Here's the baseline (green)...
Here's the baseline (green) versus LS1 Power Plan Part I (blue) and Part II (red).
Drag Testing
Drag testing was conducted before and after the installation of the LS1 Power Plan components at the Texas Motorplex in Ennis, Texas, which is a quarter-mile racing facility. The track elevation is 500 feet above sea level, and all testing was performed at the same location.
| Drag Results |
| Baseline Testing |
| Temperature | 75-deg |
| Humidity | 36 percent |
| Barometric Pressure | 30.19-hg |
| LS1 Power Plan Part II Testing |
| Temperature | 67-deg |
| Humidity | 69 percent |
| Barometric Pressure | 29.96-hg |
| Configuration — Best Run | 60-ft | 330-ft | 1/8-E.T./MPH | ¼-E.T./MPH |
| Baseline | 2.08 | 5.67 | 8.61/84.58 | 13.31/104.69 |
| LS1 Power Plan | 2.04 | 5.51 | 8.31/88.65 | 12.78/109.59 |
| Improvement | 0.04 | 0.16 | 0.30/4.13 | 0.53/4.90 |
| Configuration — Average | 60-ft | 330-ft | 1/8-E.T./MPH | ¼-E.T./MPH |
| Baseline | 2.08 | 5.69 | 8.63/84.34 | 13.34/104.38 |
| LS1 Power Plan | 2.07 | 5.55 | 8.36/88.42 | 12.84/109.40 |
| Improvement | 0.01 | 0.14 | 0.27/4.08 | 0.50/5.02 |
Conclusion
In total, the T/A gained 62.1 hp and 36.5 lb-ft of torque. One look at the dyno chart confirms that we weren't simply trading low-end torque and horsepower for high-revving gains. At each point on the RPM and torque curves, the horsepower and torque bested both the baseline and Part I numbers. In total, average horsepower and torque gains of 46.2 and 32.1 indicate that the T/A has significantly more midrange and top-end power without sacrificing low-rpm driveability.
Harold Baker states, "Power has once again been increased and, more importantly, my T/A still maintains a nice idle quality and can be driven anywhere. Although the cam may seem to be large for a stock-bore LS1, it certainly doesn't act like it. By utilizing a free-flowing exhaust and going to an LS6 manifold, the engine was able to use the additional duration and lift to produce some impressive power numbers.