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Thread: Flow rate, is it too low?

  1. #1
    I am Xtreme
    Join Date
    Aug 2016

    Question Flow rate, is it too low?


    First of all, this is not my first loop by any means, but until now I never had a real way to measure flow rate. Now I got a sensor fitted (I experienced some issues with my reservoir so I decided to install one).

    Loop is as follows:

    Koolance RP-452x2 v2 reservoir with 2x D5 vario pumps in series at max speed
    EK Supreme HF with 6th plate (the one with a fine line)
    2x EK GT980 blocks in parallel
    Alphacool 360 rad (normal width)
    EK 360 rad (double width)
    Back to reservoir.

    All is mounted with soft tubing, 19/13.

    When I was testing the resevoir and pumps alone I was able to get around 11.6 gal/min. Obviously this was with a short loop, no radiators or blocks, but I wanted to check that the reservoir configuration was fine.

    With the whole loop mounted I'm getting sometihg about 1.7 to 1.8 gal/min. To be honest I expected something more...

    Do you think this figures are ok? Maybe moving to hard tubing will help increase flow?

    Thanks guys!

  2. #2
    I am Xtreme zanzabar's Avatar
    Join Date
    Jul 2007
    SF bay area, CA
    you are supposed to run 1.2-1.5gpm so you should be fine.
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  3. #3
    Xtreme Mentor
    Join Date
    Oct 2007
    You could cut the pumps back to 50% and still have plenty of flow. Play with pump speed. When temps begin to climb you found optimum pump speed.

    Blocks cause major restriction, that's how it is.
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  4. #4
    Xtreme Member
    Join Date
    Mar 2005
    Quote Originally Posted by Ballantin View Post
    Maybe moving to hard tubing will help increase flow?
    only way it would make much difference is if there was a change in the tightness of bends maybe removing 90 fittings for a gentler hard tube bend and i doubt you have any kinks do you?
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