How can I get more airflow in my Kayfun Lite+ V2?

[relink2013]

Just as a little back story, I bought a "supposed" KF v3.1 (clone) off ebay, when it arrived it was infact a very very crappy Russian clone. So I borrowed my friends KF3.1 for a day and loved it! The next day I went to my local shop and bought a KFL+ v2 and so far it's night and day difference from my original.

So heres the heart of the matter. I noticed the draw on my KFL+ is a bit tighter than that of the v3.1, is not much more than my Kanger Aerotank wide open. I like a little more of an airy draw like the 3.1 has. Now I have already removed the airflow control screw and it's still a pretty tight draw. So with the AFC screw removed and the fact that the air hole is already pretty big, there is no need for me to drill it out anymore, I already know I wont gain anything by doing that. So my next thought would be the center post, does anyone make aftermarket center posts for the KFL that have a larger hole running through them? or is it even possible to drill it out myself without damaging it? or am I just way off base here?

 

[Bunnykiller]

unfortunately the airhole in the center post is the limiting factor in the kayfun style atties... drilling it out would be a major PITA and without the precision of a CNC milling machine or lathe certian doom will occur. The main issue would be removing enuf material to increase airflow but in doing so it would weaken the post to a point that the threads will snap.... KF & KFL's are flavor machines not too much on air flow...

 

[relink2013]

Damn, that's what I was worried about. I do actually have a lathe and milling machine, but compromising the integrity of the threads was my main concern. hmmm...I wonder if the center post from my reject clone would fit my new one, if it does then maybe I can try it out on that one before risking damage to my new one.

Oh and your not kidding, the flavor on this thing is outstanding! the vapor production is nothing to mess with either especially with a 1.1ohm coil @ 10W, just a little tight on the draw.

 

[BostonVape]

so you dont have the adjustable airflow hole on that version KF?

 

[relink2013]

so you dont have the adjustable airflow hole on that version KF?

I do, I actually removed the airflow adjustment screw completely and it's still a little tight for my liking.

 

[Knifemaker]

I use the 3.1, and my wife has the EHPro light +
I too found the airflow too restricted. I put it in the mill and went larger with a slightly larger bit. didn't measure. Went by sight. I did notice that even though the od of the threaded bolt is the same as the 3.1, the id of the hole is smaller. I matched them. I selected a bit that would fit into the 3.1 for the project.

To keep from damaging the bolt, I left it installed in the base of the Light + for the drilling. This will keep it from breaking out or collapsing. Buuuuut, I probably would not have tried this if I hadn't had a spare!

It worked very well indeed!

A suggestion, If I may. Everybody and his uncle says to drill at a very slow speed. NO! Stainless is very sticky, and a higher speed will do much better at chip removal, and the cut will be so fast with a high quality bit that lube is NOT needed for such a small, short cut. Very slow speed most times ends up in a snapped off bit in the work!

I would probably not be removing and re-tightening the post after the mod. It will be thin, and can fail.

KnifeMaker

 

[BostonVape]

I do, I actually removed the airflow adjustment screw completely and it's still a little tight for my liking.

oh wow haha you might like it pretty loose (no pun intended)

 

[relink2013]

Good to hear that someone else has successfully done this already. I may attempt it on a replacement post, so I don't risk my current one. Although I'm actually starting to get used it, I have some Moonshiners juice in here now 90% VG and whoa! im taking little 2 seconds mouth hits and blowing out clouds! lol

 

[vapdivrr]

although I haven't bored out the center hole in the post, I have enlarged the main air hole. in my k-lites the main airhole was 1/16, I bored out to 5/64. although like mentioned above that the center hole in the post is the limited factor, the enlarged main air hole did make a fair bit of difference. I can now lung inhale as before I really couldn't. some also have mentioned that just by countersinking the center hole in post,(instead of boring it out) this further opens up the draw. and lastly, countersinking the very top of the center post( the end that is in the positive block) while actually in the block, also helps a smidge. I think all of these in combination is a pretty good modification to the draw.

 

[SteamHead]

relink, don't be scared, drill that thang out! I'll repost this for you from a thread a couple of days ago...

