Love digging up these old posts....
wonderful stuff for me newbie.
I'm sure you guys are over it though...

The amps reduce becasue the flow is reduced - simple as that.
Amps are roughly proportional to the square of flow = work.
Its not necessarily cavitation as to what is refered below....unless the pump is NPSH is below its spec - that's when you can exceed the liquids vap preuures and induce cavitation.

I'm curious if - all things being equal (ie: same IC, charge air cooler (obviously) and fluid mix (10 or 20% Glyco) - if increased flow has helped AIT?
My thinking is - AMG should have engineered this with sophisticated calculations to mimimise AIT = end game.
Increasing flow doesnt necessarily decrease AIT 'cause the residence time through the IC is reduced = less cooling time. I would have thoguh AMG had optimised the syste - but stranger things have happened and component deals/partnerships and business lunches/time can get in the way of r "perfect solution.
It can be calculated but I've been too busy with real client calcs to pay my bills - make money.

Also Woody - do you have a feel for presure drops through the system?
(note: CCA = Charge Air Cooler)
Pipe>pump>pipe>CCA>pipe>IC> back to the start
each has a resistance and in series they end up with the total head and flow of the pump.
I'm hearing the IC has the gratest dP, but looking for numbers.