Holley dominator carb tuning book

As for jetting, on a new carburetor, the first thing is to see if the jetting is even in the ballpark. Cartech how to rebuild holley carburetors book sa330 benefits and features. This tech tip is from the full book, david vizards how to super tune and. If you look under the hood of a 19651985 mustang, you will most likely discover a holley carburetor, an icon in the performance industry. Cartech book how to rebuild holley carburetors cj pony parts. This diy book covers holley carburetor repair and adjustment, and a bonus section shows you how to choose a holley carb based on your engines size and its volumetric efficiency. The bog or hesitation may be caused by a momentary lean condition when the carb goes from the idle throttle postion to the main metering system. Holley does a pretty decent job of supplying a readytorun carb, so the jetting, pump cam, shooter sizing. Often, many enthusiasts first modification is swapping out the factory induction system for a new holley 4barrel carb and intake manifold. Picking the right carb for your motor by bobby kimbrough august 18, 2011 in terms of todays highly technical world, carburetors are the simplest, but often most misunderstood, means of fuel delivery to an internal. David vizards how to supertune and modify holley carburetors. The holley 4150, 4160 carburetor handbook, will teach you the basics of idling, choke, power, accelerator pump, mainmeetering, fuel inlet, and more. Beyond that there are basic tuning components available to tune the. The holley carburetor is an icon in the performance industry.

The last 5% me it seems know within 200rpm what circuits are working and when. David vizards how to super tune and modify holley carburetors. And this isnt done in the generic way manufacturers market there products. The legendary double pumper, the universal 600cfm 1850 models, the dominator. Reassemble carburetor to stock form, so fine tuning efforts can be. Singleplane manifolds tend to favor upperend power at higher engine speeds. If the car is street legal, take it out, hold it at 2,500 rpm or so under a steady load and. For the novice mechanic it provides a precise stepbystep guide. Holley carburetors powered every monster energy nascar cup team and nearly every nhra prostock champion for four decades. Before you go trying to fix all the errors of the previous carb tuner, set your carb up to the stock holley spec for your carb list number stamped into the front of the air horn.

May 19, 2017 to tweak one of the base tunes follow holleys section 3. While efi tuners routinely use this new technology with great. I finally achieved, what i consider, an excellent idling engine. This tech tip is from the full book, holley carburetors. The yellow pump cam is a separate part number 2081 intended for dominator carburetors. Holleys dominator line of carburetors were designed for competition use. I guess i could always have a street carb and drag carb but sounds like a great way to develop fuel leaks. The book merged all of the important tuning aspects that directly impacts the carbs tune such as. After two weeks of reading online here and there and some bedtime reading in a holley carburetor book i purchased, i removed the carb and cleaned it all up in my garage. In david vizards 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 its.

Holley has been in the carburetor business for over a century, and has mastered this art form. In fact, i believe the holley hp dominator ecu is more sensitive to idle tuning idle algorithm, than the commander 950 is. I was amazed at how well the car ran with this carb straight out of the box. Cartech how to super tune and modify holley carburetors book. How to super tune and modify holley carburetors david. The dominators offer a wide range of adjustments to tailor the air and fuel flow curves to an engines specific needs on a given day. To get these results, the 1050 dominator calibrations were given a. In how to super tune and modify holley carburetors, best selling author vizard. Easy to read, detailed stepbystep instructions on disassembling, cleaning and reassembling holley carburetors explains best practices and techniques for rebuilding your carburetor covers major holley carburetors like the double pumper, avenger and dominator. These instructions must be read and fully understood before beginning installation. I cant find anything after days of web searching on tuning a 4500 for a street car. Remember on all our 1050 based dominator carbs they can be made into a complete 2 circuit by simply plugging that intermediate circuit shut as well there is a jet there for that. This book has detailed pictures of your carb with labels showing what the different passages and restrictors are.

Holley carburetor preparation and tuning guide muscle car diy. If you have an automatic transmission you will need a vacuum sec. Efi idle tuning notes i finally achieved, what i consider, an excellent idling engine. Double pumper, dominator, and 4160 vacuum secondary models, as well as all the recent releases from holley, including the ultra street avenger and. I verified that the 30cc power valve was not damaged and the accelerator pump arms where properly adjusted with the spring.

