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Originally Posted by MagicRat
As far as I know, one way is to raise the operating temperature of an engine, without melting the pistons, rings or cylinder walls. My guess is that no commercially-viable major tech breakthrough has been made in this field.
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Yep, raising the temp of the engine is good for efficiency, but not quite as good for power of course. The only viable step in this direction that I've found is Evans NPG coolant. NPG in thier case stands for non-aqueous propylene glycol. since cooling systems don't rely on the actual temperature of the water, they rely on the ability for it to transfer heat out, the actual temperature of the engine can be higher than we currently run. Since the Evans coolant doesn't get mixed with water it can't boil (well, not until something like 380 degrees). I think regular oil starts losing its life around 260 degrees, and synthetic somewhere around 280. The caddy 500 in my Bonneville runs Evans and I keep it running around 250. Detonation isn't a problem since there is no nucleate boiling to allow chamber temps to spike. It works well so far on 10w40
I wouldn't call Evans coolant a major viable breakthrough, but its at least a step in the right direction. Until then, I'll just run a turbo
