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Old 05-16-2015, 11:57 AM   #1 (permalink)
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ABA test, Tuft test.

I'm new here and have read the forum for a good 10 hours. I've read people doing the ABA test 20 times, but still haven't found the definition of it? Same with the tuft test, but the videos I watched sort of explained this test.

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Old 05-16-2015, 12:27 PM   #2 (permalink)
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ABA...

A Test without mod.

B Test with mod.

A Test without mod again.

This is to make sure that any gain in economy with the mod isn't due to differences in run conditions (temperature, traffic, wind, etcetera).

Of course, it's not perfect. Some people do ABAB, AABBAA, or even ABABAB.

It's all down to how much time/money/patience you have.

-

Tuft test is attaching little dangly things ("tufts") that move in the wind (string, paper streamers, whatever), and photographing/videoing them as you drive the car along. (Errh... best if you have someone follow and photograph/video you.) This lets you see how the air moves along the body of the car... and identify areas that might be improved with mods.
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Old 05-16-2015, 01:36 PM   #3 (permalink)
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There is a thread on it here :

http://ecomodder.com/forum/showthrea...ery-11445.html
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Old 05-16-2015, 03:39 PM   #4 (permalink)
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the idea is to test 1 modification and see if it really works.
By taking the mod off and running the test the same way, you can then see if the mod actually had an effect.
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Old 05-16-2015, 04:02 PM   #5 (permalink)
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After/Before/After
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Old 05-16-2015, 05:32 PM   #6 (permalink)
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actually, test A is the baseline
test B is the mod
Test A is back to baseline
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MetroMPG: "Get the MPG gauge - it turns driving into a fuel & money saving game."

ECO MODS PERFORMED:
First: ScangaugeII
http://ecomodder.com/forum/showthrea...eii-23306.html

Second: Grille Block
http://ecomodder.com/forum/showthrea...e-10912-2.html

Third: Full underbelly pan
http://ecomodder.com/forum/showthrea...q45-11402.html

Fourth: rear skirts and 30.4mpg on trip!
http://ecomodder.com/forum/showthrea...tml#post247938
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Old 05-17-2015, 09:58 PM   #7 (permalink)
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Thanks, fellas. I was assuming this was an acronym.
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Old 05-18-2015, 10:36 AM   #8 (permalink)
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The way I do it sometimes, it really is After-Before-After...
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Old 06-12-2015, 02:44 PM   #9 (permalink)
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Tuft testing:



The tuft that's sticking upright means there is flow separation (bad!)

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