How to Choose the Right Shock Valving for Your Modified

By Kevin Shatto  |  April 15, 2026

Shock valving can make or break your handling. Here's how we choose valve codes for different track conditions and driving styles.

Shock valving is one of the most misunderstood aspects of race car setup. Most racers buy shocks based on what their buddy runs, but every car, driver, and track is different.

Understanding Compression vs. Rebound

Compression controls how fast the shock compresses (hits a bump or dives into a corner). Rebound controls how fast it extends back. Getting the balance right between these two is where the magic happens.

What We Run

On our modified at Shady Bowl, we typically run a softer compression with a firmer rebound on the right front. This lets the car roll into the corner smoothly but controls the weight transfer coming off. On a tacky track, we'll stiffen the compression to keep the car from diving too deep.

Tips for Getting Started

1. Start with the manufacturer's baseline — they've done the testing
2. Change one corner at a time — don't adjust all four at once
3. Keep notes — write down every change and how the car felt
4. Talk to your shock builder — tell them your track, your problem, and let them recommend

When to Rebuild

If your shocks have more than 30 races on them, get them dyno checked. Valving wears over time and you might be running softer than you think.

Have questions about shock selection? Give us a call — we'll help you pick the right setup for your car and track.

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