"Anyone unsatisfied with the draw tightness of a stock kayfun REALLY needs to consider drilling out your center post! Drilling 1/16th is a cakewalk, i did both of mine with a dremel, a COBALT steel bit (VERY IMPORTANT), and some vise grips. 5/64ths is where you'd wanna be very, VERY careful (i wouldn't suggest attempting 5/64th without a drill press and an extra center post handy). Just make sure the bit is cobalt steel (@lowes, dewalt brand is like $2.18) and use a few drops of cutting oil (e-juice works) to keep the heat down. Its not too far from 1/16" already, so it's super easy.

I also reamed it out a lil by wiggling the bit around after it was through. Drill the horizontal hole out as well. Best upgrade I've made to any vaping equipment, between that and rayon wick, the kayfun is like a totally different device now, output is close to a dripper."

 

[MrPlink]

Wasnt somebody supposed to sell KFL center post replacements that were pre bored out?
I thought it was Fat Daddy but I don't see it on their site.

I prefer almost everything about the KFL over the 3.1 save for the tighter draw.

I am part "owner" of a lathe, but the other owner has it buried deep in a warehouse so I dont think I will get access to it any time soon, so I think just buying one is my best bet.

 

[vapdivrr]

Just as a little back story, I bought a "supposed" KF v3.1 (clone) off ebay, when it arrived it was infact a very very crappy Russian clone. So I borrowed my friends KF3.1 for a day and loved it! The next day I went to my local shop and bought a KFL+ v2 and so far it's night and day difference from my original.

So heres the heart of the matter. I noticed the draw on my KFL+ is a bit tighter than that of the v3.1, is not much more than my Kanger Aerotank wide open. I like a little more of an airy draw like the 3.1 has. Now I have already removed the airflow control screw and it's still a pretty tight draw. So with the AFC screw removed and the fact that the air hole is already pretty big, there is no need for me to drill it out anymore, I already know I wont gain anything by doing that. So my next thought would be the center post, does anyone make aftermarket center posts for the KFL that have a larger hole running through them? or is it even possible to drill it out myself without damaging it? or am I just way off base here?

The 5/64ths I mentioned was the horizontal main air hole, not the center post hole. Yes to bore out the center post hole to 5/64ths would be a breaker.

 

[crxess]

Okay, some people just sort of spout out B.S. Maybe the want to feel included.
Others offer good advice. Thankfully we have many smart Vapers on ECF and Thanks to all that help!

Now, before going Drill happy or tossing any Good Device, thinking it is junk, there are procedures that should be followed.

In this instance - KFLv2 Poor air flow (original/clone?)
First thing to do on Receipt is disassemble fully(All parts) Thoroughly wash every part. Use a paper clip or small drill bit/needle/etc. to probe all openings for any obstructions(metal/plastic pieces) and any deformations.
Once everything is considered in order, reassemble and build.

I own 8 Kayfun type toppers
I have gotten debris out of 8 Kayfun toppers
1 Kayfan had an air channel that reduced in size just before the Air adjust screw channel - Drilling to Factory size corrected that.
1 Kayfun shed the tip of the adjusting screw after several weeks in use, partially blocking the air channel. Once removed, air flow was back to full.

Yes, the Kayfun can be drilled for more air flow - assuming it actually needs it.(check/clean first)

No, the center pin is not normally a problem. The diameter of the center pin is much larger than the horizontal Air channel.
The center pin also has 2 holes to allow air entry.
The Vertical channel is larger than the center pin and air will freely flow around the pin
*Lower Grommet - some Kayfuns have the air channel ant Pin holes bored to low resulting in the Grommet partially blocking air flow.
(Simple fix) remove center pin - run drill bit through to notch grommet - reassemble.

Kayfuns are not Cloud chasers, but even my $12.xx Cheapo does an excellent imitation.

Lastly on Air flow - Don't forget Wick/coil placement. An improperly placed coil will reduce airflow.

 

[relink2013]

Good to know, I never really thought about disassembling and checking for obstructions. When I go to do my weekly cleaning I will take it a bit further and check. But to be perfectly honest, I've almost gotten used to it at this point. lol