Well, these readings are a little torturous to take
So far, I've only tested from 460f to 560f at 20 degree intervals, but some things I've noticed at all of these temps so far is...
It takes about 3 minutes for the inner bowl temp to stop ramping up in temp rapidly, even without drawing. Up till that point, the readings can obviously be a bit haphazard. After that three mins, the readings are a good 20 - 40 degrees OVER what they would be if you were using the bowl from cold.
Cool down of the bowl is obviously significantly slower than heating it up, but I didnt think re-heating a cooling bowl would get as hot as it does so quickly.
With the controller set to 560f - After leaving the head on the bowl for 4 minutes, the bowl temp reached 290f. I left the bowl cooling for 4 mins, which took the temp back down to 150f. Within 30 seconds of the head being back on the bowl, the bowl temp was back up to 230f, and within 2 minutes the bowl temp was back up to 290f. I stopped reheating the bowl at 4 minutes, bowl temp had reached 310f. As a quick comparison, 310f is setting 3 on a Volcano.
All this means taking accurate bowl temps is a bit tricky!
I'm still trying to figure out if theres any useful conclusions to make from all that obvious shit I just typed out
But at least I think now I understand how some of you have had melted handles at higher temps!
I've reconfirmed what I found before too...
And this is where I got high - 560f on the controller, carb capped thru the whole draw, with a draw speed that means you can hear the air rushing through the carb caps hole (moderately fast, not pulling hard), is approx 420f/430f in the bowl. Thats pretty much full power on a Volcano. I got the same result at this temp without the carb by inhaling slowly and utilising the fast heat up time the bowl itself has; the first inhale with this might not be great but the second inhale, considering how quickly the bowl is now going to ramp up in temp, took me a little by surprise.
Just noticed that at 560f, carbed inhales can easily knock 20 degrees off the controller/coil. Uncarbed, barely 5 degrees gets knocked off.
I suppose this means if you do two bowls in a row, the second is likely to hit much harder/quicker. Also, if these kinda tables are to be believed, and if Im getting 430f at a slow inhale, uncarbed, 560f on the controller...
Good enough for me!
I'll check temps for 560f to 660f next, then try and get this into a table that makes sense.
TMI?