R507 modded MachI

[Charles Wirth]

Ive been running for over a week now and I have been monitoring compressor temp and the overall system.

I did not extend the cap tube, just a straight charge of R507 and some tuning.

I had to reset the alarm temp to -65c

I can reach 4.2Ghz on stock voltage and boot into windows. I might be able to reach 4.3Ghz on stock voltage.

Less than stock voltage @ 4Ghz running PCMark.
http://fugger.netfirms.com/4stock.jpg

Running 3D my MachI display will warm up to -51c

My compressor maxes around 115c so I know enough refridgerant is getting back to the compressor.

No start problems at all and no popping oil.

My only problem is my display reads Er0 from one minute after I turn the unit on till I turn it off.

This by far beats 134a badly.

Benchmarks this weekend

[Ragnarok]

!!!

I wonder how long it will last!!!!

[lallend]

Wow, Great temps Fugger!!

I guess my hotass AMD isn't gonna be so nice to me.

Currently, the evap is -39c at 2.1 volts Vcore (at idle) and MBM reports the CPU is +9c

Maybe time for some tuning eh?

[DarKcyde]

Fugger: noice!

That display problem annoys me. Has anyone ever pulled that display apart to see if there's something we cant mod in there to fix that? I think I recall bowman saying somewhere that its hardcoded to freak out at -50C, no matter what you set the alarms to. With all the refridgeration expertise around here.... what we need now is an electronics monkey to design us a better controller.

Lallend: is yours R404a? Mine ran about -23C w/ 2.1 Vcore, stock R134a

[lallend]

Originally posted by DarKcyde
Lallend: is yours R404a? Mine ran about -23C w/ 2.1 Vcore, stock R134a

No, its with R507 and no cap tube mod as suggested by Fuggers A/C tech friend (who knows alot about A/C, thats for sure)

So far, at stock Vcore, the coldest the evap has gotten to is -46c (unloaded).

Loaded, it drops well into the -30's and according to MBM the cpu temps are +15c to +25c depending on the overclock

What were your reported CPU temps? I know, take it with a grain of salt.....

[Charles Wirth]

Larry bring it back by and we can tune it much better now, I think I can squeeze -10c more out of it.

[lallend]

Sounds good Charles! Hehe, one thing though, this prommy stuff is cool (pun intended!)

[Marci]

Might be worth stickin a guide up fer 507'in yer prommi Fugger-d00d!

Weight or Pressure amounts would be handy as it appears to be much more straightforward than the 404 mod... specially if no tubing mods are required...

Also, how would it apply to a Mk II? Any ideas?

[DoGMaN]

Wow great work FUGGER!! I Agree with Marci. I would love a little guide as to how much 507 and how exactly you tuned it so well. I'm kind of surprised that the little prom mach I compressor can handle 507, but that is great news!!!

[Gary Lloyd]

I am seeing prommie evap temps all over the map, and many of the temps reported are just not possible. The prommie obviously has serious problems with sensor calibration.

This wouldn't be a big deal, but they are controlling fan speed, reset, alarms, and who knows what else, all based on a false temperature. I think it's a problem.

The more I learn about the prommie control system, and it's evap sensor in particular, the less I like it.

[JCviggen]

Originally posted by Gary Lloyd
I am seeing prommie evap temps all over the map, and many of the temps reported are just not possible. The prommie obviously has serious problems with sensor calibration.

The early Mach II units tended to report too low temps... but the latest ones shouldnt have that problem anymore. I think the Mach 1 sensors should all be within 1-2C of each other.

[bowman1964]

well the only way i have been able to stop the err code is adjust the temp readout with a vr resistor accoss the temp sensor wires.but the only way to do it is use a trusted meter,fluke or simpson.and measure the evap temp directly.then throw it off by 10c with the resistor.that stops it.but it will read 10c warmer temps.
i have seen the guide to reprograming the unit.but i have dealt with carrel on this and the control was not designed to be used below -40c with the thermistor they are using.it becomes way off at cold temps anways.
all the reported cold temps below -50 or so are not right.the thermistor starts to act flakey after -50 or so i have found.put a ohm meter on the wires and watch.it will just start to spike back and forth when it is real cold.
a thermistor was never designed to be used for those cold of temps.
the only way you will know how cold it really runs is with a good fluke meter set to use a j type or t type thermocoupling.
i like the t type better.i have soom that are .005 in diameter,they will slide under the head and read true temps.
the carrel unit works great in the temps around -40 so i have found but when it gets close to -50 it starts its strange business,but i have seen one or 2 that were closer than others.

without a real meter checking the temps,that was designed for low temps you can never no what it is really doing.

[bowman1964]

i have the excate specs somewhere on the carel unit.i will find the link to the specs and post them for everyone.just dont let me forget.it would help for eveyone to see what they were spec to.

[isp]

Nice Fugger. I haven't heard of R507 until now...

[Gary Lloyd]

Since the refrigerant cools the evap, the refrigerant temperature must be lower than the evap temperature. If the gauges indicate a higher temperature than the evap sensor, then one of them is wrong.

the only way you will know how cold it really runs is with a good fluke meter set to use a j type or t type thermocoupling.

I have used Flukes for many years. Wouldn't have anything else.

[baker18]

I agree with Gary. I would put a good thermometer on it and take an accurate temp reading and compare it with the prommie. Probably 10c to 15c difference.

baker18

[Marci]

i will find the link to the specs and post them for everyone

Which specs? I have the full manual link at home...

This is a shrunk down version providing a summary of parameters... http://www.tempatron.co.uk/manuals/IR32Manual.PDF

[Charles Wirth]

When my unit goes past -52c the fans will turn on full speed. I think this is a good thing like a turbo boost. The fans are not loud so it is not a problem for me.

[bowman1964]

fugger you have a fine thread going here,and you should be proud whatever the temps work out to be..



but as i think everyone always gets back to the subject of the prometia temps reading being off.and i do not want to get into a discussion in here on the controller.but i think we need a place to discuss this and other things like thermo dynamics,heat transfer and other phace change topics.WITHOUT thread crapping.LOL

so i am going to open up a thread for open discussions on all phase change(refrigerantion based ideas) as well as prometia threoys.

again fugger great going...good luck.and we can discuss the prometia controller in the other thread
heavy discussion

[Charles Wirth]

Unstable screen shot, but...

Running 3D in a bit, got a few new cards to mod

Even with the newest bios my IC7 errors out at -25c and doesnt change. So I know my CPU is colder that -25c at idle at full speed.

MachI will drop from er0 to -49c on the display at the end of nature in 2k3 run.

I took down a #1 spot, a min ago

http://service.futuremark.com/compare?2k3=1381332

[TodB]

Bowman, can you comment the impact of the R507 over the Mach compressor?

Cuz despite the wrong temps it's really important ( for me at least ) to know if the NL11F ( If I'm correct ) will sustain the "load" from the R507?

[DoGMaN]

From my very limited knowledge, 507 acts very similar to 404a. The max high and low side pressures for 507 are slightly higher than 404a so it will have more of an impact on the life of the compressor, but how long is anyone's guess. I chose to use R502 instead of 404a or 507 due to slightly lower pressure ratings. It is a pretty small difference, but so is the difference in boiling point (<1C). R502 also has less glide than R404a and most likely R507 as well.

[Charles Wirth]

cooling more stuffs now, unstable at screen shot speed.

[Charles Wirth]

Shooting for 4.7Ghz screenie atm...

Then back to business

[Charles Wirth]