Everyone here now about Swiftech stackable radaitors, right?
What is, if any, performance drop on that second rad, that will be cooled by warmed air from first rad?
Is it really huge difference between two configurations: one, with two radaitor next to each other, being cooled by same temperature air, and second one, with statcked rads, where second one will get warmed up air from first one?
It's actually pretty bad from what I've seen in reviews. So bad that adding the second radiator in the stack can actually decrease performance compared to running just one rad. Here's one fine review by Hesmelaugh, although not with the Swiftechs. I could have sworn Skinnee did something too, with the same conclusion, but I can't find it at the moment.
I actually wanted to do this with PAs.Thats strange, cause Swiftech came out with this solution for some reason, so wonder why its so bad performing...
It's actually pretty bad from what I've seen in reviews. So bad that adding the second radiator in the stack can actually decrease performance compared to running just one rad. Here's one fine review by Hesmelaugh, although not with the Swiftechs. I could have sworn Skinnee did something too, with the same conclusion, but I can't find it at the moment.
That review dont show any stack rad, only series rads, so you cant take conclusions with that
Because people that dont know how basic thermodynamics work will buy it.
You're cooling the second radiator with the exhaust from the first, reintroducing heat into your loop.
Bad idea.
That is NOT why it performs poorly!
It performs poorly because it drops airflow so significantly that even with 100% thermal efficiency the performance is capped below where a standard MCR performs. The fix is to use more fannage, whether that's increasing RPM or adding fans in series (i.e., push/pull).
Radiator performance is basically (thermal efficiency) * (airflow). So while stacking radiators increases thermal efficiency to near-100% levels, airflow is it's weak point
So this would also apply when putting a 120.4 and a 120.2 in the lower chamber of a TJ07?
Getting better temps by just putting more fans (push-pull) on a single 120.4?
Or am I missing something?
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That review dont show any stack rad, only series rads, so you cant take conclusions with that
What do you mean by this?
Quote:
Originally Posted by WeeMaan
So this would also apply when putting a 120.4 and a 120.2 in the lower chamber of a TJ07?
Getting better temps by just putting more fans (push-pull) on a single 120.4?
Or am I missing something?
That's what the results we have so far suggest, as far as I can tell.
Well, thats cool then. So I could actually put two PA120.2 in config: fan|rad|fan|rad|fan - and have pretty much same performance as having those two rads separately in same loop.
Well, lets say, 80% of performance of the second rad.. That still ok.
There's a performance drop for MCRs when using less than a single ~2000RPM fan (the slower the fan, the larger the drop, unfortunately). I know with a single San Ace with 20mm shrouds on each side of the fan, I only saw an 18% boost in performance over a single MCR.
Not sure exactly how it scales when adding fans...
Hot water goes to rear rad first, and then enters the front rad then goes back into system.
That looks pretty cool, but isn't the way the swiftech rads are meant to be stacked, which is in parallel (not sure what difference this makes, just saying). You could do it this way though.
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That looks pretty cool, but isn't the way the swiftech rads are meant to be stacked, which is in parallel (not sure what difference this makes, just saying). You could do it this way though.
no i dont believe in paying 20 extra dollars for taps on the other side.
(sorry gabe, but thats kinda outragous.)
Also im not a fan of paralell. And the san aces require shrouds.
So it worked out because if it was stacked tighter, i couldnt get my barbs inside.
Not trying to be an a**, but reviews from two independent testers both show a performance drop in some situations.
Where they running only med speed fans in the middle of the sandwich? I could see that effecting temps. IIRC, the ones i have seen have had some sort of push/pull setup.
why getting all the trouble of stacking two mcr's when you have all the option to choose a thicker rad like xspc, tc, tfc. just try to consider those thicker rads as if those were stacked mcr's then move on with your build, imho i think it is not worth all the trouble really
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I think the idea was for people who already owned a 320 to add some extra cooling and not replace the rad entirely. I am building a loop right now with stacked 320's and I am curious as to how they will perform. I am a bit nervous they wont have enough cooling power for my components. Also, I have chosen to run the Sythe S Flex 1900 rpm 75cfm fans. I wish some one made spacers/shrouds that would fist in between the fans and rads that were easy to install.
What if you ran a Y on the input and the output of the rads? It would still use the same fans but would it force the water through both rads more evenly? Of course this would defeat the purpose of the stacker version.
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as you can see MSRP is only $10 difference. maybe dealers don't discount the stackable as much as the regular, but we have no control over that. So the "outrageous" qualifier is not warranted under the circumstances.
Its not just sidewinders, its also ppc, and jab-tech.
On average the stack versions cost 20 dollars more. :\
Dont get me wrong tho gabe, the MCR320 is a great rad and i love and recommend it.
Its main best selling point was it was fairly cheap and had rock solid performance.
But having to pay 20 dollars for threads on the rear kills its value stand point.
i believe, back in the voting thread, $5 or so was for the custom short fittings. and as gabe said
Quote:
Originally Posted by gabe
as you can see MSRP is only $10 difference. maybe dealers don't discount the stackable as much as the regular, but we have no control over that. So the "outrageous" qualifier is not warranted under the circumstances.
and if my numbers are right, thats only $5 more MSRP. but then again, we don't pay that so $15. need to talk to the stores and find out why they don't discount as much, i assume lack of sales in comparison.
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Its not just sidewinders, its also ppc, and jab-tech.
On average the stack versions cost 20 dollars more. :\
Dont get me wrong tho gabe, the MCR320 is a great rad and i love and recommend it.
Its main best selling point was it was fairly cheap and had rock solid performance.
But having to pay 20 dollars for threads on the rear kills its value stand point.
as I said in my post above, this is street price.. not MSRP.
MSRP is only $10 difference.
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