RM2 airhole size

[cioranes]

Maybe everybody could post here what size they enlarged their RM2 airhole to compared to the ohms they're vaping. We could end with some kind of chart, with of course personal preferences coming into play. Please state if you take mouth or lung hits.
I won't start as I am here to learn, wondering if I should enlarge more. Currently around 1,3mm @ 0,7 ohms and feeling juices getting quite hot, but not wanting to lose flavor, or to have to take lung hits.
Thanks!
(I know I should experiment myself but have only one RM2, waiting for the sub-ohm kit for my next big command - overseas)

 

[malkuth]

I use the standard air hole and vape at 1.6 ohm. That is plenty warm enough for me. Oh, I do mouth hits, the same as when I did analogs.

 

[Raynman]

I take mouth and lung hits depending on my mood. I run .9 ohm and I have enlarged the hole to a number 54 drill bit. Seeing you're from France that likely means nothing so saying .055 of an inch probably means the same. Looked it up and it's very close to 1.4mm. I'm going up in steps but will stop at 1/16 of an inch a little less than 1.6mm.

 

[Matthee]

Can someone first please tell me what is a "mouth hit" and what is a "lung hit"?

 

[txgtr]

A mouth hit is when you pull the vapor into your mouth, then you either just blow it out, blow it out through your nose, or pull it into your lungs then blow it out. Lung hits are when you pull the vapor directly into your lungs.

It seems that folks that like the huge thick clouds like lung hits, I'm guessing thats because you can probably hold more vapor in your lungs.

I do both, but probably more lung hits than mouth.

 

[sbmqcy]

Its a description of how you're pulling the vapor into your body--with a mouth hit, you are simply using the suction of your cheeks and mouth to draw in vapor. With a lung hit, you are directly inhaling the vapor into your lungs and are using your lungs to generate the vapor draw. That's what I think I know.

What I believe is also that lung hits draw more vapor, faster, across the coil(s) whereas mouth hits draw less vapor, slower, across the coil(s).

eta: Darn, got beat to the punch

 

[Matthee]

Thanks txgtr and sbmqcy, now you also need to supply the requested hole information! Ok, then I do mouth hits on around 0.8 to 1.0 ohms with the standard air hole.

 

[sbmqcy]

I'm useless.
.
.
.
For answering that question. I'm still anxiously anticipating the mini I got from the classies. It's due to arrive Thursday. I'm actually really curious what you here from folks on this topic.


Sent from my mobile

 

[txgtr]

At the current time I'm using the RM2 with the standard airhole. My preferred coils are usually at about 1.7 Ω

Thus far I've not delved into the sub-ohm realm. I just received another RM2 and do plan to enlarge the hole and do some experimenting.

 

[pdib]

I do mouth hits as follows:

.3-.4Ω @ 1.6 & 1.7mm
.4-.5Ω @ 1.5 & 1.6mm
.5-.6Ω @ 1.35 & 1.4mm
.7Ω @ 1.3mm

 

[Jeremy Evans]

I don't have an RM2, but I find 1/16 to be the happy medium to enjoy lung hits or mouth hits. But most everything I own is now around 2mm, I have a few other atty's for tube mods slightly bigger than that too but for my DD it is a Era on my reo with a 2mm airhole and a rocking .6-.7 micro in it.

 

[cioranes]

I do mouth hits as follows:

.3-.4Ω @ 1.6 & 1.7mm
.4-.5Ω @ 1.5 & 1.6mm
.5-.6Ω @ 1.35 & 1.4mm
.7Ω @ 1.3mm

Thanks!
Soooo... I guess my 1.3mm is fine after all. Wasn't sure I was not missing something.

 

[NicoHolic]

I thought about drilling one of my spare RM2s, but never got around to it. To me, the stock air hole draws like the wrap of a fine cigar, not the overly tight or loose wrap of a cheap cigar. It's also like one of my Savinelli pipes with the balsa filter, not loose like the same filterless and without the reducer tube. But as with cigars and pipes, I don't inhale vapor into my lungs.

 

[pdib]

Thanks!
Soooo... I guess my 1.3mm is fine after all. Wasn't sure I was not missing something.

Well, like you said; it's very much a matter of personal preference. Many seem to go bigger sooner than I. I wouldn't enlarge it unless the vape seems consistently too intense. An over sized air hole is a very disappointing vape.

 

[Matthee]

Well, like you said; it's very much a matter of personal preference. Many seem to go bigger sooner than I. I wouldn't enlarge it unless the vape seems consistently too intense. An over sized air hole is a very disappointing vape.

That is wise advice from the master of holes himself.

 

[Gigdujour]

I do a mix of mouth and lung hits. I keep thinking about drilling out one of my RM2's, but haven't (yet) as I'm quite pleased with the vapor production and flavor of the stock holes. I do drill out all of my drippers/gennies to 1/16" though.

 

[JC Okie]

If you DO decide to open up your airhole, be careful.....do it slowly. Because the RM2 is brass, it's very, very (almost too) easy to ream it out....and you can get it too big really quickly. I use a little jewelry reamer/file, and I have done a couple of mine a little bit at at time. I can't tell you how much I did because I can't seem to measure the holes. But I know they're not even 1.6 mm. I got one off the classifieds along with a REO the other day, and the hole was way bigger than I had ever tried before. I've ended up putting a silicone ring around it to cover about half of the hole so it's not too airy. So, there is a make-shift fix, but if you can prevent it in the first place, do.

 

[eHuman]

Along with what JC Okie said, keep in mind: When you double the size (diameter) of a hole (circle) you roughly quadruple the area. So you are not doubling the airflow volume your are quadrupling it.

Area of a circle = pi*r²
(Baseline diameter of "1" units) = 3.14*.5² = .79 area
(Increase to diameter of "2" units) = 3.14*1² = 3.14 area
(Increase to diameter of "4" units) = 3.14*2² = 12.57 area

If you don't know your sweet spot, increase in increments or you will exponentially increase air flow and risk ending up with a cap you don't want to use.

If you have a stainless steel corkscrew, put it in the air hole (both from inside and the outside) and bobble it around to open up the air flow a little at a time. This is especially useful if you don't happen to have a nice drill bit index, and it works on SS RBA caps too.

 

[pdib]

That is wise advice from the master of holes himself.

Now . . . . how is a person to take this little comment?

 

[super_X_drifter]

I run a 1/16" hole in all my RBAs. I currently run 1.5 ohm micro coils.

I mouth hit then draw vapor into lungs. I'm not big on TH so I run my coil low in the bowl but not so low that I interfere with drainage.

Interestingly enough, my first RBAs - hornets - had stock air holes. When I got my first chalice, it was drilled to 1/16". I HATED it. Considered selling it even (that and the nasty taste of pluid in it). I got it cleaned by boiling in dawn several times. Then I vaped it, airy draw and all. Got my second chalice about a week later. The stock airhole was like trying to drink a Wendy's frosty thru a cocktail straw. I had become acclimated to the 1/16" air situation.

Since then I have drilled all my RBAs to 1/16". The chalices, being thick stainless, were a bear to drill compared to the RM2.

The trick is, you have to draw a little slower with less force when you have a 1/16" airhole. I think anyone would get acclimated in a very short time