It causes the transfer slot to be over exposed, creating mayhem in the carburetor and confusion for the tuner. With the engine turned off, have an assistant slowly press the accelerator pedal to the floor, while you watch the throttle for any sticking or binding. When the company was based in michigan it was a major producer of carburetors for many detroitbuilt automobiles. Helpful information you need when you rebuild your carburetor. Holley performance products is an automotive performance company based in bowling green, kentucky. Troubleshooting your holley carb august 2, 2017 wayne scraba fuel delivery, howto and tech tips, news 1 holley carburetors find their way onto countless vehicles, from race cars to hot rods to delivery trucks, and for good reason. Instruction manual to download this manual or others, go. If you have an automatic transmission you will need a vacuum sec. Holley has been the undisputed leader in fuel systems for over 100 years. Congratulations on your purchase of the marine avenger carburetor. Oct 23, 2015 if you find a lower price on the same item, change the price and buy. Most of it was information that is free if you call holley tech support. In david vizards how to super tune and modify holley carburetors, bestselling 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. Download file pdf ebook how to tune carburetor car engine ebook how to tune carburetor car engine carburetor adjustment basics ericthecarguy in a way this is part 3 of my carburetor series.
In basic terms, if you want lowend torque at lower engine rpm, consider a dualplane intake manifold. Holley vacuum secondary 650 cfm carb universal for 196569 gm applications only. Install the new throttle ball, lockwasher, and retaining nut to the carburetor throttle lever in the same position as the existing carburetor. These instructions must be read and fully understood before.
Holley and other manufacturers offer a wide array of single and multiple carb manifolds. Locate the two airfuel mixture screws on the metering blocks. How to adjust the idle mixture on holley carbs holley blog. For years, i was used to setting the injector ms in the grid and tuning that way. If you have an older model carb you can purchase a small, inexpensive, easy to install kit from holley pn 125500 that will also protect the power valves in case of an engine blowback thru the carb. We feel that you have purchased the finest marine performance.
Here are the proper steps for setting the idle mixture needles. Fortunately, its easy to adjust the idle mixture with a simple screwdriver and a quality. Carburetor essential tuning and setup tips fourbarrel. 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. Holley carburetors consist of a body and several components which attach to the body. Be sure to note the adjusted position of your model carburetor, as this can be important information used later during fine tuning. If this manual is not fully understood, installation should not be attempted. A 750 double pumper holley carburetor is a high performance carburetor that incorporates two accelerator pumps that are manually operated. For best results, holley strongly recommends an intank pump. Tuning carburetors is an art form, often requiring experienced judgement to determine if and what adjustments need to be made. Butterfly position is adjusted using the idle set screws fig. Holley doesnt machine this surface on all carburetors, so when you disassemble your carb, look for a lip at the top of the primary or secondary metering block mounting surface. Useful sniper efi information holley performance products.
Bookmark file pdf holley 4150 tuning guide holley 4150 tuning guide holley carburetor tuning guide 4150 carbs part 1 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. Ive read a dozen posts and also the holley advanced tuning program download, but i just want a good video to show me from starting and driving the car, to logging data and saving onto sd card, to uploading to holley software and making. The mechanically operated, double pumper carburetors seldom come with an electric choke. 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 street, strip, supercharging, or race applications. Holley 2091 instructions readdownload universal carburetor throttle solenoid bracket for holley 4160 2058 transmission kickdown spring and bracket with 2 mounting holes holley 2091 tuning, stepbystep instructions, detailed tuning guide, packaging also parts.
Nov 30, 2015 holley has been in the carburetor business for over a century, and has mastered this art form. Correct any sticking or binding conditions before proceeding. How to adjust tune holley carb carburetor tutorial oct 23, 2015 how to adjust tune holley carb carburetor tutorial instructions jegs high performance for the latest racing news, videos holley 4776c 4150 double pumper 600 cfm 4 barrel carb. How to adjust the air mixture for a holley carburetor it. Some older holley model 4160 carburetors use a balance tube. Technical information bulletin the corvette restoration page.
New 31401 this tech paper will discuss basic setup and tuning of holley vacuum secondary carbs for optimum street performance and drivability. Installing the fuel pump in the tank results in quieter operation, less chance of cavitation and a reduction in pump temperature. This window contains a directory tree of each parameter within the config file. Holley 4160 installation instructions pdf download. I did my best to create a short holley carb tuning series for my fellow holley carb guys. Choose the config file you want to use for importing. Figure 1 carburetor torque sequence all holley carburetors note. At both the front and back of the body is a single float bowl. How to tune your carb like a pro carb tuning tips hot rod. Yours is the 454 iirc so the jets etc wont be the same as mine, but if you get the list number off the horn of the carb holley will tell you which power valve and jets the carb was shipped with. Good discussion from the mts series on the operation of holley carbs. Before you begin to tune your carburetor for your particular vehicle, you must get a. Holley products for gms popular ls engine are dominating the ls scene as well.
