Copper do you recall an article that I believe was also in PM in the eighties about a car (Fiero) that Smoky Yunick built that had a "hot burn" technology? I recall him delivering his findings to GM. He was a firery kind of guy who would not stand for any corporate b.s. Because of who he was and what GM was, they soon parted ways and the engineering for a super efficient burn tech died with him. He did it with what was the 2.4 cylinder engine in the Fiero. His first obstacle was with detonation as he attempted to increase hotter and hotter temperatures for fuel burning. He over came that with valve timing devloping a camshaft with the unheard of "0*" overlap. The car produced 230hp with initial figures of close to 50 mpg as I remember.