Publisher Description

The Holley carburetor is an icon in the performance industry. Thirty, forty, even fifty years ago, if you looked under the hood of any modified or performance car, you more than likely would discover a Holley carburetor lurking there. Often, many enthusiast's first modification is swapping out the factory induction system for a new Holley 4-barrel carb and intake manifold. While many of today's modern cars have moved past carburetors and into high-tech fuel-injection systems, most cars from the highly collectible eras are still running carburetors. Carbs are comparatively inexpensive, highly tunable, and do not require laptops, expensive tuning equipment, or computers to function. And by far, the most popular carb still in use is the Holley carb.

In David Vizard's How to Super Tune and Modify Holley Carburetors, best selling author Vizard explains the science, the function, and most important, the tuning expertise required to get your Holley carburetor to perform its best for your performance application, whether it's street, strip, supercharging, or race applications. Holley has been a best-selling subject for years, and this much-needed update guides you through the traditional 4150 Double Pumper, Dominator, and 4160 vacuum secondary models, as well as all the recent releases from Holley, including the Ultra Street Avenger and Ultra HP Series Carbs.

With its high degree of tuning ease, and with all the new models coming into the market, the knowledge of an expert like Vizard is a requirement to meet your performance goals, now more than ever. This book is an essential addition to any hot rodder's library.

Back Cover

The Holley carburetor is an icon in the performance industry. Thirty, forty, even fifty years ago, if you looked under the hood of any modified or performance car, you more often than not discovered a Holley carburetor lurking there. Many enthusiasts' first modification is swapping out the factory induction system for a new Holley 4-barrel carb and intake manifold. While many of today's modern cars have moved past carburetors and into high-tech fuel-injection systems, most cars from the highly collectible eras are still running carburetors. Carbs are comparatively inexpensive, highly tunable, and do not require laptops, expensive tuning equipment, or computers to function. And by far the most popular carb still in use is a Holley. In David Vizard's How to Super Tune and Modify Holley Carburetors, best-selling author Vizard explains the science, the function, and most important, the tuning expertise required to get your Holley carburetor to perform its best for your performance application, whether it's a street, strip, supercharging, or race application. Holley has been a best-selling subject for years, and this much-needed update guides you through the traditional 4150 Double Pumper, Dominator, and 4160 vacuum secondary models, as well as all the recent releases from Holley, including the Ultra Street Avenger and Ultra HP Series carbs. With its high degree of tuning ease, and with all the new models coming into the market, the knowledge of expert David Vizard is a requirement to meet your performance goals, now more than ever. This book is an essential addition to any performance enthusiast's library.

Author Biography

David Vizard is a revered engine builder, technical writer, and author. In fact, he has authored more than 30 highly respected engine building and automotive books, penned about 4,000 magazine articles, and contributed scores of web pieces to popular sites. Often referred to as Vizard the Wizard, his work is often the subject of blogs and editorial pieces in popular automotive magazines. Currently, he owns and runs MotorTec Magazine in Charlotte, North Carolina.

Table of Contents

Acknowledgments 4 Introduction 5 Chapter 1: A Carb's True Function 9 Functions of a Carburetor 9 The Impossible 10 Mileage Improvement 11 Chapter 2: Operating Principles 13 Basic Function 14 Exploring Venturi Properties 14 Applying the Venturi Effect 15 Air Correction Function 15 Calibration Considerations 16 Boosters 18 Idle and Transition System 20 Accelerator Pump System 21 Carb Sizing 21 Carb Options 22 Chapter 3: Calibration Requirements 27 Max-Power Mixture Ratio 27 Idle Mixture 29 Cruise Mixture 30 Chapter 4: Simple Mixture Measurement 33 The First Circuits to Calibrate 34 Accelerator Pump 37 Plug Reading 37 Track Practice 39 Stagger Jetting 41 Fuel Wash 42 Ignition Timing 43 Chapter 5: Mileage Calibration 45 Mileage Makers and Breakers 45 Vaporizing Factors 46 Enhancing Combustion Conditions 47 Cylinder Fill 47 The Spark 48 Some Unconventional Systems 51 Economy Tuning 54 Chapter 6: Carburetor Selection 56 How Much Carb CFM is Needed? 56 Volumetric Efficiency 57 High-Performance Dual-Planes 59 Multiple Carbs 62 Spacers 64 Vacuum Secondaries 65 Sizing with Alcohol-Based Fuels or Nitrous 66 Brake Specific Air Consumption 67 Chapter 7: Booster Science 68 Venturi Action 70 Booster Gain 70 Carb Sizing 72 Atomization Requirements 73 What's It Worth? 75 Annular Discharge Booster Myth 76 Chapter 8: Idle and Transition Calibration 77 Idle Mixture Calibration 77 Oxygen Sensors 81 Road Test 81 Chapter 9: Full-Power Circuit Calibration 82 Main Jet 82 Cruise Calibrations 84 Max-Power Calibrations 85 Target Air/Fuel Ratios 87 Fuel Curve and Emulsion Wells 88 Weather and Altitude Changes 88 Vacuum Secondary Systems 89 Chapter 10: Accelerator Pump Circuit Calibration 94 Accelerator Pump Circuit 94 Accelerator Pump Components 95 Preliminary System Tune 96 Final System Tune 97 Part-Throttle Response 97 Chapter 11: Ram Air and Heat Management 99 Air Temperature 99 Fuel and Charge Temperatures 101 Artificial Charge Cooling 103 Super-Cooling Cool Can 105 Cool Fuel Compromises 105 Evaporative Cooling 106 ACC in Practice 107 Performance Conclusions 108 Chapter 12: Fuel Systems 109 Jet Extensions, Fuel Slosh and Fuel Level 110 Floats and Bowls 111 Needles and Seats 112 Pressure Regulators 114 Fuel Lines and Filters 117 Mechanical Fuel Pumps 118 Electric Pumps 119 Chapter 13: Calibrating for Various Fuels 121 Oxygenated Fuels 122 E85 125 Metering Blocks 127 Chapter 14: Improving Airflow 130 The Source of all Induction 130 Making More Air 131 Flow Mods: Phase One 132 Flow Mods: Phase Two 133 Flow Mods: Phase Three 136 Power Increase 139 Chapter 15: Intake Port Matching 140 Simple Port Matching 140 Complex Port Matching 142 Intentional Port Mismatching 142 Source Guide 144

Review

"You will be surprised by what you will learn here as there is plenty to learn from within the pages of this book."--Mike Caruso "engine professional" (8/28/2014 12:00:00 AM)
Gold Medallion Winner for Book Writing: Technical/How-to -International Automotive Media Awards, 2013-- "2013 IAMA Award Winner" (7/14/2014 12:00:00 AM)

Long Description

In David Vizard's How to Super Tune and Modify Holley Carburetors , best-selling author Vizard explains the science, the function, and most importantly, the tuning expertise required to get your Holley carburetor to perform its best for your performance application.

Review Text

Gold Medallion Winner for Book Writing: Technical/How-to -International Automotive Media Awards, 2013

Details