What is "CORRECTED HORSEPOWER"
Thread Starter
Burning Brakes
Joined: Aug 2008
Posts: 819
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From: Tampa (Cigar City) (The Big Sombrero)
What is "CORRECTED HORSEPOWER"
What exactly is “CORRECTED HORSEPOWER”? I see that term all the time and I’m not sure what it is. I live at sea level, and I’m assuming it has something to do with dynos that are not at sea level.
Thanks in advance?
Thanks in advance?
Racer
Joined: Jul 2006
Posts: 486
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From: Bethlehem PA
Safety Car
Joined: Dec 2009
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There is STD and SAE correction, both correct to a specific temperature and humidity. SAE is more commonly used on these boards. Uncorrected HP is just what the car puts out on that day, in those conditions w/ no correction.
Platinum Supporting Vendor
Joined: Sep 2001
Posts: 3,665
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Corrected is the standard, so that you can compare a dyno chart with a car in NC or in Northern California. Depending on the day the correction could add to the actual power the car made or it could remove power the car made. It is helpful when building in steps so that you have somewhat of a "baseline" without added factors being part of the equation. However the number that is represented does not represent what the car is actually making that day unless the correction is 1.00. You could be making more power or less power depending on the conditions.
Racer
Joined: Jul 2006
Posts: 486
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From: Bethlehem PA
Also, keep in mind that some people will constantly argue corrected numbers, the correction factor, etc. Some brands of dyno tend to apply different correction factors, so they'll read higher/lower than other brands. Other people will quote corrected vs. actual either because they don't know any better, or because corrected typically ups the number a bit, and bigger sounds better. Keep that in mind when comparing numbers.
If you're looking at your own gains, it's best to do a baseline, then a final on the same day and in the same conditions if possible, as temps, humidity, and altitude all play a factor in the correction.
If you're looking at your own gains, it's best to do a baseline, then a final on the same day and in the same conditions if possible, as temps, humidity, and altitude all play a factor in the correction.
Race Director
Joined: Mar 2005
Posts: 10,399
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From: Austin Texas
Sea level (elevation) is only a part of the corrections. Barometric pressure, humidity and temperature also have to be factored in.
