... Any thoughts re freeze protection vs increasing the cooling system efficiency by using a lower green-to-water ratio?
Water is about 5-10% more efficient to transfer heat than glycol. Obviously the glycol is there to provide freeze and boiling protection, but the coolant is there because - in addition to glycol - it contains corrosion and microbial inhibitors.
The scale caused by not adequately combating corrosion and the problems associated with algae and other microbial growth are generally considered to more than offset any gain by not running coolant. Meaning... it doesn't help if your fluidic heat transfer is 5% better if the scale on your radiator causes the metal-to-fluid heat transfer to be 20% worse.
(above/below) mentioned the corrosion. I'm with him with the added microbial component.
So... your question should be: "What does everyone think about increasing the percentage of water to provide a net increase in heat transfer efficiency by better balancing the coolant/water ratio while maintaining adequate corrosion and microbial resistance?" I say, that's a fine idea. Go for it! You need only establish whether the 40% coolant/60% water that gives you -10F freeze point has that adequate protection. It probably does. So, again... go for it!
You can get the additives separate. Racers do it.
Diesels like to run hotter rather than cooler- helps with combustion. Around 200f is the sweet spot for the 7.3
The hotter/cooler thing is not a function of coolant ratio for a properly functioning cooling system. That would be thermostat choice.
That said... per the above, I agree with your response.
2004 F550 CC Lariat
BPD oil cooler relocation and upgraded EGR cooler (spooled), BPD oil bypass filtration, aFe Magnum Force CAI, Mishi radiator, 7.3L fan clutch, EC1 ELC, XDP coolant bypass filtration, '08 trans pan/filter, PTP direct clutch solenoid, blue spring, 6.4 starter, MBRP y-pipe, BD boots/clamps, '05 intake elbow, ccv reroute, Torque Pro + OBDLink™ LX, Autometer EGT
Last edited by djmaguire; 08-22-2018 at 05:08 AM.
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