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I know the Friction Facts guy tested chains straight out of the box (DA wins) but I don't know if he did completely stripped chains.
"Of the five models tested, the Shimano CN-7901 (Dura Ace) is the most efficient chain out-of-thebox. The Dura Ace consumed an average of 7.15 watts @ 250W (97.22% efficiency). The results show the SRAM PC-1091R to be the least efficient chain out-of-the-box, consuming an average of 10.27 watts @ 250W (96.05% efficiency)."
"Removing the factory lube and re-lubing with light oil increased the overall efficiency of all 25 samples by an average of 1.55 watts @250W, when compared to the average efficiency from Part 1 of this test. The Shimano CN-7901 (Dura Ace) is the most efficient chain after re-lubing."
Actually he kind of does test stripped (used) chains:
"6 cleaned and lubed chains were ultrasonically bathed in tap water, dried, then tested.
The average efficiency of the chains after a water bath was 6.67 watts. This is an
average increase of 0.24 watts from the average efficiency prior to the water bath.
The 6 water-bathed chains were then ultrasonically cleaned in two baths of lacquer
thinner. The average efficiency of the chains after the lacquer thinner baths was 22.65
watts. This is an increase of 16.22 watts from the clean and lubed state."Unlubed = bad
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hippy
I'd like to have seen a control with absolutely fuck all