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Old 09-03-2013, 01:43 PM   #1
PeaceOnesxWai
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SR20 Radiator Flow Rate??

Anyone know the flow rate per minute or per hour for the radiator fluid?

Trying to get some fittings done with the radiator hoses and need to know the flow rate before I purchase.
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Old 09-03-2013, 10:36 PM   #2
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Flow rate? Why would you need to know that for hose fittings?
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Old 09-03-2013, 11:00 PM   #3
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Old 09-03-2013, 11:46 PM   #4
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^I have -16AN currently on my SR but im switching the fittings to dry disconnect fittings. They are more restricted so i need to know the flow rate to know what fitting size I should use. The bigger the size, the more it costs. If I get too small, i restrict water flow.

Also -16 is the minimal AN size the radiator hose should run. AN -20 would almost match the OEM size.
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Old 09-04-2013, 12:05 AM   #5
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I would measure the ID of the original rad hoses, then find and use the -AN fittings with the closest ID.
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Old 09-04-2013, 05:57 AM   #6
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"Flow rate" is meaningless without knowing the pump curve of the stock water pump. It's all a question of what pressure drop can you tolerate at a given flow rate.

I've done pressure drop tests on many quick disconnect fittings, and my gut feeling without exactly knowing the pump curve is you will need to be running a roughly -20 sized QD that's fairly low restriction to even have a hope of it working.


That said - why QDs on your radiator? Why not just wiggins clamps?
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Old 09-04-2013, 01:13 PM   #7
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Because racecar lol

Wiggins look cool but Quick disconnects allow for fast fix without the lose of liquids.
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Old 09-04-2013, 04:52 PM   #8
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Those fittings are going to get more popular as times goes on. They're brilliant.

Hit up Nigel @ engineeredtoslide.com - he used those fittings and might have some info for you. He probably fields tons of questions like that though.
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