Porting heads is an art and science. It takes a craftsman’s touch to shape the surfaces of the head for the optimal flow characteristics and the best performance. Porting demands the right tools, skills, and application of knowledge. Few other engine builders have the same level of knowledge and skill porting engine heads as David Vizard. All the aspects of porting stock as well as aftermarket heads in aluminum and cast-iron constructions are covered. Vizard goes into great depth and detail on porting aftermarket heads. Starting with the basic techniques up to more advanced techniques, you are shown how to port iron and aluminum heads as well as benefits of hand and CNC porting. You are also shown how to build a high-quality flow bench at home so you can test your work and obtain professional results. Vizard shows how to optimize flow paths through the heads, past the valves, and into the combustion chamber. The book covers blending the bowls, a basic porting procedure, and also covers pocket porting, porting the intake runners, and many advanced procedures. These advanced procedures include unshrouding valves, porting a shortside turn from the floor of the port down toward the valve seat, and developing the ideal port area and angle. All of these changes combine to produce optimal flow velocity through the engine for maximum power.
For some people, driving is an art; for others, it’s a science. At the Isaac Newton School of Driving, though, every car is a laboratory on wheels and every drive an exciting journey into the world of physics. As explained by renowned science writer and physics professor Barry Parker―whose father was a car mechanic and garage owner―almost every aspect of driving involves physics. A car’s performance and handling relies on fundamental concepts such as force, momentum, and energy. Its ignition system depends on the principles of electricity and magnetism. Braking relies on friction―yet another basic scientific concept―and if the brakes fail, the resulting damage, too, can be predicted using physics.
Parker’s first lesson describes the basic physics of driving: speed and acceleration; why you get thrown forward while braking or outward while turning; and why car advertisements boast about horsepower and torque. He goes on to discuss the thermodynamics of engines, and how they can be more fuel efficient; and what friction and traction are and how they keep a car’s tires on the road, whether it’s dry, wet, or icy. He also describes how simple laws of physics enable scientists to design aerodynamic cars and high-tech steering systems. Parker then explores the high-performance physics of auto racing, outlines how traffic accidents are reconstructed by police, uses chaos theory to explain why traffic jams happen, and describes what cars of the future might look like. Whether you drive a Pacer or a Porsche, The Isaac Newton School of Driving offers better―and better-informed―driving through physics.