Tuning and log view software user manual holley performance. The manual is in two formats regular html pages with jpeg images of the scanned pages and pdf files. Singleplane manifolds tend to favor upperend power at higher engine speeds. Before you begin to tune your carburetor for your particular vehicle, you must get a feel for your vehicles performance so that any changes you make good or bad will be readily apparent. Holley carburetors have idle mixture screws that control the airfuel ratio at idle. If you are in love with the carb then you can always remove the 4 well plugs at the top of the metering block. Dec 11, 2006 im going to ask for a holley carb tuning book for christmas and want to know which one you guys prefer. When tuning the idle mixture, youre actually tuning for the best manifold vacuum. Mortecs holley 4barrel carburetor tuning tips for street.
Granted we dont have pics so i dont know how bad it is but i have a shelf full of those blocks that i use for pratice with modding. Its important to note that the sniper efi system will not fix an engine thats not mechanically sound. Need help with beginners guide to tuning on a holley. Assuming youve got spoton tuning, a carb with vacuum secondaries is easier to live with on a street car. Aug 02, 2017 troubleshooting your holley carb august 2, 2017 wayne scraba fuel delivery, howto and tech tips, news 1 holley carburetors find their way onto countless vehicles, from race cars to hot rods to delivery trucks, and for good reason. It is important that the carburetor be rebuilt and adjusted to the proper specifications before any performance tuning is attempted on the carburetor. Install the carburetormounting studs not provided in the proper location on the intake manifold carburetor flange. How to adjust tune holley carb carburetor tutorial.
These instructions must be read and fully understood before beginning installation. The basics of jetting a holley carburetor racingjunk news. Free carburetor repair manuals mikes carburetor parts. Careless idlespeed adjustment is the carburetor s number one tuning problem. 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. Idle circuit mods for high duration camshafts part 1 of 2. Below are also some helpful holley efi videos to prevent some of the common installation errors holley tech sees often with. The tuning instructions are intended to supplement the rebuilding instructions provided with this kit. In producing these parts, holley prides itself in utilizing the latest technology in a lean environment to provide the highest quality parts at the best value to the customer. Carbon enables developers to take advantage of macos os x features, including the quartz 2d graphics library, an efficient eventhandling mechanism, and multiprocessing support. Download file pdf holley carburetor tuning guide engine. Holley carb setting idle speed correctly thunderhead289. The jets are accessed by removing the fuel bowls on each end of the carburetor.
If you know enough to be dangerous when tuning your carb, but not enough to get it right, you need to read this. To tweak one of the base tunes follow holleys section 3. Now, holley efi is dominating the performance world as well as our products for gms ls engine. Theyre the standard of performance, and without question some of the most popular and easily tunable. The holley facility holley manufactures high performance carburetors, manifolds, superchargers, water pumps, throttle body fuel injection and fuel pumps for street and race applications. This carburetor is for use on motor vehicle applications only. Its finally cooling off here in florida and i can work on my car again. Holley carburetors powered every monster energy nascar cup team and nearly every nhra prostock champion for four decades. If this decal is not available, find a service manual that references your. I want to look at everything on the laptop before even attempting to change anything. 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. Sniper help file pdf reader holley performance products.
Place the new carburetor flange gasket, provided with the carburetor, in the proper position on the intake manifold. Carburetor essential tuning and setup tips fourbarrel fundamentals twelve essential setup and tuning tips for the classic holley 4150series carburetor. Later they manufactured carburetors for both street and racing applications such as the holley double pumper and dominator. Rebuild stepbystep july 16, 2017 by muscle car diy if you plan to disassemble a carburetor, it should be done with the carburetor removed from the intake manifold and placed on a clean workbench. Shouldnt i be setting the airfuel ratio of what i want first then letting the computer tune the grid.
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. Whether youre a carb rookie or an experienced enthusiast, you can tune, repair, and select the proper carb for your vehicle. Tuning a carburetor equipped supercharged engine whenever people see a carburetor equipped supercharged engine in a hot vehicle, they cant help noticing how impressive it looks, and they wonder how much power it produces. May 19, 2017 if youre an advanced tuner, you may elect to build a base tune from scratch. Most performanceoriented holley carbs have jets on both the primary and secondary sides. How to adjust tune holley carb carburetor tutorial instructions. You take the engine cubic inch and multiply by the maximum rpm and divide by 3456. Now, holley efi products power these cars and are dominating the performance world.
