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Fat Daddy 510 bottom feed

Discussion in 'Bottom Feeder Mods' started by Quigsworth, Aug 5, 2014.

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  1. Quigsworth

    Quigsworth Just some guy... ECF Veteran Verified Member

    I looked around a bit on this but I'm a little lazy :facepalm:...anyone use one of the Fatdaddy 510's to bottom feed?...I got a couple and a quick look tells me I can complete the hole drilled in the pos. pin and solder a tube but does it leak because of the spring mechanism?

    Anyone with any experience on this would be appreciated...
     
  2. AaronY

    AaronY Reviewer / Blogger ECF Veteran Verified Member

    Mar 26, 2011
    Santa Monica
    I am interested to know the answer too.
     
  3. Kataphraktos

    Kataphraktos Vaping Master ECF Veteran Verified Member

    May 1, 2013
    New York, NY
    We are using the original FD 510s modded to do bottom feed in the DNA30 BF mod here.
     
  4. dr g

    dr g Moved On ECF Veteran

    Mar 12, 2012
    Paradise
    There is no reason I can think of the spring would cause it to leak. The FD has an oring seal that would prevent leaking. So you would need to extend the center pin down a little bit and solder the pos to the outside of that extension.
     
  5. vapero

    vapero Ultra Member ECF Veteran Verified Member

    Mar 13, 2013
    monterrey,mexico
    do you have a link to that 510?
     
  6. Quigsworth

    Quigsworth Just some guy... ECF Veteran Verified Member

  7. Quigsworth

    Quigsworth Just some guy... ECF Veteran Verified Member

    So I drilled out the center pin (more like completed the wire hole already there)...I then dug through my crap box and found one of those needles used to pump up footballs/soccer balls...I got lucky and it "just" slid in so I soldered it up and trimmed it for length...

    I put it all together, screwed on an RDA, attached a bottle/tube and did a test squonk...and it leaked all over the place. But, the culprit seems to be the o ring, I changed it out with a larger silicon washer I had from my RSST days and it works great.

    I think the issue may be if you have an RDA with a shortish 510 that doesn't force the center pin down far enough, the stock o ring doesn't make the seal between the pin and the brass base the pin slides through (I don't know how else to describe it, if you have one you'll know what I'm saying)
     
  8. turbocad6

    turbocad6 Unregistered Supplier ECF Veteran

    Jan 17, 2011
    brooklyn ny
    I've been screwing around trying to make an ideal spring loaded or adjustable bf 510 that doesn't leak and it's a lot trickier than it sounds while keeping it compact. so far I've been having best results using an o ring as a cushion type spring to keep it adjustable somewhat, kinda like the stock reo does with it's 510 packing but I have a few ideas I want to try next. ideally it can go from the shallowest to the deepest 510's out there and not leak at either extreme and not sacrifice good conductivity either

    [​IMG]

    [​IMG]
     
  9. Quigsworth

    Quigsworth Just some guy... ECF Veteran Verified Member

    Same...my journey went from getting tired of messing with the MV el crappo "large hole" connectors :facepalm:, then I bought a 7mm x .5 tap and played with some fringe ideas (with mixed sucess) then as the RDA "clone wars" started and you could drill holes in them and not feel bad I realized that I don't swap RDA's once I get a good set-up so I just said screw it and started making custom RDA center pins and hybriding them to mods (negating the 510 altogether which ultimately works the best if that's your gig and you can make mods to go along with them)...but now that I got the FD 510 to bf with no leaks...hell, for $5...I've spent $5 on stupider things :p
     
  10. disturbed1

    disturbed1 Super Member ECF Veteran Verified Member

    Aug 2, 2012
    CT
    I did it with the FD. I just used a 14g blunt tip and slid it straight through. Then I sweated some lead free solder in. Worked like a charm.



    I think the only snag is going to be juice leaking out the air vents on the 510 but a O ring should fix that.
     
  11. disturbed1

    disturbed1 Super Member ECF Veteran Verified Member

    Aug 2, 2012
    CT
    Okay so you guys got me thinking about it leaking into the spring part. So I just did a water test and it does :mad:. I'm wondering If I put another small O ring in the 510 would that seal it from going in to the spring when an atty is screwed on. Or do you think that would impede the spring from doing its job? What do you think.
     
  12. dr g

    dr g Moved On ECF Veteran

    Mar 12, 2012
    Paradise
    FWIW fat daddy has just released a bottom feeder pin which is longer and has a hole in it already.
     
  13. Quigsworth

    Quigsworth Just some guy... ECF Veteran Verified Member

    3mm is a bit shy, as soon as you wrap a wire around it for power you don't have much left for a tube...

    ...as much as I appreciate the bf love, come on, go 5mm or even more and we'll cut to suit...I'll just stick to modding the stock ones. just saying...
     
  14. Lentulusbatiatus

    Lentulusbatiatus Senior Member ECF Veteran

    Sep 19, 2012
    Wakefield
    trouble with the stock ones they are brass aren't they ? ss would surely be better for a BF.

    An extra O-ring would do the job but on the top part of the center pin, it would have to tight enough to seal but not so tight the spring didn't work to push the pin up.
     
  15. Quigsworth

    Quigsworth Just some guy... ECF Veteran Verified Member

    I took out the stock o ring and put in this silicon "washer" type o ring I had in my crap box (no idea what I got them for originally) zero leaks.

    As far as it being brass, meh, doesn't really bother me... just give it the vinegar/hydrogen peroxide bath for 5 mins. Plus if it was SS, even with the Ruby flux, getting it hot enough to take solder without melting your seal (which has to be installed first) would be next to impossible.
     
  16. Lentulusbatiatus

    Lentulusbatiatus Senior Member ECF Veteran

    Sep 19, 2012
    Wakefield
    you couldn't put the seals bottom cap etc over the cable and then solder the cable to the pin before putting it together ?
     
  17. disturbed1

    disturbed1 Super Member ECF Veteran Verified Member

    Aug 2, 2012
    CT
    just so you all know FD now has BF pins you can buy. $3.99 for 5 . Just ordered a set to check them out.
     
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