TLDR: got a new piece, but have to lower temps 100 degrees to get comparable results? can anyone help explain why that may be?
so, i got a new piece yesterday that is going to be dedicated to the flowerpot.
https://www.dhgate.com/product/12-inch-ccg-straight-fab-glass-bongs-oil/402029338.html
but i have been using the flowerpot on a larger piece since i received it shortly after the last 420 sale (2018). showerhead @ 750, vrod @ 650 using an ~18" straight tube, approx 2" in diameter. the perc on the tube is a custom job by a local guy. its almost like a fritted disk, however its not frits, he calls it loop-stitch, where the glass is almost crochet like.
anyway, the new piece arrived yesterday, its 18mm, where as the straight tube is 14mm, so while the flowerpot was heating up, i gave the new piece a quick iso wash. filled it with water swapped out the 14mm post for the 18mm post in the shovelhead.
first pull, oh shit, i see that bright orange glow through the showerhead holes... damn, combusted.
wiped everything out, rinsed out the bong, and proceeded to try again, pulled just a hair faster this time, and much better results. still seemed a little hot though. by now the wife is home and im loading her up a bowl, she's anxious to try the new piece as well.
shes almost done with her pull and again, bright orange glow. she says the vapor is much harsher than with the straight tube. again wipe out the bowl, change the water, and lower the PID to 650. wait for it to stabilize and we try again. much much better results this time.
has anyone else had similar experiences? do you have to adjust temp (drastically?) if you change bongs? can anyone help pinpoint why i combust at 750 uncapped on the 12" straight fab, but dont on the 18" straight tube?