Why Most “High-Performance” Camshafts Actually Made Engines Slower

Bigger lift. Longer duration. Aggressive idle. For decades, “high-performance” camshafts were marketed as instant horsepower upgrades — but in many street builds, they actually made engines slower. In this video, we break down why oversized cam specs can kill low-end torque, ruin drivability, and mismatch compression, gearing, and airflow. From valve timing fundamentals to real-world dyno results, here’s why the wrong camshaft can turn a strong engine into a sluggish one.