In david vizards 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. However, sometimes a little more fine tuning is needed because the customer has a. In fact, i believe the holley hpdominator ecu is more sensitive to idle tuning idle algorithm, than the commander 950 is. This tech tip is from the full book, david vizards how to super tune and modify holley carburetors. As you can see, theres much more to setting idle mixture properly. The ultimate guide to holley carburetors hot rod network. I went down three sizes of main jet and up two sizes of idle circuit air corrector as it came from holley. However, if an adapter is required one is available through your holley distributor under pn 179, which adapts the model 4500 to afb holley square flange manifolds. What size air bleeds should i use with my 4150hp or 4500hp dominator carb. Tuning holley dominator on the street engine tech first. Picking the right carb for your motor by bobby kimbrough august 18, 2011 in terms of todays highly technical world, carburetors are the simplest, but often most misunderstood, means of fuel delivery to an internal combustion engine.

Double pumper, dominator, and 4160 vacuum secondary models, as well as all. If you are determined to use a 950size carb and want the looks of a dominator, the good news is that holley has a 950 dominator that works very well. Whether youre a carb rookie or an experienced enthusiast, you can tune, repair, and select the proper carb for your vehicle. For the novice mechanic it provides a precise stepbystep guide to rebuilding a holley carburetor. Jul 16, 2017 holley and other manufacturers offer a wide array of single and multiple carb manifolds. Holley carburetor full power circuit calibration guide. Modern tuning techniques for holley carburetors dragzine. Holley carburetor specifications, list numbers, jetting. To get these results, the 1050 dominator calibrations were given a great deal of attention at wot and at part throttleidle. You take the engine cubic inch and multiply by the maximum rpm and divide by 3456. Carburetor technical support holley performance products. Jul 27, 2015 to get these results, the 1050 dominator calibrations were given a great deal of attention at wot and at part throttleidle.

Just in case you want to go 2 circuit for some reason. Before you begin to tune your carburetor for your particular vehicle, you must get a feel for your vehicles performance. First of all think of the dominators as just two really big two barrel carbs joined at the head like a siamese twin okay. Holley carburetor specifications, list numbers, jetting, and. Hoping someone can point me to a detailed tuning guide. Holley carb baseliningtuning its been a while since ive been asked a carburetorrelated question, but this one came up this week so i figured id do a little writeup. Throttle position is listed across the bottom xaxis, while the pump cam lift is listed on the vertical yaxis. This book is an essential addition to any performance enthusiasts library. To 75% of holley carb user they wont care,holleys get bad mileage but they are faster. And while the whole process of getting your carb dialed in can be tedious even a bit daunting holley carbs help simplify it by providing great performance straight from the factory. The layout for hp carburetor metering blocks and dominator carbs will look slightly different from this standard holley twocircuit metering block, but most of the circuits are exactly the same.

How to adjust tune holley carb carburetor tutorial instructions. Cj pony parts now has this cartech how to super tune and modify holley carburetors book sa216 that will give you all the info and help youll need to get the peak performance out of your carburetor. Nov 30, 2015 holley has been in the carburetor business for over a century, and has mastered this art form. Finetuning the carb in this manner will improve partthrottle operation and should eliminate that annoying offidle stumble. While efi tuners routinely use this new technology with great success, surprisingly few carb owners have warmed up to the idea yet.

I have had many guys come to run on the dyno and go from an 850 type to a dominator unless the engine was making over 625 hp, i never saw a gaini have made 740 hp with an 850 type demon carb on several differant engines on one 540 bb, i got up to 828 with a 1050 demon 850 style the manifold is usually better on the dominator style carb. This is how i baseline a holley 4150 double pumper carburetor. Holley dominator series carburetors jet performance products. Engine testing all carburetors prior to shipment ensures that when a new qft carb is bolted on an engine, it will start, idle and perform up to the customers expectations. I recently spent several days reading books about efi idle tuning and improving my engines idle quality. Seller assumes all responsibility for this listing. To the experts, this book is a valuable reference source for part numbers as well as clear and precise photos of parts and diagrams. Holley carburetor tuning guide 4150 carbs part 1 youtube. In david vizards how to super tune and modify holley carburetors, best selling author vizard explains.

