Yet another Yong Heng Mod

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biohazardman

biohazardman

Member
Jul 3, 2019
5,451
280
Herriman, UT United States
Always looking for things to do that I am capable of these days. I have seen several very nice and over the top Yong Heng mods as of late. So, thought I should get the parts out that I bought a couple of years back and do something with them.

Parts are a couple of 360mm radiators and three 120mm computer fans.

I had most of what I needed to do the install but was missing some 3mm metric screws and a piece of 1/16th x 1.5 inch aluminum angle. So a trip to the local hardware store was required.

I cut then drilled the angle to fit my radiator. Attached the angle where the fans go on one side of the radiator then screwed it to the big wood block I have my Yong Heng sitting on as I don't need it to be portable. I still have room for my second radiator if I decide to install it.



Installed the three 120mm fans with the long 3mm screws I got on my trip out earlier. Have a big old 12v wall wart that is sufficient for these. So I cut off the plug and wired it up to the fans but the fans did not werq ;^) Had to smile at what I did cuz I hooked the power supply up to the 5V on the fans instead of the 12v it was a color thing red is 5v Yellow is 12v when you are inside the computer. So basically it was hooked up to nothing as there were no wires on the 5v fan circuit. So after a few minutes of trying to figure it out I went ahead and moved the wires over to the 12v side, where the wires were, and to my surprise the fans powered right up.



The stock hoses to the Yong Heng were a bit too small in diameter but I still managed to stretch them out and force them over the radiator fittings. It's a tight fit but it werqs. The silicone hoses like to kink and restrict the coolant supply so I used a spring in the place I thought that would be a problem.



The parts all together.



The compressor with mods in operating mode. Fun little project it was. I will need to drain my air tank down a bit and try it with no ice to see how well the compressor werqs with it's new mod. At least I used up some of that time I usually waste on useless stuff on something that might be useful anyway. I did not do this earlier cuz it is so easy just to drop a 1/2 gal jug of ice in the bucket and not worry about overheating for the 20 minutes plus I am charging my tanks and guns. But when you get bored enough you have to do something so you do not get your brain programed by the evil stuff on the tube.



Now that I am done with all of that I went to toss the empty box, that had the radiator it, out and what do you think I found? The perfect 3mm screws for the install of the fans. ;^)

Then I noticed the fans were blowing opposite of the way I wanted them to. So, I tore the radiator off and turned it and all of the fans around as well. Now I am done. I hope. ;^)



I finally got the chance to test out the Yong Heng radiator mod.

https://www.airgunnation.com/topic/finally-got-to-test-out-the-yong-heng-mod-i-did/?referrer=1

https://www.airgunnation.com/topic/still-werqing-on-the-yong-heng/?referrer=1

Latest post and it's finished

https://www.airgunnation.com/topic/yong-heng-mods-update/?referrer=1


 
Feinwerk

I originally thought the same as you then I thought about how hot the head and pipes really get. It was then I decided that even the warmed air blowing from the radiator is going to cool the head and pipes more than they would be cooled without the fans blowing on them. The cool room air going through the radiator is better than the heated air from the compressor head and main body going through it.

If it doesn't werq well I can turn it around again and try it the other way. But I have to use it first. Since I seldom run it over twenty minutes I am going to have to keep a close watch on it to see any differences. Also I am only running 2.5 gallons of water instead of the recommended 5 gal so I could run more water if I feel the need as well.
 
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Nice, interesting innovative set up for a YH.

Might not even need the bucket of water any longer. Could probably be plenty of coolant with the radiator capacity and maybe a small reservoir/tank mounted on the side of the radiator like a 2L or 1L soda bottle just large enough to house and feed the pump. Might find less coolant will be needed using water/&water wetter only. Measuring/Reading the operating temps will tell the story of whats needed. If you have a run away heat build up, you need more coolant or better coolant heat removal...
Click to expand...

Click to expand...

Which way do you have the airflow going now? Just thinking about the thermodynamics of it, I think I would have set the fans up on the compressor side, blowing through the radiator and drawing cool room air around the compressor head as opposed to blowing heated air from the radiator onto the compressor unit.
Click to expand...

