[QUOTE=halftanked]Is it possible to turn 12,000? Don't bet against it. Have I ever seen one,no. But then I've never seen air either,and kind of depend on it. If I built an engine that wound that tight making usable power,I certainly wouldn't tell the spec's down at the local pub over beers. A closed mind learns little. Hank[/QUOTE

12,000 RPM isn't impossible, all the F1 cars run at least that, and many of the CART and IRL engines are bumping it.... But consistently with a flat tappet cam in a small block that still is making usable horsepower up there??? Put me on the doubters list....