Sofirn Q8 group buy (gb closed, but try PM to Sofirn for discount)

Can someone confirm the size screws for the tail cap please

I read somewhere that they’re M2.5 x 5mm but Henk4U is saying 4mm??

This is the info I had in my notes……

Here’s all the screws below:

Q8 V2 Screw sizes

  • Driver (2): M2.5 × 4 mm
  • Tail PCB (4): M2.5 × 5 mm
  • Reflector (1): M4 × 10mm
  • MCPCB (2): M2.5 × 10mm

Q8 V1 Same Except

  • Driver (2): M3 × 5mm
  • Reflector (1): M4 × 8mm

Edit: The above info is for the original Thorfire Q8.

Thank you, I’ve ordered the correct ones then.

Just finished bypassing the springs and now getting 5030 at 30 sec with 30Q’s … 300 lumen increase, not bad.

I was expecting more but I guess that’s the downside to XPL HI’s compared to the BLF Q8

My pleasure. Good increase too. :+1:

Oh yeah, I forgot to mention those screw sizes were for the original Thorfire Q8. But they should be the same for the Sofirn Q8. I added an edit to the post above to reflect this.

I wrote ‘standard Ø2.5*4mm screws’ which means that the lenght of the thread is 4mm. A bit short IMHO. But then again: I come from the world of powerplants. Everything under M6 is focussing on not shearing off bolts.

Don’t worry, the inner threads in the body stretch far enough for a few extra mm.

Just in case anyone is interested in results using Sofirn unprotected cells, NCR18650GA’s, and 30Q’s

Stock Q8

Sofirn cells - (4730) - on / (4440) 30 - sec
GA’s - (4820) - on / (4460) 30 - sec
30Q’s - (5020) - on / (4720) 30 - sec

Bypassed Q8

Sofirn cells - (4960) - on / (4620) 30 - sec
GA’s - not yet measured
30Q’s - (5440) - on / (5030) 30 - sec

I really like this Sofirn Q8. Nice pure white beam, no ugly tint shift. Shot taken with my Galaxy S9 camera. Pitch black outside, no street lights, no moon.

@ Funtastic… Thanks for the info, good results! :+1:
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@ RobertB…. Great shot, I too love that beautiful white beam the Sofirn Q8 produces. Very nice indeed!! . :+1: . :+1:

When for a warmer version?

My “guess” is Sofirn will not offer a warmer version. The original Thorfire Q8 has that covered.

Is there anything else you’re doing to get such amazing output?

If I remember well, he is using an ULcp AR lens, which is more efficient that the stock one, along with BeCu springs bypassed, and a pure copper plate holding the springs in place.

I think he also replaced the FET with a slightly lower resistance one(not too sure though), and swapped the 18AWG power wires for 16AWG.

I looked through all his posts in the modding thread. The lens and copper spring disc didn’t do much. The spring bypass was about 1200. Brass screws about 300. These got it up to about 7000. I didn’t see a number broken out for the mcpcb wires.

The other mods he’s mentioned were XP-L2 emitters on Sinkpads and A20DP FET. That’s the parts, and there’s also the mods to the head.

Ah! The lens did actually boost the output by a nice margin. He actually gained about +/- 500 lumens from it in an XP-L2 build:

Thanks. Here’s the direct link to that comment.

Just contacted Sofirn through PM and bought another Q8 with a discount code. Code was for Amazon (US) and it was a few cents less than the group buy price.

Sofirn is actively promoting this version. You would do well to contact them directly.

Bump for Htassi.

Yes,but the Thorfire Q8 is XP-L.
I ask for an XP-L HI Warm version

I didn’t change the factory leads from the driver, they looked to be 18ga and that’s enough. I have larger, but have never used it.