Dyno Graph - Real Wheel Horsepower

Going beyond the dyno graph...Spend enough time comparing dyno sheets and you will begin to wonder why so little information is normally considered enough. In the real world, most numbers come with additional data, data that is necessary to make a full decision. For example, if we said "John has been on a diet for six months and hasn't lost any weight at all," you might assume that his diet is terrible. Of course, if we continued by saying, "but he gained 15 pounds of muscle mass, can now bench three times his body weight, and finished a half-marathon on his first try," you would get the full picture, proof that John's diet and exercise plan was working well. The same can be said for the dyno. For instance, if we said, "Installing the new intake manifold and cylinder heads only picked up five rear wheel horsepower," the natural reaction would be to think they weren't worth the money. Completing that sentence with, "however, looking at the datalogs showed a 3-psi drop in overall boost, a 35-degree drop in incoming air temperature and a slightly lean condition throughout the run," we would know that the new combination was actually much more efficient and capable of making significantly more power, assuming we could get the missing boost back and add enough fuel in the tune up to compensate for the increased airflow. You see, you can't ever go off horsepower and torque alone, they just don't tell enough of the story, which is why looking at and understanding datalogs is essential..

Photo Gallery: Dyno Graph - Real Wheel Horsepower - GM High-Tech Performance Magazine

Photo Gallery: Dyno Graph - Real Wheel Horsepower - GM High-Tech Performance Magazine


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