RBX acceleration nozzles... needed?

joseph@warfacto · 01-12-2004, 09:08 PM

hi i have an rbx and a 650 gph rio 1700, yes i know it doesnt put out that much but it does put out quite a bit... and i was wondering if i really need a nozzle in there or not... seems like id just be making a bottleneck considering im using the pump only for the waterblock. got a festiva hc and pump is submerged.

joseph@warfacto · 01-13-2004, 01:58 AM

well i took out the blank nozzle and dont have anything in there at the moment and wihth my setup my 2100xp is running 33 idle-39 load at 2.1 ghz (crappy chip ;o
does anyone know which nozzle works best with a high flow system? if so ill jsut make it using the blank they gave me

joseph@warfacto · 01-14-2004, 01:50 PM

**update**

switched cpus with a friend of mine... hes got a AIUHB 0302, compared to my crappy 0306, in a dually rig. with the new cpu i am oc'ed at 2454 stable and mbm has me at 27-28 idle and 34-35 load. this chip runs alot cooler and faster. now i jsut need to do some vmod'ing on tghis old a7n8x...
same old question though. would an acceleration nozzle really help me? btw as5 has only been on for about 12 hours, so it hasnt finished setting yet.

AntiBling · 01-14-2004, 10:44 PM

Why do you think they made the block with the nozzle inside? Do you honestly think they didnt try NOT putting in a nozzle to see what happened? Danger Den thinks it helps, or it wouldnt be in there. If it works good enough for you without the nozzle, fine. It will almost certainly work better with the nozzle in the block.

joseph@warfacto · 01-15-2004, 12:33 PM

but its jsut an accelerator nozzle... it impedes flow.... they made the waterblock for the standard watercooler's pump... 300 gph at most. at double that, is it needed?

id really appreciate the advice from a waterblock maker... i.e cathar as it seems to be modeled fairly similar to some of his designs. or bigben or someone that knows alot about this.

Cathar · 01-16-2004, 06:31 AM

The nozzles accelerate the water velocity prior to striking the base.

Even if the nozzle cuts your flow rate by 30%, the water velocity striking the base-plate will still probably be 2-3x that of what it would be without the nozzle.

When it comes to the impingement action, it's all about velocity. One can achieve better cooling with a higher velocity and a lower flow rate, than with a lower velocity and a higher flow rate.

Butcher · 01-16-2004, 07:25 AM

Also consider that the rio 1700 isn't going to be getting anything near 650 gph in any actual setup due to back pressure, and that for such a high rated pump it has a surprisingly low maximum water head. Your pump is probably about average in terms of flow for a water cooling system, so the accelerator nozzle is likely about right.

Chamelion · 01-17-2004, 04:29 AM

EDIT: My bad

joseph@warfacto · 01-17-2004, 02:27 PM

thank you cathar and everyone who posted . im going to try making a #3 or #5 accel nozzle out of the blank one i got and see if that affects performance at all.

joseph@warfacto · 01-19-2004, 11:30 PM

well with a 45 cfm fan on the festiva hc and adding more water to my hydrx/water res and alot of burn in my cpu is running 25 idle 30 load and i checked my gph by using a gallon jug and filling it up and im getting roughly 200 gph with my pump... was wondering if you could make a closed loop system by having the pump submersed and then just hooking the intake line onto the pump while having the pump, hose and hands all submersed? it seems like it should work hypothetically. im not too trusting of the asus cpu diode though, even though with my slk800 it said i was at 46 idle and its changed to 25... so im going to grab my friends digital thermometer and double check all the temps with it.

Groth · 01-20-2004, 11:00 AM

You can do a rough calibration of your diode temp readings by taking readings at several multiplier settings and graphing them (temp vs. multiplier). You should have a straight line that hits ambient temp at a theoretical 'zero multiplier'.

Got a drawing of this pump arrangement you're comtemplating?

01-12-2004, 09:08 PM	#1
joseph@warfacto Cooling Neophyte Join Date: Jan 2004 Location: saint louis Posts: 7	RBX acceleration nozzles... needed? -cathar validate my existence plz hi i have an rbx and a 650 gph rio 1700, yes i know it doesnt put out that much but it does put out quite a bit... and i was wondering if i really need a nozzle in there or not... seems like id just be making a bottleneck considering im using the pump only for the waterblock. got a festiva hc and pump is submerged. Last edited by joseph@warfacto; 01-15-2004 at 12:41 PM.

