Flow throttling ?

[K2]

This is my first post, so please be gentle :-)

What kind of valves are suitable for throttling your water flow?. I a looking to find the sweet spot for my system, currently the flow is 8,5L/min (pump rated at 20 L/min). Low resistance in the open position is important.

I tried to regulate the supplied voltage to my Eheim 1250 with a standard 220V regulator, without success. The pump did not start at all below ~180V, and the flow was almost the same between 180-220V.

[Toysrme]

Don't do that. The more the better, just so long as you aint blowning everything apart!
Welcome to the forums btw!

-Toysrme

[NeoMoses]

If you take a look at some of BillA's testing, you will see that all waterblocks perform better at higher flowrates. Finding "The sweet spot" in terms of flowrate is a myth.

[K2]

I knew waterblocks always perform better at higher flowrates, but not radiators. I have never seen any testing with different flowrates for systems, maybe you have ?.
Part of the reason for throttling was also to satisfy my curiosity, to see how much impact it would have on performance.

[Toysrme]

If you're useing a Heater Core matrix type for a radiator, they are designed to ave as high a flow rate as possible. The more the merrier I still say. It's the same as having a high speed fan...

If you can stand the noise, then the more flow yo have, the better. So long as the hoses you choose to use stay attached and you don't split your water block into pieces.

-Toysrme

[SkiFletch]

it is true that some heatercores have sweet spots, but not many. if you want such a restrictor valve, just go to home depot and get a ball valve. they're basically a large ball with a hole in the center thats rotated sideways to restrict flow. quite a wide open channel. just go in and ask for ball valves

[JFettig]

gonefishin has some massive flow thru his, He seems to have good temps, Im sure its not really noticeable...
how much does the car actually put thru it?

[K2]

Hmm, maybe i will try a ball valve and see what happens. There must be someone else who has tried this before ?.
Thanks for the input !.

[UnLoadeD]

If you are gonna do this, be sure the valve you get is "full port" or FPT. If you don't the valve will be throttling in the wide open position and you might not be able to get your "sweet spot". BTW I predict your sweet spot is gonna be with the valve all the open 8P~

peace.
unloaded

[Albigger]

check out some of the articles of BillA at the home page. he's done some testing and i think there's an article with radiators in it with different flow rates.......

[I.M.O.G.]

thats a definite negative on the sweet spot. a heatercores main objective is to get as hot as possible to disperse heat at maximum efficiency. whats that i hear? "thanks captain obvious" umm, yes, your welcome... anyways, in order to disperse heat at maximum efficiency the maximum amount of heat needs to be applied to the heat exchanger. the source of heat is the water you have flowing through the heatercore, so reducing flow reduces the amount of constant heat supplied, which reduces heatercore efficiency... which = thats a negative on the sweet spot. basic heat transfer rules apply to heatercores.

thats ignoring the amount of heat the lower flow rate would not remove from the waterblock as quickly too, which further adds to a decrease in efficiency.

and welcome to the forums my friend, glad to have you! :)

[K2]

OK, maybe this wasn't one of my better ideas. Thank you all, for taking your time to explain it.
It think i'll stick with my current setup, no need to introduce another potential leak, if there's nothing gained anyway.

[Bigg]

u could make a bypass that went from the output of the pump to the input of the pump, with ys in the mainline. then just open the valves on the bypass, and u have less flowrate. close them, and all of ur water is going the right direction

[Bigg]

btw, u could use a swifty fill and bleed kit on the bypass. wouldn't need 1/2" on the bypass (if u use 1/2")

[Intrepid]

This is al lvery interesting, as my heatercore comes from an old 76 BMW and has a flow controll mechanisim on it, it was prolly used to controll how much heat the thinng would produce.

[Bigg]

more

[Bigg]

to hit the sweet spot w/ ur rad and wb, u could run a 3/4" rad and a 3/8" wb, on a 1/2 circuit.

[K2]

Intrepid6546: Have you tried regulating flow ?. What were your temps ?.
Bigg: Thanks for the suggestions, but i think i am to lazy to try it out, when it most likely that there is nothing gained.