I look at it differently:
Even when not spinning, the metal intercooler is still going to absorb heat from the vapor and should, in theory, cool your draw even if not spinning. Right?
Full disclosure- I don’t have any personal experience with an intercooler yet.
Indeed, more surface area in the twisted metal of the vortex cools the hot vapor. Not sure that if it SPINS, it’s going to be better or worse for cooling, but since that may be very hard to measure and prove either way, let’s say in the end it’s subjective to each users individual perceptions. I even believe that my titanium vortex cools a bit more then my wood vortex stem, as the metal of the stem combined with the vortex insert, adds more potential for absorbing the hot vapor, but that could also, just be in my head, as it’s too close to call.
Personally, I don’t care for the DV “M”, stems. For ME, too short, too heavy, too many cuts for bling.
I read the reviews, and confirmed for myself, that the long/standard Simrell Titanium stem did cool my vapor, noticeably to me. I like the smooth thin design, light weight, and no orings. I liked it enough over the DV stems, that I recently bought a Simrell Cocobolo wood vortex stem, same long length.
I’ll leave out the Simrell’s high price and odd shipping and extra insurance, as money should not be included in a blind taste test.
For going through my water rig, with its water cooling, I grab the DDave clear glass 14mm, no carb, glass stem, with a DV SS 20m tip. All IH use, no gas here. For the Simrell stems, I prefer the DV Titanium tips. There would have to be some new revolutionary stem, with even more cooling, but in the form factor I prefer, to make me buy any more stems right now. I don’t reach for the BB9’s either.....