Adjust Ignition Timing - Ahead Of The Curve
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Next, a laptop is used to draw a new ignition curve graph. Here you can see the new graph, and the way it's stepped and tailored to our truck. The program is downloaded to the Icon via the printer port and cable on the laptop. Then, the fun begins with pulls made on the chassis dyno. After each run, the dyno chart is printed out, and the timing is adjusted accordingly. The new program is downloaded, another pull is made, and the next two hours are spent tweaking the ignition curve. When we were done, we picked up 8 peak horsepower, but we also got more than 18 lb-ft of peak torque, both at the rear wheels. Power was increased--fairly uniformly--over stock throughout the entire rpm band. View Related Article
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