I recently spent several days reading books about efi idle tuning and improving my engines idle quality. 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. I have several holley books, but the best is the 2nd one down by emanual. The carbs here are 4150hp mechanical secondary carb numbers. R120 to r1848a r1849aa to r3607a r3608a to r62761a r6276a to r7253aaa r7262a to r8410a r8411aas to r9778a r9779a to r850. Des hammills book was published in the uk in october 2005, making it recent and relevant in chronological terms especially for the auto industry, where tuner books are often a decade or two old but sometimes less than complete for american buyers, especially those with vehicles not made by gm. We now have an association with, and have selected a few holley books for you to choose from. This informationpacked guide provides a detailed view of basic carburetor functioning, modifying for performance applications, customtuning for street, racing. Im not going to go into great detail, there are many sites and books do that, but by following these steps, you should get the car running fairly well with a double pumper holley and then you.
Plug readings are not an accurate representation of wot driving at this point. The holley carburetor is an icon in the performance industry. Order holley carburetors for your vehicle and pick it up in storemake your purchase, find a store near you, and get directions. The holley sniper efi selftuning kits feature all the benefits of efi, and are a perfect option for street cars, muscle cars and offroad vehicles. The ultimate guide to holley carburetors hot rod network. Modern tuning techniques for holley carburetors dragzine.
The book merged all of the important tuning aspects that directly impacts the carbs tune such as. Learn how to select, install, tune and modify all popular holley performance carburetors. I refer to it much more than any of the others that i own. Part 1 of 2 a lot of videos are long and provide too much information or are cut short on holley carbs. Holley carburetor preparation and tuning guide muscle. Failure to follow these instructions, including the pictures may result in subsequent system failure. I own at least nine different books on holley carbs, several general repair manuals that cover the holley, and have cut out many articles. This is a numerical list of most holley carburetors from 1934onward. A guide to how a holley carb works and how to tune it.
For over 100 years, holley has been the go to resource of fuel systems for automotive innovators, professional drivers, and weekend racers alike. Holley carburetors paperback july 24, 1999 by dave emanuel author 4. David vizards how to super tune and modify holley carburetors. To tweak one of the base tunes follow holleys section 3. Holley offers a kit pn 20 that contains several colorcoded springs. Carburetor selector carburetors holley performance products. You are going to need at least one for the photos and part numbers.
Holley 550511 sniper efi selftuning kit black ceramic finish. Another good source for holley books, and car books of all sorts, is the online service. Whether youre a carb rookie or an experienced enthusiast, you can tune, repair, and select the proper carb for your vehicle. Another source of information is the tuning guide in holley rebuild kits. And this isnt done in the generic way manufacturers market there products. I did my best to create a short holley carb tuning series for my fellow holley carb guys. An inline fuel filter should be installed between the fuel pump and the carburetor. Holley carburetor specifications, list numbers, jetting. One of the things we noticed over the years is the lack of information concerning holley list numbers and the specifications for individual carburetors and their stock jetting. Discussion in the hokey ass message board started by 48tom, oct 3, 2011.
Make offer holley performance 557101 watermethanol injection system installation kit 850 cfm holley 4bbl. As mentioned earlier, by selecting the correct spring for the vacuum chamber, you take care of. Carburetor technical support holley performance products. In fact, it is not at all complex, but it can be time consuming. My dad and i installed a holley 4010 on his 83 capri back in the late 80s and that was the first carburetor i ever worked on.
Do a search for holley and youll get several books to. Single stage power valves are available in 1 increment sizes from 2. Its simple design and near infinite adjustability have long made it a favorite among enthusiasts. Holley carburetor tuningcalibration kits contain a selection of main jets, pump nozzles, and power valves in popular sizes, all contained in a handy and durable compartmentalized plastic case. As a single solution, or partnered with products from other holley companies hooker headers, flowtech headers, nos nitrous, weiand, earls performance plumbing, or diablosport holley.
While efi tuners routinely use this new technology with great success, surprisingly few. The ultimate guide to holley carburetors everybody has a least carburetor, but not everybody knows how to tune them, so were giving you a bunch of charts, graphs, advice and tips so. Bg, or barry grant, also makes parts for holleys, and offers them at a fraction of the holley price. How to tune your holly carburator early bronco registry. 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. There are two stage power valves available that are more for economy minded users rather than performance enthusiasts. Books and available at your local holley distributor holley pn. Eliminate typical carburetor cold starting issues, hesitations, flooding and vapor lock. When buying tuning parts for your holley you have two choices. Holley 36378 holley carburetor installation and tuning dvd.
