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Cylinder Heads:Unshrouding Valve/CNC Porting/Blending/Flow Testing Manual SA215
Cylinder Heads:Unshrouding Valve/CNC Porting/Blending/Flow Testing Manual SA215

Cylinder Heads:Unshrouding Valve/CNC Porting/Blending/Flow Testing Manual SA215

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Cylinder Heads:Unshrouding Valve/CNC Porting/Blending/Flow Testing Manual SA215
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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.
Chapter 1: What It Takes to Make Power 
Point of Maximum Flow 
Seat and Port Priorities 
Do You Need a Flow Bench? 

Chapter 2: Flow Testing Procedures 
The Standard Pressure Drop 
Real-World Test Pressures 
Corrections 
Floating Pressure-Drop Testing 
Intake Fixation? 
Flow Efficiency 

Chapter 3: A Flow Bench—Build or Buy
A Rethink on Matters 
Current Conclusions 
Flowing the Exhaust 
Establishing the Numbers 
Summary 
Budget Computerization 
Audie Technology 
Performance Trends 
Other Bench Sources 

Chapter 4: Wet-Flow Testing 
Wet-Flow Testing—What’s it Worth? 
Six Wet-Flow Mistakes to Avoid 

Chapter 5: Porting Aftermarket Heads 
Air Flow Research 
Dart 
Edelbrock 
EngineQuest 
Racing Head Service 
Trick Flow Specialties 

Chapter 6: Porting Tools, Consumables and Safety 
Eye and Lung Safety 
Grinders—Air or Electric 
Carbide Cutters 
Support Porting Tools 
Sourcing Consumable Supplies 
Chapter 7: Five Golden Porting Rules 
Rule Number 1 
Rule Number 2 
Rule Number 3 
Rule Number 4 
Rule Number 5 

Chapter 8: Developing Functional Ports 
Valve Seat Forms 
Working Valve Seat Shapes 
Alternative Seat Angles 
Seats on Valves 
Valve Shapes 
Clearances and Temperatures 
Cutting Valve Seats 

Chapter 9: Valve Shrouding 
Practical De-shrouding 

Chapter 10: Developing Functional Heads 
Optimizing Cylinder Head Airflow 
Valve and Flow
Ports 
Cross-Sectional Area 
Port Velocity 
Applied Basic Porting 
Compression Increase 
Modified 170s on the Dyno 
The Virtual Flow Bench 

Chapter 11: The Combustion Process 
Defining Combustion 
Combustion Efficiency 
British Touring Car Championship Year 
Finally: The Chambers 
More Combustion Curiosities 
Atomization Optimization 
Thermal Barriers 
Swirl and Quench 
More Thermal Management 
Small Crevice Volume—Big Consequences 
Conclusions 

Chapter 12: Maximizing Compression Ratio 
Thermodynamics Made Easy 
Dynamic Compression 
Intake- to Exhaust-Valve Ratios 
Containing the Pressure

Specifications:
Pages: 160
Size: 8.5 X 11 (inches)
Format: Paperback
Illustrations: 304 Color Photos
Publisher: CarTech
ISBN: 9781934709641
Product Code: SA215
Specifications
Publisher: CarTech, Inc.
Softcover: Approx: 200 pages
Dimensions: 11.0 x 8.5 x 0.5 inches
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