Without a shroud there will be no draw of air thru the compressor with the way things are mounted/positioned . So just blowing the warm air past it still probably helps a very little. The brunt of the cooling heat load, the upper cylinder, is done with the cooling system.. But if it had a shroud and positioned differently, then I do agree with you...
 
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ACS

Yup, I agree that nearly all of the cooling is done with the cooling system. Still it is surprising the amount of airflow coming out of these fans and onto the head but like you I don't expect it to do much. I was more concerned about running the hot air from around the compressor through the radiator rather than the cooler 65 degree basement air. To be honest though I doubt that that would make too much difference either.
 
Upvote 0
Nice, interesting innovative set up for a YH.

Might not even need the bucket of water any longer. Could probably be plenty of coolant with the radiator capacity and maybe a small reservoir/tank mounted on the side of the radiator like a 2L or 1L soda bottle just large enough to house and feed the pump. Might find less coolant will be needed using water/&water wetter only. Measuring/Reading the operating temps will tell the story of whats needed. If you have a run away heat build up, you need more coolant or better coolant heat removal...
Click to expand...

Click to expand...

Which way do you have the airflow going now? Just thinking about the thermodynamics of it, I think I would have set the fans up on the compressor side, blowing through the radiator and drawing cool room air around the compressor head as opposed to blowing heated air from the radiator onto the compressor unit.
Click to expand...

Without a shroud there will be no draw of air thru the compressor with the way things are mounted/positioned . So just blowing the warm air past it still probably helps a very little. The brunt of the cooling heat load, the upper cylinder, is done with the cooling system.. But if it had a shroud and positioned differently, then I do agree with you...
Click to expand...

I agree that the bulk of the cooling is through the liquid coolant. But I have an external fan that operates independently from the liquid coolant system and at operating temperature, turning on that external fan will drop temperature several degrees quickly and turning it off will cause indicated temp to rise again. Is it a critical amount of additional cooling? Almost certainly not as the unit can work fine without the external fan. Is it helpful? IMO, absolutely as it causes a visible drop in operating temperature.
 
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I wonder how much difference an interstage cooler would make. Anyone know what the pressure is between first and second stage is? I have been considering wrapping the transfer tubing in copper wire to see what the effect would be. It appears to me that a moisture/oil trap between stages would be beneficial to the life of the second stage valves based on the inspection of mine.
 
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Move that YH forwards some 4-5" and place a big fan in the "electric" end pushing through the unit, that will rid you of a lot of unwanted heat almost for free. A lot of electric motor heat gets transferred through next to no good circulation and actual heat transfer theough the crank case.

Free the unit of that and you're a big step closer to a better working unit.
 
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I wonder how much difference an interstage cooler would make. Anyone know what the pressure is between first and second stage is? I have been considering wrapping the transfer tubing in copper wire to see what the effect would be. It appears to me that a moisture/oil trap between stages would be beneficial to the life of the second stage valves based on the inspection of mine.
Click to expand...



I think it's around 150 but not sure. I thought the same thing. I believe motorhead wraps wet rags around the transfer pipe and said it helps a lot.
 
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Yes it does!

Knife



DSC02723.1616213559.JPG
DSC02725.1616213569.JPG

 
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My experience shows very small temperature rise in the water exiting the compressor. I haven't measured the difference but it is imperceptible to feel. SO, the air coming through my radiator is basically the surrounding room temperature and as stated above makes a noticeable difference in the stabilized operating temperature. The first stage cylinder is finned cast iron that relies on airflow for its cooling.

P3161192.1616336095.JPG
P3161198.1616336177.JPG

 
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It will give you a few more minutes like three to six, depending on the environment, before you have to shut the unit down and that is all some need to finish up a fill. I usually shut down at 60 - 65C cuz I think the manual's 75C is a bit much. Just adding the jugs of ice will do the same thing.

If you want more you will need to put a 6 or 8 inch helper fan blowing through the unit. Mine stabilized at 59 - 60C when I did that, in my 65deg F basement, and 20 minutes later it was still no higher than 61C so I guess I found my equalization temp anyway.

I'll probly never run this thing that long but good to know if I need too I can.
 
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