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. Holley carburetor full power circuit calibration guide. Sniper efi four fuel injector kits can support up to 650 hp. An easy way to improve the performance and efficiency of your carbureted engine is with this holley 550511 sniper efi selftuning kit in a stylish black ceramic finish. I bought this book not really expecting much as ive had decent success tuning holley carbs in the past simply using the information available from holley and.
I have always thought that the low speed jets were too rich, and i have to set the idle screws at 14 turn out to get it lean enough at idle. Often, many enthusiasts first modification is swapping out the factory induction system for a new holley 4barrel carb and intake manifold. This is how i baseline a holley 4150 double pumper carburetor. Holley is a very recognizable name in the automotive industry and you can bet that this product will not disappoint. The book covers much more than holley carb tuning too thankfully. In addition, the parts case allows you to keep parts organized and readily at hand.
Ideal for trackside tuning, these kits provide a quick and easy way to accomplish your. Holley black ceramic finish sniper efi selftuning kit. Conversely, a heavier vehicle with a smaller engine can benefit from using a stiffer spring to avoid a stumble upon acceleration. The process for building a base tune from scratch is explained in section 2. The initial testing was done with 6782 jetting, and the problem was exagerated with black fuel smoke visible under a static rev in neutral.
Ideal for trackside tuning, this kit provides a quick and easy way to accomplish your carburetor tuning with the correct parts. The holley 4150, 4160 carburetor handbook, will teach you the basics of idling, choke, power, accelerator pump, mainmeetering, fuel inlet, and more 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. I finally achieved, what i consider, an excellent idling engine. Tuning and assortment kits holley performance products. After determining the carburetor is a holley, look for the code numbers, usually located on the side of the air horn. If this manual is not fully understood, tuning should not be attempted. I own at least 9 different books on holley carbs, several general repair manuals that cover the holley, and have cut out many articles from car craft, hot rod, and other magazines. Considerable mystery surrounds the tuning of the secondaries on a holley carb. Through the years, holleys 4150 series carbs have been poked and prodded with many upgrades. Float levels are accurate according to most holley reference books i own. I highly recommend original holley rebuild kits, gaskets, and power valves. Carburetor installation and tuning blog holley performance.
Holley doesnt just design, engineer, and assemble their parts. Adjusting your carburetor hot rod, slayer, and super street carburetors how to repair stripped fuel bowl bolts how to identify your holley or demon. This tuning kit contains a selection of main jets, pump nozzles and power valves, in popular sizes, all contained in a handy and durable, compartmentalized plastic case. I now have a few of these holley 4010 carburetors and i want to get the one on my 85 working better. These instructions must be read and fully understood before beginning installation. Holley carb tuning with o2 indicator your post is hard to follow, but i would close down the secondary idle speed some and run more on the primary slot, put a vaccum gauge in it while you doing this it sounds like your not using the power valve, but the way your driving it you might try a two stage power valve, or your spark curve is off what is it, and curved at it may not like the. Holley carburetor tuning guide 4150 carbs part 1 youtube. You take the engine cubic inch and multiply by the maximum rpm and divide by 3456. Here we have gathered all of the currently available holley carburetor specs 4150 hp series. But recently, holley took the 4150 lineup and pretty much rebuilt it from scratch, creating the holley aluminum ultra xp 4150 series double pumpers which offer unprecedented adjustment and tuning capabilities, and ease of maintenance. All of these parts are available on our website as well as more holley carburetor tuning parts.
Obviously, holley offers original parts at the holley price. This will, at the very least, give you a baseline as to what your carb should have started out with. The holley model number is present along with the auto maker part number, if factoryissued, a date and application code. In fact, i believe the holley hpdominator ecu is more sensitive to idle tuning idle algorithm, than the commander 950 is. If the vehicle is light and the engine is large, a lighter spring can be used to accommodate a faster engine speed increase. Holley makes performance style standard flow or a high flow power valve which has a large opening. Holley has been in the carburetor business for over a century, and has mastered this art form. Holley carburetor numerical listings technical information. If you have an automatic transmission you will need a vacuum sec.
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