David Vizard's How to Super Tune and Modify Holley Carburetors (Performance How-To)

Vizard’s books are good, he is thoughtful and thorough. First one I read was about the British Leyland ‘L’ series engine, used in the (real) mini, and many other small brit cars. I don’t like those cars much, but the book was excellent. Informative and entertaining. Learn from it and adapt to your brand. This one is the same way- read it to improve your carb understanding, whether or not Holleys are your thing. I have never owned a 4 bbl Holley, but they are common and serve as a good example....something to learn about, develop an understanding, and apply where needed. If this doesn’t sound good, you can stick to adjusting idle speed or replacing the air filter. This is a person who thinks hard about why things work how they do, and how to make them better. Also, about what might be “how its always been done” but doesn’t really work. His suggested ideas are backed up with testing, not some silly anecdotal evidence. That method of supporting ones opinion is, sadly, common in this sort of book, but Mr. Vizard doesn’t do that. I can’t imagine the time he’s spent learning what went into this and the other books. Just so you know- It isn’t step by step instructions for one application, or a service or parts manual. I do wish that manifold pressures were given in psi absolute rather than vacuum, but power valves etc. are sold by opening vacuum....most of us live below 1000 ft. msl...I guess it works. It doesn’t take away from an excellent book.

Nice product

The step-by-step approach described in this book walks the tuner through the steps to adjust each stage of the carburetor, the idle stage, the transition stage, and beyond. The perspective is original to this publication, I found it to be very helpful in the process. The author David Vizard references situations from his personal experience in tuning, which I also found to be helpful. He is a very respected Authority in the Automotive world with videos on YouTube and other publications. I highly recommend this book!

I have worked with carbs for decades and decided to check out this book and wish i had read it a long time ago... I have learned more in the last couple of hours than i have in soo many years... I expected it to just explain how a carb works, the circuits and how to modify/tune them.. but it's soo much more explaining how each system in a engine works in correlation with tuning the carb and in great depth.. So many people say "do this or do that" without explaining why you do these things just because they have been told to do it themselves. It's nice to have the underlying information of why these changes work and a real foundation to understand why we do these things.

More than you'll ever need to know about flow and atomization through Holley carburetors. Good detail on all the fuel and vacuum circuits. Great tips on DIY modifications and troubleshooting. I'd like to have seen a complete detail diagram for quick reference or one chapter that had a step by step build from scratch to follow. All in all, a great read and a great reference text for the engine builders library.

This book gets pretty deep. If you have basic carb tuning knowledge and want to expand it then this is the book for you. On a 1986 s10 with a 350sbc/700r4 and Holley xp650 I was getting 12mpg with an occasional stumble on tip in that got worse with smaller jets or larger air bleeds and after reading this book and applying some of its strategies I now get 18mpg with no stumble at all. Pretty awesome out of a race carb especially with my lead foot. Definitely worth the investment

I bought this book not really expecting much as I’ve had decent success tuning Holley carbs in the past simply using the information available from Holley and the Internet. After reading it a lot of “why” questions I had about these carbs were no longer a mystery. The book covers MUCH more than Holley carb tuning too thankfully. The book merged all of the important tuning aspects that directly impacts the carb’s tune such as: ignition timing, intake manifold selection, cam profiles, and head flow. And this isn’t done in the generic way manufacturers market there products. This book provides incredibly detailed explanations on why these different components are used and or tuned the way that they are. Even better still is the countless dyno grace h comparisons of different combinations, showing the affect of each individual component selection and tune. The book gives MANY different tuning methods too. Each method of tuning is discussed, evaluated, and then demonstrated. What this book isn’t: it is not a complete replacement for the standard tuning guide included with all Holley carburetors. These carbs simply aren’t that complex and the instructions alone are more than ample to get you going. This book does have complete tuning procedures however because it includes lengthy explanations along side the instructions it’s not practical to have this book opened up under the hood of an idling car. There is no itemized list of tuning steps, you have to read closely. This book really answers the “why” questions a carb tuner might have. It does also answer the “how” questions too just not quickly.

A great deal of technical detail based on real measurements and years of detailed research and development. Gives you a way of effectively tuning and designing your carburetor based fuel system based on facts, rather than guesses. Little details I simply never understood are explained in detail, expanding ability to fine tune designing a Holley carburetor based fuel system (with relevant information concerning all carburetors). Both theory and design detail are provided. A deep dive into more complete understanding.

Great book, explains everything you need to know to tune a Holley.

Boken är utmärkt, Vizard kan sina saker. Varning bara att säljaren "Fishpond" är baserad nånstans utanför EU. Det tillkommer alltså 75 SEK till PostNord för att det kommer utifrån och därtill tull och moms. Anmärkningsvärt att detta inte hanteras av Amazon som "Svensk" återförsäljare.

Ich hab schon fast 20 Jahre lang Holley Vergaser in der Hand und hab die auch schon abgestimmt, aber das Buch hat mir jetzt bei einem Problem geholfen und der Vergaser ist noch besser abgestimmt auf den Motor (355 SBC). Im Netz findet man zwar auch viele Infos zu den Vergasern, aber so spare ich mir das ausdrucken und suchen im Netz.

Très bon livre: mais attention très compliqué car l’étude va vraiment loin. Il y a plus simple comme livre...

This book, not a pamphlet, has color pictures, big type face-easy to see in a dark garage. David Vizard is an encyclopedia of information and anything you need to know about a Holley is in this book. Will buy again if this one gets lost or catches fire. Looking forward to educating myself with the help of DV's book.