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Someone asked me 'why' dual pumps or installing a greater flowing pump. For me, it was to have more coolant flow though the intercooler (not just the hx). Because we're limited to the size of the intercooler brick, we can 'trick' the system into thinking it has a larger intercooler by increasing the flow though the intercooler brick. This 'simulates' a larger brick by moving more coolant in the same amount of time -- as if there was a larger intercooler brick for the 'stock' flow. Since I added between 20% to 25% more flow, it aids in cooling the charged air
In order to cool the air 'longer', adding more capacity/hx would be needed as eventually, that flow would reach its 'apex' in cooling efficiency the longer I'm in boost.
So, I'll probably install the stock HX as an addition to give me 'both', just to see if the temps are tamed longer...
-Don
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