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The dyno screen compares the power of our baseline pull (black trace) with our final pull (red trace). The changes to jetting and ignition timing gave us another 13 peak horsepower, but as you can see from the graph, the increase under the overall curve is far more dramatic, especially at the "hit" where the converter locks up. This is a difference we can really feel in the seat of the pants. With a properly sized, tighter torque converter, the result should be even better. Four hundred rear-wheel horsepower may not be out of the question.