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President's Message

The Heart of Us

I’m a gearhead. I enjoy planning, building, breaking and fixing things that burn fossil fuel and make lots of noise. If something achieves spectacular failure, the parts earn a place on the “wall of breakage” in my shop. There are valves, pistons, connecting rods and fragments of engine blocks on that wall. There will be more. I’ve competed in drag racing and truck pulling, and have also been published (as have both of my boys) in the “worst stucks” section of an off-road magazine.

The picture with this month’s message is my latest 350 Chevy, running on the dynomometer last December. Engines are basically an air pump. The more air:fuel mixture we can move through them, the more power they make. Once you’ve selected the cylinder heads and combined pistons and combustion chamber size to determine the compression ratio, the entire character of a normally aspirated gas engine is determined by the camshaft. If you select duration, overlap, and lift which move the torque curve higher for more horsepower (HP = torque X RPM), then you also move peak efficiency higher, making the engine less efficient at normal operating speeds in daily driving. I chose a moderate cam which kept the torque curve low, and still made 355 horsepower and 400 lb. ft. of torque, all in a very usable RPM range. I basically defined the nature of driving the restored 1968 M715 military truck by selecting the cam, by defining the heart – the central character of the drivetrain.

Mission Statement

The American Association of Bovine Practitioners is an international association of veterinarians serving society as leaders in cattle health, welfare and productivity.

 

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