01-14-2004, 10:44 PM	#4
AntiBling Cooling Savant Join Date: Jan 2004 Location: orlando FL Posts: 147	OK, since no one else asked.... Why do you think they made the block with the nozzle inside? Do you honestly think they didnt try NOT putting in a nozzle to see what happened? Danger Den thinks it helps, or it wouldnt be in there. If it works good enough for you without the nozzle, fine. It will almost certainly work better with the nozzle in the block.

01-17-2004, 04:29 AM	#8
Chamelion Cooling Neophyte Join Date: Jan 2004 Location: Overclockers Australia! Posts: 1	EDIT: My bad Last edited by Chamelion; 01-17-2004 at 08:52 PM. Reason: I was in a bad mood, apologies.

01-17-2004, 02:27 PM	#9
joseph@warfacto Cooling Neophyte Join Date: Jan 2004 Location: saint louis Posts: 7	thank you cathar and everyone who posted . im going to try making a #3 or #5 accel nozzle out of the blank one i got and see if that affects performance at all. Last edited by joseph@warfacto; 01-18-2004 at 10:49 AM. Reason: im gonna sew your asshole shut and keep feeding you adn feeding you and feeding you...

01-13-2004, 01:58 AM	#2
joseph@warfacto Cooling Neophyte Join Date: Jan 2004 Location: saint louis Posts: 7	well i took out the blank nozzle and dont have anything in there at the moment and wihth my setup my 2100xp is running 33 idle-39 load at 2.1 ghz (crappy chip ;o does anyone know which nozzle works best with a high flow system? if so ill jsut make it using the blank they gave me

01-14-2004, 01:50 PM	#3
joseph@warfacto Cooling Neophyte Join Date: Jan 2004 Location: saint louis Posts: 7	i like talking to myself update switched cpus with a friend of mine... hes got a AIUHB 0302, compared to my crappy 0306, in a dually rig. with the new cpu i am oc'ed at 2454 stable and mbm has me at 27-28 idle and 34-35 load. this chip runs alot cooler and faster. now i jsut need to do some vmod'ing on tghis old a7n8x... same old question though. would an acceleration nozzle really help me? btw as5 has only been on for about 12 hours, so it hasnt finished setting yet.

01-15-2004, 12:33 PM	#5
joseph@warfacto Cooling Neophyte Join Date: Jan 2004 Location: saint louis Posts: 7	but its jsut an accelerator nozzle... it impedes flow.... they made the waterblock for the standard watercooler's pump... 300 gph at most. at double that, is it needed? id really appreciate the advice from a waterblock maker... i.e cathar as it seems to be modeled fairly similar to some of his designs. or bigben or someone that knows alot about this.

01-16-2004, 06:31 AM	#6
Cathar Thermophile Join Date: Sep 2002 Location: Melbourne, Australia Posts: 2,538	The nozzles accelerate the water velocity prior to striking the base. Even if the nozzle cuts your flow rate by 30%, the water velocity striking the base-plate will still probably be 2-3x that of what it would be without the nozzle. When it comes to the impingement action, it's all about velocity. One can achieve better cooling with a higher velocity and a lower flow rate, than with a lower velocity and a higher flow rate.

01-16-2004, 07:25 AM	#7
Butcher Thermophile Join Date: May 2001 Location: UK Posts: 1,064	Also consider that the rio 1700 isn't going to be getting anything near 650 gph in any actual setup due to back pressure, and that for such a high rated pump it has a surprisingly low maximum water head. Your pump is probably about average in terms of flow for a water cooling system, so the accelerator nozzle is likely about right.

01-19-2004, 11:30 PM	#10
joseph@warfacto Cooling Neophyte Join Date: Jan 2004 Location: saint louis Posts: 7	well with a 45 cfm fan on the festiva hc and adding more water to my hydrx/water res and alot of burn in my cpu is running 25 idle 30 load and i checked my gph by using a gallon jug and filling it up and im getting roughly 200 gph with my pump... was wondering if you could make a closed loop system by having the pump submersed and then just hooking the intake line onto the pump while having the pump, hose and hands all submersed? it seems like it should work hypothetically. im not too trusting of the asus cpu diode though, even though with my slk800 it said i was at 46 idle and its changed to 25... so im going to grab my friends digital thermometer and double check all the temps with it.

01-20-2004, 11:00 AM	#11
Groth Cooling Savant Join Date: Mar 2003 Location: MO Posts: 781	You can do a rough calibration of your diode temp readings by taking readings at several multiplier settings and graphing them (temp vs. multiplier). You should have a straight line that hits ambient temp at a theoretical 'zero multiplier'. Got a drawing of this pump arrangement you're comtemplating?

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