corrected dyno #

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Jun 23, 2009 | 11:40 PM

jackinthebox

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Joined: Aug 2008

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corrected dyno #

Why or what is the point of corrected dyno #s. I was reading another post when it someone said corrected numbers are no good. So that got me thinking and I pulled up my old dyno sheet from yr ago and it said sae corrected wheel power. So are my numbers off and by how much?

Jun 24, 2009 | 12:13 AM

FXSTDSE2

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Joined: May 2008

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From: South Jersey

Uncorrected is what the bike actually did at that altitude, barometric pressure, humidity ant temperature. Corrected it what it should do with all the constants being the same. Corrected levels the playing field. The bike in the mountains may show less TQ and HP then the bike @ sea level, or cooler temps or less humidity. But put both bikes side by side and the bike from the mountains or other adverse conditions may actually have 10% more TQ & HP and spank sea level dude! That is why corrected is the preferred method!

Last edited by FXSTDSE2; Jun 24, 2009 at 12:18 AM.

Jun 24, 2009 | 12:15 AM

Harleypingman

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Joined: Apr 2006

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From: Roswell, GA

Quote:

Originally Posted by jackinthebox

I don't know what you read, but SAE corrected dyno numbers are simply a way to allow an apples to apples comparison by removing ambient air conditions from effecting the numbers. For example, cool, dry air at sea level will have more oxygen and support more fuel at any given AFR than warm, humid air at 5,000' above sea level (like Denver). So the same motor will produce more actual power in the former locale than it will in the latter locale.

The SAE "corrected" numbers take into account the density, humidity, and temperature of the ambient air when the bike is dynoed and adjust the actual hp/tq output to create adjusted hp/tq numbers that, theoretically at least, would allow you to get the same hp/tq numbers regardless of those ambient conditions from that same motor.