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...agreed, not a co$t-effective replacement today, but when electric water pumps eventually become more common, under ECU control, it would certainly be more energy efficient to modulate total flow and use energy pumping coolant around only when you really have to.
...instead of "pumping" all the time and then apply "throttling" on top of that.
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• 2011 Chevrolet Cruze LTZ 1.4LT 6A
• 2009 Pontiac Vibe 1.8L/SFI 4A
• 2004 Pontiac Vibe 1.8L/MFI 4A
• 2003 Ford Focus ZX5 2.0L/Zetec 4A
• 1971 Dodge Charger 318 3A
• 1970½ Plymouth AAR 'Cuda 340/6BBL 4M
• 1968 Dodge Charger 383 3A
• 1967 Plymouth Barracuda Formula S 383 4M
• 1965 Plymouth Barracuda Formula S 273 4M
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