Water Cooled Flashlight Modding a MT35 PLUS RE-MODDED

SKV89 · 2019-12-30T01:34:02.000Z

Wow GJ! looking forward to hearing its performance!

Yokiamy · 2019-12-30T06:47:56.000Z

Nice !

pinkpanda3310 · 2020-01-02T12:43:32.000Z

Cool!! (pun…?). Awesome project CNCman. Interested to see how much difference your mod has made (with regard to thermal abilities of course).

CNCman · 2021-03-14T14:35:55.000Z

Still getting things ready for some testing on the light and making a Lumen tube to check it also.
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I was not sure how the driver would handle long run times so we decided to add a copper heat sink to the rear of the driver with Artic MX-4. There is 3mil tape in the area of a possible short.

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The light was coming on when the battery tube touched the spring and not when seated. So we turned the outside diameter and taped it.
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CNCman · 2020-09-06T01:51:01.000Z

Finished compact battery holder.

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Just under 8 amps @ 12 volts. Guessing around 8500K lumens, not able to get accurate readings yet.

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8 inch lumen tube is not calibrated yet, guessing it’s reading high 2K.

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Re-plumbing with good tubing.

Beam shots don’t really show how nice it shines.

low ramp start.

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25010 lux at 6.46 meters is 1,043,707 CD and 2043 meters throw, approx 8500 lumens.
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This light just blew a mcpcb 1 day after I changed a burnt XHP70.2. I will fix it again with another modded mcpcb.
Texas Ace has a Luminus 90.2 kit ordered I will probably put in, but that will require more invasive work, so I may put that kit in another big light.
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I know this light looks strange, but it is an experiment in heat control. If were possible to find a very small pump, it would be possible to incorporate the cooling into the head ( no exterior tubing ), and improve its appearance.
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originally MATEMINCO MT35 PLUS, XHP35 HI, 4 x 18650 batteries
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I want to Thank the many BLF members who helped me during this mod.

Tally-ho · 2020-09-06T17:58:44.000Z

The water-block is genius, so how about taking advantage of the length of the battery tube for cooling the water temperature ?
Something like a battery tube with milled fins on the whole length and the water pipe going through the fins. Sorry for the 4 years old kid drawing

CNCman · 2020-09-06T12:39:48.000Z

I never thought of going around the battery tube and adding a handle, Good Idea
Definitely looks better too Yes, that is the way to do it, wish I had thought of that in the beginning

grin · 2020-09-06T13:03:14.000Z

I couldnt think of a good way to do build water blocks but your builds have given me some good ideas to work with.

kennybobby · 2020-09-06T14:57:42.000Z

The_Fat_Controller:

Well, when they show a wavien collar…
You can see there he has picked a lens with a monstrous 100mm+ FL to make the effect as dramatic as possible.

Thank you for post #44 that very informative vide and your beamshot, quite impressive.

CNCman · 2021-03-14T13:26:13.000Z

grin:

I couldnt think of a good way to do build water blocks but your builds have given me some good ideas to work with.

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This one is much cheaper and easier to make.

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grin · 2020-09-06T17:32:08.000Z

They are both well done.
I am thinking the copper tube with a web soldered between them so it is similar cross section to an I beam would be rigid enough to take the place of a spider.

CNCman · 2020-09-06T21:35:53.000Z

grin:

They are both well done.
I am thinking the copper tube with a web soldered between them so it is similar cross section to an I beam would be rigid enough to take the place of a spider.

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Mine are overkill in size, you can go much smaller because the water will take the heat away, just make sure the pump is on before the led.
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I’m searching for a front mirror coating also, found this one for glass, it might work on aluminum. Just need to learn the process, not buy the kit, its expensive.
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angelgilding.com

Pump Spray Silver Kit

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MascaratumB · 2020-09-06T23:05:14.000Z

This is a great build :o

Well done CNCman

grin · 2020-09-07T02:05:33.000Z

Sorry wrong thread

CNCman · 2020-09-07T01:06:18.000Z

Thanks for the comments BLF’rs
Sorry it took so long to finish.

Sirstinky · 2020-09-07T02:18:04.000Z

Awesome project. I wish I had a lathe and mill to do all that you do. 8500lm is nothing to scoff at for sure.

lumenzilla · 2020-09-07T04:47:35.000Z

If the water pipe is transparent, I’d like to see it with fluorescence and UV light to “ignite” it

CNCman · 2021-04-04T20:06:40.000Z

After burning a few mcpcbs and leds it was time to correct some misjudgments in function and appearance.
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The 20mm mcpcb was upgraded to a 32mm and the 20mm pocket was filled with a copper coupon and soldered in place. Then re-surfaced, drilled and tapped for mounting screws.
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A new centering ring had to be machined and fitted in place with a dremel tool. Very difficult to get it right, took 3 attempts.
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Relocated the aluminum cooling coil and resized it with the correct amount of cooling capacity, previously overkill.
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Machined a battery tube adapter to combine two short tubes.
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Rewired everything with shorter wires.
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Didi-Key XHP 70.2 5700K dedomed led.

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The centering ring was very challenging to machine.

The wires had to be held down while soldered.

Side view showing inlet and exhaust tubes.

Ready for installation.

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FINISED

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Left XHP 70.2 …… Right Luminus SBT 90.2.

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The led was from Digi-Key at XHP 70.2 5700K before dedoming.
The driver is 12v 8amp from Lexel with 5v power supply for pump.
Runs cool and only gets warm in warm weather.
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The dedomed Digi-Key XHP 70.2 5700K performed much better than the 6500K dedomed Mtn. Electronics led.
12V 8Amps on turbo
1.372,969cd
9,200lm
2,343m throw
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Specs for Luminus SBT 90.2 not water cooled.
3V 22 amps on turbo
1,829,513cd
5800 lumens
2700 meter throw

MT35 Plus with SBT90.2 mod ( GT90 kit from Texas Ace ) Flashlight Modding and DIY Parts

Hi all I purchased this kit from Texas Ace last yr with the intent of buying a used GT with the original xhp35 led. Well that idea was a bust, nobody was selling that GT and the new ones were out of my price range. So after 3 months I gave up and ordered a new Mateminco MT35 Plus instead. So from start to finish we go. . Here is the original being disassembled. [image] [image] [image] [image] [image] [image] [image] [image] . The kit is in the lower area, 2 x battery …

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It is hard to beat the XHP 70.2 when driven hard.
A lot has been promoted about the SBT 90.2, but the proof is in the beam shots.
When standing behind the two lights, I give the 70.2 my vote.
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Enderman · 2021-02-01T01:11:14.000Z

Very nice job on the MCPCB modifications
Great performance results.

CNCman · 2021-02-02T00:46:16.000Z

Thanks Enderman.
I have watched several of your builds and they inspired me to try new things.
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