.

The position of your car on the track is constantly changing, which makes it important to measure its dynamic balance. To assess this, we have developed standardized position tests and procedures. These tests allow us to assist teams even without initial load or travel data. Additionally, these tests and procedures can be further customized based on additional testing and data availability.

One of the standard positions we focus on is the corner entry. This position is commonly used and teams often dedicate their session time to fine-tuning their entry numbers. In addition to the corner entry, we also offer apex and exit test procedures for further evaluation and improvement.

Once you have achieved your desired dynamic balance, we can bring your car back to a static position and carefully record all the relevant data for future reference. It is also recommended to document shock center-to-center measurements in both the dynamic and static positions, and then record the load numbers using a spring smasher. Keep in mind that wheel loads during the pull-down phase differ from spring loads on the smasher. While chassis manufacturers usually provide useful reference spring smasher numbers (e.g., X pounds at 4″ of travel), you may discover that at your optimal balance and posture, you only travel 3.5″. You can then adjust your numbers accordingly.

At Nelson Engineered Performance, we offer pull-down and spring setup services to help you enhance your understanding and mastery of your car’s dynamic balance. Our team is equipped with the expertise to guide you through this process, ensuring an optimal experience.