Dyno SAE Correction Factor Question
Dyno SAE Correction Factor Question
I posted this in the Tech section but did not get a response. Figured I would give it a shot here:
The SAE Correction Factor is intended to adjust the HP and TQ figures for the climate conditions. However, does it fully adjust for the temp changes?
As an example, Import Tuner magazine does a "Power Pages" feature each month were they dyno test various mods. Although these are SAE corrected, they also indicate the temp changes between dyno's and indicate that when the temps go up between dyno's it does rob power when comparing two dynos. In addition, there are numerous posts on this site about changes in temp impacting SAE corrected numbers.
How is this possible if the SAE correction factor fully corrects for the climate conditions? (or does it?)
The SAE Correction Factor is intended to adjust the HP and TQ figures for the climate conditions. However, does it fully adjust for the temp changes?
As an example, Import Tuner magazine does a "Power Pages" feature each month were they dyno test various mods. Although these are SAE corrected, they also indicate the temp changes between dyno's and indicate that when the temps go up between dyno's it does rob power when comparing two dynos. In addition, there are numerous posts on this site about changes in temp impacting SAE corrected numbers.
How is this possible if the SAE correction factor fully corrects for the climate conditions? (or does it?)
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Google search for dynojet correction SAE.
The people who say the SAE doesn't adjust for temp, altitude, relative humidity, pressure, etc... are misinformed. (to put it politely).
Google search for dynojet correction SAE.
The people who say the SAE doesn't adjust for temp, altitude, relative humidity, pressure, etc... are misinformed. (to put it politely).
I still have not let this subject go yet. This is an old post from Q45Tech who I consider the guru of tech issues with the G. Our last dyno's showed a 3-4% SAE correction factor (corrected up) due to higher temps from our previous dyno day. Therefore, even if the dyno adjusts up for higher temps due to decreased air density, it does not take into account the G pulling ignition timing in high temp conditions.
Originally Posted by Q45tech
See at lot of problems in traffic and leaving expressway rest areas where the hot soak creates 190-220F under hood on a 90F day........power is down 12% from this alone and the coolant time has spiked from no circulation reducing ignition advance by 5 degrees [summer overheat protective mode keyed to coolant temp]........knocks another 10-15%......where did my power go.
Have manometers/temp probes will travel.
Have manometers/temp probes will travel.
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Originally Posted by FLFIRE
...However, does it fully adjust for the temp changes? ...
Who would run their car super hot on a dyno??? I'm confused...
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