Tuning and assortment kits holley performance products. But they also see an engine they think is almost impossible to tune, is not very reliable, and will overheat at the drop of a. Instruction manual to download this manual or others. Improperly set idle mixture screws are often the reason for carburetor symptoms such as hesitation, rough idle, backfire, stalling, hard starting, engine surge, and more. This brawler carburetor has not been submitted for emission testing, therefore it is not c. The body of the carburetor is the large, squareshaped center section of the carburetor. Holley offers a variety of fuel pumps, hoses and accessories to complete your installation. Place the carburetor on top of the flange gasket on the manifold. Sounds like someone may have tried to re jet the carb for more power. David vizards how to super tune and modify holley carburetors. How to tune a 750 double pumper holley carburetor it.
You will need to know the basics about how to work on your holley, and a book or two will really help a bunch, because of the pictures and part numbers in them. Mts series video on holley 4barrel carburetor youtube. Holley carburetor tuningcalibration kits 36182 free. Holley does a pretty decent job of supplying a readytorun carb, so the jetting, pump cam, shooter sizing, and spring rates are usually pretty close. Setting the idle mixture to the highest vacuum can be achieved using a vacuum gauge connected to the constantvacuum port of the carburetor base plate to. However, sometimes a little more finetuning is needed because the customer has a fairly radical street setup with a big cam with lower than normal intake vacuum, or the carb is not properly sized for the engine it is being used on. Failure to follow these instructions, including the pictures may result in subsequent system failure. Idle mixture needles are found on the primary metering blocks. They havent changed a whole lot since then, so its still mostly applicable to. Holley and other manufacturers offer a wide array of single and multiplecarb manifolds. Introduction your edelbrock performer series, thunder series avs and avs2 carburetor were calibrated using edelbrock performer, performer rpm, and torker ii power packages.
Refer to your vehicles service manual for information on the proper installation and adjustment procedures. Twelve essential setup and tuning tips for the classic holley 4150series carburetor. Fine tuning the carb in this manner will improve partthrottle operation and should eliminate that annoying offidle stumble. Assuming its the 4160 2 12 turns should be the initial setting on the idle screws. The carb file extension is associated with apple mac carbon, a procedural api for developing mac applications. Theres a lot more to learn about setting idle mixture than just turning a couple of screws. We also tried a 350 chevy equipped with a longduration cam and a holley 750cfm 03310 vacuumsecondary carb. The dash features a 7 low glare, high brightness, high contrast, full color touch screen for easy viewing even in full sun, plug and play connection to all holley efi. Free carburetor repair manuals manuals are downloaded as pdf files. Holley carburetor tuning guide 4150 carbs part 1 youtube. Holley carburetor preparation and tuning guide muscle car diy. Install a suitable manual choke cable, such as holley pn 45228 and choke mounting. In this video we take a in depth look at the idle circuit. If your carburetor is so equipped, please contact holley technical service.
If you find a lower price on the same item, change the price and buy. Holley carburetor tuning how to video v8tv from the. Download manuals for carter, holley, autolite, motorcraft, rochester, stromberg, solex, marvel schebler, zenith. The only modifications i found tell you its strictly for a race vehicle, not a street rod. The carburetor metering was developed on edelbrock engine dynamometers, chassis rolls, and a variety of development. Holley performance carburetors are equipped with a fuel bowl that is designed either for a center pivot or a side pivot float.
Jul 16, 2017 which intake manifold should you choose. Early versions of the sd card contents included an instructions file. Were going to explain how to properly check, adjust, and modify the idle circuit. 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. Everything you ever wanted to know about holley carburetors is included in this twohour dvd includes 3d virtual tours, exploded views of actual carburetors, step. If you change one idle mixture needle, you must change the other idle mixture needle by the same amount. An externally adjustable needle and seat assembly is used so that the float level can be easily adjusted without the need to disassemble the carburetor. It can and will also alter the shape of the main well and give you tuning fits. Turn the screws clockwise to open the butterflies, or counterclockwise to close them down.
Jul 22, 2015 here, jeff schwartz of schwartz extreme performance takes us inside the holley carb. To preserve warranty, these instructions must be read and followed thoroughly before and during installation. Some are very large and might take some time to download, depending on your internet connection. I was disappointed but if you dont want to go through the hassle of calling holley and waiting a long time for tech support, then i guess. This manual will discuss the special points and unique features of the carburetor, and the correct procedures for proper installation and tuning.