[elhigh]

Almost but not exactly 20%. That would be too easy.

Interestingly, there are 20 Imperial ounces in an Imperial pint instead of the American 16 ounces. That mostly makes up for the difference between the two volumes, but it must be said, the Imperial ounce is just a teeny bit different.

I meant to ask this question several pages ago: what are the various constituents of gasoline? What are their vaporization temperatures?

Smokey Yunick played pretty hard with heating the intake charge via his so-called "homogenizer" (a turbo charger serving mostly in the function of check valve to keep the heated, expanding fuel-air charge from backwashing back out through the induction system), feeding the fuel-air charge at over 400 degrees into the engine.

It seems to me that his efficiency improvements came mostly through reducing the heat losses of the engine rather than anything to do with the fuel-air charge, though it has to be said that at 400+ the charge was well and truly vaporized.

Ugh. Smokey. Popular Science had a serious crush on that guy for a long time. Still, I'd like to get my hands on those engines or, barring that, roll my own.

All it takes is time and money. So I guess that's going onto the back burner.