To tweak one of the base tunes follow holleys section 3. The process for building a base tune from scratch is explained in section 2. Once you know the baseline setup you can make appropriate changes to improve the carbs performance. Holley also has a kit for gen 3 dominator carbs that is very compact. Holley carburetors paperback july 24, 1999 by dave emanuel author 4. Holley performance products highly recommends that a quality fuel filter be installed with any replacement carburetor to. They flow large amounts of air and fuel, as 1,050, 1,150, and 1,250cfm models are available. Holley and other manufacturers offer a wide array of single and multiplecarb manifolds. According to this book, the idle feed restrictor is located in the booster cluster. Failure to follow these instructions, including the pictures may result in subsequent system failure. The main system is designed to operate and flow enough fuel either way as a 2 or 3 circuit. 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.

Dec 11, 2006 best holley carb for 347 stroker combo. Over the past 50 years, the venerable holley carburetor hasnt changed much. Tuning carburetors is an art form, often requiring experienced judgement to determine if and what adjustments need to be made. Once you know the baseline setup you can make appropriate changes to improve the carb s performance. Im not going to go into great detail, there are many sites and books do that, but by following these steps, you. Place the carburetor in position over the four stud bolts and secure in place. Holley carburetor bog and hestitation fixed nick bartlett. Aug 01, 2001 finetuning the carb in this manner will improve partthrottle operation and should eliminate that annoying offidle stumble. I have run both the 9375 and the 8896with the pvs plugged on many mild big blocks from 427 to 509 cubes and they all end up in the same 9094 jet range. In his book, david vizards how to super tune and modify holley carburetors, the author explains the science, the function, and the tuning expertise required to get your holley carburetor to perform its. Holley has been the undisputed leader in fuel systems for over 100 years. The book covers much more than holley carb tuning too thankfully. Mar 27, 2018 in racing applications with hugelift cams, big stalls, and high rpm, a larger carburetor might be needed to get the desired level of performance. How to rebuild is a great addition to any car lovers library and workshop.

This is a reproduction of the holley accelerator pump cam lift curve. Sa design david vizards how to super tune and modify. A new beefier pump arm from the linkage and some longer screws. The book merged all of the important tuning aspects that directly impacts the carb s tune such as. The holley 2300 is a double barrel, manual choke carburetor with. Its simple design and near infinite adjustability have long made it a favorite among enthusiasts. Sa design david vizards how to super tune and modify holley. Quick fuel technology qft ships carburetors only after they have been thoroughly runtested and adjusted on a typical engine. Jul 01, 2008 the layout for hp carburetor metering blocks and dominator carbs will look slightly different from this standard holley twocircuit metering block, but most of the circuits are exactly the same. Strange as it may seem, the main jet on a holley carb is not what you.

Part 1 of 2 a lot of videos are long and provide too much information or are cut short on holley carbs. Neat thing about the holley accelerator pumps is that the diaphragm also serves as its own gasket. In racing applications with hugelift cams, big stalls, and high rpm, a larger carburetor might be needed to get the desired level of performance. The knowledge base for holley tuning is not likely to become a lost art. Holleys dominator line of carburetors were designed for competition. Now, holley efi products power these cars and are dominating the performance world.

I have copies of the manufacturing variables on all the dominator s from holley that list things not in the books. Power valve tuning theres more to tuning the holley power valve on the primary side than just choosing when the valve opens. Holley carburetor preparation and tuning guide muscle. Singleplane manifolds tend to favor upperend power at.

And by far, the most popular carb still in use is the holley carb. This fine tuning resulted in the 700hp mark being surpassed. Jan 15, 2015 part 1 of 2 a lot of videos are long and provide too much information or are cut short on holley carbs. Its a pain in the ass but i get 15 mpg with a 850cfm demon around town and 18 on the road at 70mph,430ci ford fe.

Holley idle feed restrictor mod ford muscle cars tech forum. Nov 25, 2009 how to adjust tune holley carb carburetor tutorial instructions. Tuning a 2300 holley carburetor is a straightforward process thanks to holleys simple design and exterior tuning capability, meaning the carburetor may be adjusted on the fly while mounted to the intake manifold. Cartech book how to super tune and modify holley carburetors. Carb science series accelerator pump tuning for holley. I did my best to create a short holley carb tuning series for my fellow holley carb guys. If this manual is not fully understood, tuning should not be attempted. Easy to read, detailed stepbystep instructions on disassembling, cleaning.