oldiebutgoodie
Apostle, Church of Vaporization
My friend just tried the EVO for the first time, and was able to produce much much darker ABV than me using the same material and temp setting. He hits it much slower at first. He really liked the flavor and massive rips. Did 4 ELBs, each with diff strain was all done for the night. Left super glossy eyed.
How much of that do you chalk up to him simply having more lung capacity and draw power? Is he larger or more athletic than you are? . . .
He has larger lung capacity, but it really comes down to technique. I used his method of very very slow draw at the beginning and was able to get darker than usual ABV. Looking at the computer paper with spent bowls it easy to spot his ABV rips and my new ones . . . I am hitting it so slow to the point there is no audible noise then increase my draw to whistle speed . . .
A friend with whom I've done many EVO sessions, consistently gets lighter ABV than I do. Exactly the same setup, herb, load, and temp. Except that I take slower longer hits, pulling just to a low whistle. And when the vapor gets thin-to-the-eye he reloads, while I take another 2 or even 3 hits. IMO it definitely appears that technique affects extraction efficiency, and with that, ABV color. (Interestingly, VXL has observed that often maximum efficiency seems to correlate with the low end of the whistle.) I'm not at all suggesting that there is one "right" technique nor that one user's is necessarily better than the next's. That said, technique clearly can sometimes make a significant difference.