Modded MCP350 Results

[bobmanfoo]

Just got done modding my mcp350 with a 1/2" barb and 1/2" ID tubing from pump inlet to HC outlet

idle temps dropped from 26C to 24C on the cpu and 33C to 30C on the GPU, this is with fresh as5 too so temps should drop 1-2C more after curing, i haven't had a chance to test load temps yet but i expect there will be a similar decrease in temps, this is a must-do mod imho

[nikhsub1]

Shame you didnt leave all else alone and just mod the pump as your results are meaningless now that you remounted the WB's. I know it performs better, but not 4c.

[bobmanfoo]

Shame you didnt leave all else alone and just mod the pump as your results are meaningless now that you remounted the WB's. I know it performs better, but not 4c.

i would have left everything alone if i could but there was no way to drain the loop without removing the blocks, i was suprised to see 4C drop too but now ill never know for sure :shrug: either way im very happy with the results

[nikhsub1]

Nice job though BTW! Is that an eheim barb you used? Did you make a worklog of the mod?

[thegreek]

Nice job with the pump... I am hoping someone release's some aftermarket tops for the rest of us.

[Acurax]

Nicely done! Looks great.

[bobmanfoo]

Nice job though BTW! Is that an eheim barb you used? Did you make a worklog of the mod?
its not an ehiem barb, it was a 1/2" barb to 3/8" barb reducer from jabtech, i originally planned on using the 3/8" barb until i saw how much bigger the ID of the 1/2" was

worklog? sorry but whats that? the mod was pretty much straight foward, i used a bit that was the same size as the existing inlet tapped a hole there so it would be center, then i moved up to the next size bit until i got to the 1/2". i then dremeled the top so the barb neck would be flush with the pump, then cut the barb down so it would be flush with the underside of the top, then epoxied it together

BTW, i reallized that i loaded the wrong profile in bios after i put my rig back together, it was at 2.5ghz @ 1.48v instead of 2.65ghz @ 1.57v :shrug: idle cpu temps are 24C now which translates to a 2C drop

[XeonStrikeForce]

I just got one yesterday and it is SILENT :D

[Senater_Cache]

why did you remove the old intake barb? Couldnt you just have plugged it up somehow, and thus be able to revert the mod by sealing the new intake hole or barb....
Nice job though....one of the nicest looking barb-jobs I have seen so far.

SenC.

[zip22]

why did you remove the old intake barb? Couldnt you just have plugged it up somehow, and thus be able to revert the mod by sealing the new intake hole or barb....

nope, in order to create the larger center inlet, you have to drill through the old inlet barb. before (if the pump was standing up straight) the water came in to the top and then went 90 degrees into the center like an 'L' in order to make it straigh in ('-'), the old L has to be drilled out.

[bobmanfoo]

thanks for the replies guys
yeah it would be impossible to revert back to stock, well maybe not impossible but it wouldn't be worth it, i cut off the barb so i could access the outlet barb easier
this pump is silent though and very well built inside and out, im thinking of getting another and have a seperate loops for the cpu and gpu one since they are so small

[Senater_Cache]

ohh, gotcha....

[Fighter2a]

I'm Impressed. If only draining my system wasn't such a pain.

[bobmanfoo]

I'm Impressed. If only draining my system wasn't such a pain.
LOL, i know what you mean, thats why it took me so long to do the mod, i've had the parts ever since i bought the pump about a month ago but was to lazy to re-bleed

[itchy5]

very nice mod, looks clean, and great results. i would do that mod in a heart beat but ill stick with the new D4 ;)

[kbtat2]

I just did the mod to my pump and I can confirm a 2 degree c drop. I'm not sure if it was worth it but maybe once I add my vga block to the loop it might pay off more with the higher flow. I also noticed that the pump rpm's went up about 400 rpm's, so the flow rate is definitely higher plus I can hear the water splashing around in the reservoir now and I couldn't before.

[bobmanfoo]

nice, but the water splashing around the rad means you haven't fully bled your system
I just did the mod to my pump and I can confirm a 2 degree c drop. I'm not sure if it was worth it but maybe once I add my vga block to the loop it might pay off more with the higher flow. I also noticed that the pump rpm's went up about 400 rpm's, so the flow rate is definitely higher plus I can hear the water splashing around in the reservoir now and I couldn't before.

[AlanD911]

i was wondering what size of tubing do you use after this mod? do you use 1/2" tubing or 3/8" tubing? Since the inlet is 1/2" and the outlet is 3/8" what do you do?

[Acurax]

Whichever you want with good clamps :)

[bobmanfoo]

i have all 3/8" bards in my loop, i still use 3/8" ID tubing everywhere except from the raditator to the pump where i use 1/2" ID, the purpose of this mod is to increase inlet flow

[AlanD911]

Can you give me a link to an online vendor that has the fitting that you used for this mod? I want to do the same mod but I can't seem to find an online vendor that ships to Canada that has that same fitting/barb. Also preferable they would also be able to ship 3/8" and 1/2" tubing of clearflex 60

[kbtat2]

I got my fitting here- http://www.sidewindercomputers.com/1stto3tuid.html

[outhouse]

i did the mod used a 3/8id inlet since i have no 1/2" tubing and with just having 1bix i didnt see much but the temps in my house were jumping way too much with spring into summer

[JasonDTM]

Lookin good Bob, The Neo2 you sold me back in March I think it was is getting ready for watercooling.

[bobmanfoo]

cool, what components you getting?

[mysterfix]

You can still use all 1/2" tubing, just cut a piece of 3/8" by 1/2" tubing to fit over the outlet and slide your 1/2" tubing over that and clamp it. I have all 12/" tubing in my rig after doing this mod. I have some pictures of the old and new case in this thread (http://www.ocforums.com/showthread.php?t=395492).

[AlanD911]

How did you disassemble the pump for the modification though?

[mysterfix]

On the bottom of the pump there is 4 screws.

[Luie]

Hello,
Congrats on the awesome mod.
I'm interested into getting this pump and mod it so having the best worlds of both quietness and good performance is possible; where I'm currently debating between this MCP350 or the MCP655 (aka. D5)

Would you kindly do some intensive stress (ex. folding@home at 100%) on the CPU to test the load temperature?
I'm very interested at the difference at load temperature because to me, this is what might affect overclocking results. :-P

[bobmanfoo]

the temp drop isn't going to be enough for a better OC, a couple of C drop could be expected

[outhouse]

the only way youll see 2 C is if flow rate is the weak point in your system, most of us would not see 2C by adding another pump.

every system is different and this mod only helps a few, i did it and it fits my rig better but very little in temp help.