What is the correction factor used in Westech and other engine dynos in USA
Engine dyno correction factor?
Janih
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It depends on where they are in the country and what the weather at that time. The correction factor adjusts for altitude and weather. I ran my engine on a dyno in December in San Leandro, CA. The correction factor was negative because we were basically at sea level and the air temp was about 50 degrees. So the observed numbers were higher than the corrected.
Here's a correction factor calculator.
Here's a correction factor calculator.
Yes, i understand this but is it sae j607 or j1349 or something else.
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J1349 has been the standard since 1984. I would assume that is the correction factor being used.
J607 is the most common used by most shops with engine dynos, as it shows the best power with the factors being 60°F, 29.92 Baro, 0.0% humidity vs 77°F for SAE/J1349 for example.
New cars are rated by J1349/SAE.
Here is an example of Observed vs J607 vs J1349 for a W31 350 Olds I built for a restoration.
Thanks, that explains alot!
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