2-Stager unit

[sacha35]

Thanks

Of course the lenght has to be adjusted upon the need. BTW I've checked the properties of 2 cascades that shown very good held of load (IIRC 250W+
@ about -107C). Obviously, unloaded temp and loaded one are highly correlated.

Also; this chart doesn't stand to be an 'end of all charts' you know (1st stage is so important as well even if the 1st compressor is also highly predictible knowing the 2nd one), but an approximate table gathering values one might expect to use with R1150 relativily to the 2nd stage compressor power. Assuming a linear relationship (which is pure guess), I would say the lenght is to be taken + or - 0.10m or something.

Thanks for the info mate, seeing your builds has been a big help and inspiration.

One more question is there any reason why you use 0.37/0.9mm cap tube instead of 0.31/0.8mm

[before]

Thanks so much

0.8mm doesn't look like to be suitable with 20kbtu/h+ compressors. At least that's what I guess... I've encountered a matter of very HSP with 0.8mm and the 25kbtu/h compressor used in my 3-stager 1st stage. Captube was 1.9m long, and formerly set for a 10kbtu/h. After moving for the 25kbtu/h beast, captube became a matter.

Under windows with today's tuning.

Idle : -117.8C evap (-60.3C HX out)



Just for fun; final tuning won't be that cold.

[Xeon th MG Pony]

flares are one shot, second you torque the bolt, if you unmount it you must remake the flare. Technicaly you can re-use a flare 2 more times but it should be avoided.

[before]

Sorry buddy... why are you talking about flares? Wrong thread?

[Xeon th MG Pony]

It has been a long time since I've last updated this thread...




BTW I still have a problem with flaring the oil return captube. It looks to leak a bit everytimes I unmount and then remount it. Will probably braze a simple captube here; but it pisses me off to have bought a special captube with flaring nuts and not using it.

Anyway; what you guys honestly think about these temperatures? Those are pretty cold, that's true, but can I expect less?

I'm not sure about the good functioning of the second stage CPEV... Maybe I'll remove it and braze a captube there.

Thats why I talked of flares

[before]

Oh ok... that was on January the 12th... I forgot

Thanks for your reply anyway

[Xeon th MG Pony]

Ah, that is understandable lol.I just saw this thread at the top and thought it was realitively new.

[before]

The old 1.9kW home-repaired condenser is leaking again... I've ordered a Luve 5.2kW one to be used as a replacement. Guess it'll fit much better.

[DagoDuck]

LOL, that's a huge condensor, before. I guess from cold_ice? Looking forward to it!

[piotres]

5.2 kw man You beat me with mine 3.6 kw

so what captube on 2nd stage are You using now ?

[august123]

a big condesor isn`t always good, i made this experience in my huge cascade. you may have to switch one fan off (when possible) or control fan speed.

[n00b 0f l337]

Just use a fan cut in, cut in at desired max pressure, cut out at a lower one.

[before]

Yeah that's a big one; BTW you know, first stage compressor power is 2.4kW while second one is 2.1kW...

so what captube on 2nd stage are You using now ?

3.5m of 0.9mm... Guess it's a bit small for the capacity of this compressor; but too low pressures make the compressor to be very very hot.

[before]

New condenser installed.

Tried it quickly and got -101C CPU socket temp during Spi 32M à 5.8GHz @1.81v... That's damn good. I'm gonna setup a Win XP to perform some 3D benchies.

[before]

I've played a bit with this cascade. It holds load pretty well: -112C idle, -110C Spi32M (HX @-62C).

[ryba]

Nice job!! My cascade doing similar temps.

[before]

Thx mate. Any pics of yours?

[ryba]

Thx mate. Any pics of yours?

Here you have

[sdumper]

Here you have

A 3 stage is a different beast from a 2 stage

Nice temps on the 2 stage though.

And Before:
Also Nice job

[ryba]

A 3 stage is a different beast from a 2 stage

Nice temps on the 2 stage though.

And Before:
Also Nice job

And where do you see 3 stage?

[sdumper]

And where do you see 3 stage?

LMAO your right!!!

I thought this was his gross bertha thread

[gaidin]

hehe wrong thread sdumper

[before]

lol sdumper, my Grosse Bertha is doing a bit lower temps! Based on socket temp, I'd say about 15C less at equivalent load.

Thanks guys.

Ryba, did you use captubes? If yes, what lengths?

[ryba]

lol sdumper, my Grosse Bertha is doing a bit lower temps! Based on socket temp, I'd say about 15C less at equivalent load.

Thanks guys.

Ryba, did you use captubes? If yes, what lengths?

Captubes... but I don't remember how much For sure 0.8mm

[before]

lol ok thx anyway