It's interesting, I'm getting fantastic performance with SS430 using its TCR of .00138, but that TCR fails the 212F water test calibration (which works well on Evolv and Joyetech chips).
It doesn't matter, what works is what wins. It's just an observation.
The water test calibration puts the SS430 TCR at like .00078, and the actual vape is then underpowered. With Joyetech and Evolv, the water test will sometimes produce nonsensical TCRs, but it will at least be calibrated such that it vapes as expected at expected temps. In other words, the calibration to water, works (even though the TCRs look funny compared to published material charts).
Yihi appears to be employing some different methodology to the other guys, which results in wonky water tests that fail to calibrate the mod, but still delivers an extraordinary experience using more real world TCR values (at least in the case of SS430).
That said, it's clearly using the same methodology as a foundation and steering factor, because the water test does trend in the direction that would be expected (a high TCR boils water at a displayed temp below 212F and low TCR boils water at a displayed temp above 212F).
*shrug*
There will be no sleep lost here, as long as I keep getting this stellar performance.
Edit / Update: My room temp and base resistance measurements may have been off a bit. I did a more accurate water test using some external probes for air temp and let the base resistance settle more, and am now getting a somewhat more reasonable 0.00098 as the TCR, as the SX sees it, for boiling water at 212F. It's still low for SS430, and still a bit anemic a vape, but is now at least in striking range. I'm going to upgrade my answer to "unconfirmed" as to whether water test calibration is possible on the SX. Right now, I'm rocking the calibrated build and getting a decent vape on a 50/50 VG PG at 480F. It seems a bit high a temp to have to set, but will withhold judgment until I can do more testing.
