Welcome back to Power Explained; a multi-part series where I explain the tuning process and mechanics involved and how they affect your horsepower numbers. One of the most common questions I get asked in the aftermarket performance world is "I went to XYZ Shop and they said my car made 140hp, but I think it should have made 200hp. What is wrong with their dyno?"
Generally, my response to this is nothing. No I don't mean that I do not respond, but rather, nothing is wrong with the dyno. Now there are sometimes legitimate cases where something is off on the dyno, usually atmospheric readings, but we will get into how various readings can effect your output in a later article.
Usually around this point I ask what modifications your stock EK civic has, to which the response is cold air intake, weld on fart can, and pep boys spark plug wires, or in other words, nothing that actually gives you power.
Now as you recall from last week, a dyno is nothing more than a tool, just like a hammer, so when you hit your thumb with a hammer, do you blame the hammer or the user? Exactly, the hammer, then you immediately banish it to the outskirts of the garage for it perilous ways. Unlike the hammer however, when the dyno does not give you the horsepower number you want to see, it is usually because of the car.