High-Performance Cams & Valvetrains: Theory, Technology, and Selection Manual

Description: Product Details192 Pages457 Photos & IllustrationsPaperbackColourPublished in 2022Part of the S-A Design CarTech SeriesHigh-Performance Cams & Valvetrains: Theory, Technology, and Selection By Billy Godbold Understand the "magic" of how optimized camshafts extract the most performance from every engine component, eliminating valvetrain guesswork. Camshafts are the coach and conductor of any four-stroke engine from early flatheads to modern Formula 1. Performance engines are amazingly sensitive to how and when the valves to the combustion chamber open and close. The valvetrain configuration and flow characteristics may change significantly between applications, but the fundamental principles are universal. This allows the language, setup, dynamics, energy, and pressure aspects of a valvetrain to be covered in a way that is just as useful for optimizing a sub-15-hp go-kart engine as it is on a 500-plus-hp street engine or modern 1,500-plus-hp NHRA Pro Stock engine. In High-Performance Cams & Valvetrains: Theory, Technology, and Selection, farm kid-turned-physicist Billy Godbold combines his quarter-century of experience with valvetrains at Comp Cams, Lunati, Crane Cams, and Edelbrock along with the techniques he uses with professional teams in NASCAR, NHRA, road racing, dirt track racing, offshore racing, and land speed racing, guiding you to think about any valvetrain system with his perspective. Often lighthearted and filled with analogies, this book endeavors to make complex concepts easy to understand without ever watering down important details. Specific configurations and applications are covered, providing techniques and examples for optimizing camshafts and the valvetrain around intakes, headers, superchargers, turbochargers, fuels, carburetors, and modern EFI applications. If you are planning or building a classic hot rod (Chevy, Ford, Chrysler, etc.), modern performance (LS, Hemi, Coyote, or Godzilla), or competition engine (road racing, circle track racing, or drag racing), these practical details show you how any valvetrain system should be modified to extract the most from every component and help you achieve your unique goals.Table of Contents Chapter 1: The Language of Camshafts What is a Camshaft? Basic Terms Cam Degrees versus Crank Degrees Intensity Specification Cards, Comp Adcole Reports, and Published Lobe Data More on the Specifications Card Adcole Inspection Report Chapter 2: Valvetrain Blueprinting Setting Rocker Height Setting Lash or Preload Calculating Optimal Spring Setup Height Degreeing a Camshaft Piston-to-Valve Clearance Advanced Blueprinting Specific Stiffness Chapter 3: A Dynamic Understanding of Profiles: Velocity, Acceleration, and Jerk Velocity Acceleration Jerk Closing Loads Past the Buckling Point Chapter 4: Energy and Four-Stroke Engine Fundamentals Follow the Energy What is Horsepower? BSFC and Efficiency The Otto Cycle Volumetric Efficiency Chapter 5: Under Pressure Measured and Theoretical Otto Pressure versus Crank Angle PV Diagrams Chapter 6: Understanding Valve Events EVO Overlap IVC Chapter 7: Wave Tuning Starting at EVO Optimizing Intake Port Length Unequal-Length Intake Runners Chapter 8: Moving Valve Events Standard Optimization Techniques Improved Optimization Techniques Chapter 9: Camshaft and Cylinder Head Selection Exhaust to Intake Flow Percentages and Flow Curve Shapes Cylinder Head Configuration The Combustion Chamber CFM per Cubic Inch Chapter 10: Other Engine Considerations Bore-to-Stroke Ratios Rod-to-Stroke Ratios EFI versus Carbureted Octane and Other Fuel Considerations Variable Advance, Centerline, Duration, and/or Lift Systems Variable Displacement Systems Power Adders Valve-Spring Selection with Boost Thermal Management Chapter 11: Valvetrain Selection Camshaft Type Deciding Target Lift Selecting Lift and Profiles around the Valve Spring Rocker Ratio, Journal Size, and Lifter Wheel RPM and Durability Targets Comparing Profile Aggressiveness Optimizing the Camshaft for the Application Why Do Cam Guys Ask so Much about My Vehicle? Chapter 12: Camshaft Selection Examples Small-Block Chevy Crate Upgrades: 350 versus 383 Street versus Racing GM 5.3L LM7 Cams: C10 pickup to Circle-Track and Drift 6.4L Hemi: Blower and Cam Packages Glossary

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