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Old 01-02-2021, 06:54 PM   #333
Voodoo Rufus
Scooby Newbie
 
Member#: 151528
Join Date: Jun 2007
Chapter/Region: BAIC
Location: Bakersfield, CA
Vehicle:
2015 STI Launch Edn.
WRB!

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Granted intercoolers don't have high liquid pressure drops, but the max head on the Davies Craig is ~12psi, and the Johnson pump is losing a lot of flow at .4bar (6 psi). The Johnson pump is a brushed motor as well. You do want the highest flow rate possible, but you need to consider the "dyno curve" of the water pumps to estimate how much flow you will get when you put them under load of the intercoolers, tubing runs and fittings.
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