Throttle body fuel injection initial calibration of the tbi disclaimer. Throttle bodies airfuel delivery full throttle speed. The fuel body supplies the fuel, while the throttle body controls the air supply. If the vehicle has an electronic throttle body, a sensor on the accelerator sends a signal to the powertrain control module pcm to determine the right throttle position and then commands a motor on the. Fuel injection systems throttle body injection style. Cable from gas pedal to throttle body affects under. It will pump 30 gallons of gasoline per hour at free flow, and will produce up to. Throttle body injection tbi uses a unit that looks a little like a carburetor. It seems if you want to use a dominator ecu with throttle body injection, then the terminator throttle body is your highest horsepower choice from holley.
Torque the throttle bodytointake manifold nutsbolts to 18 lbs. Fuel injection conversion using a gm tbi efi system. In some instances it is necessary to seal these with silicone to provide a positive seal. It is designed to utilize the vehicle on board computer ecm and all the gm preferred relays, sensors and other accessories to operate the fuel injection and ignition as originally designed by the factory.
For the last time, throttlebody fuel injection isnt a carburetor. We specialize in high horsepower forced induction engines. The injectors spray fuel into the top of the throttle body air horn the tbi fuel spray mixes with the air flowing through the air horn. Fuel is delivered to the throttle body injection system by an electric fuel pump located in the fuel tank. Throttlebody fuelinjection systems use what type of inject. Fast is the leading developer of electronic fuel injection systems, efi components, intake manifolds, tuning tools for high performance and street applications throttle bodies javascript seems to be disabled in your browser. Throttle body general instructions pdf book manual. All books are in clear copy here, and all files are secure so dont worry about it. What are potential throttle body injection options for over 600 hp with the dominator ecu. Then we will adjust the throttle plate for minimum idle. Read online throttle body general instructions book pdf free download link book now. There are basically two types of efi designsthrottle body and multipoint.
The bosch djetronic electronic fuel injection system is composed of 3 major subsystems. Install the fuel injector on the throttle body if there is injector seat on throttle body. Pressurized fuel is strained through screentype filters before it is introduced into the engine through a pair of injectors located above the throttle bodys venturi and throttle plate. Electronic fuel injection system electronic control unit instruction. Even port fuel injection has a throttlebody, its just that with port fuelinjection the fuel is not injected at the throttlebody, its injected at the back of the intake valves. After seeing about 8 or 10 installs now i can say that only one had a bad ecu.
I have replaced the computer and the injectors are ok. These systems suffer from the drawbacks of being mechanically complex and having poor response to backing off the throttle. The throttle body injection system used by chevy was a natural progression from the carburetor previously used. Ecu can then be used for lsx, boosted, nitrous, and many other applications in the future as you desire. A lot of people mistake throttlebody fuel injection for a carburetor. Wade wilcox, owner of injectioneering, has been actively engaged in the engine fuel delivery engineering and modification business for many years. Positive fuel trim means the computer is adding extra fuel too lean. Aftermarket throttle body conversion kits are a bit twitchy. Caution to reduce the chance of personal injury andor property damage, the following instructions must be carefully observed. On some models, the filter is part of the fuel pump itself, on others, it is located in the fuel line, and still others locate the filter at the carburetor or throttle body inlet. Fast fuel injection systems throttle body injection. Injector pressures range from to 16 psi low pressure system or 35 to 60 psi high pressure system, and are kept. Both have a throttle body whether you have one or the other. They released a new 2x4 terminator injector harness that would allow a second terminator throttle body to be connected via the main harness.
Pdf fuel efficiency and emission characteristics are two main concerns that must be addressed. And for those engines, the spp techs have found that a good range of throttle body size to work with is 48mm up to around 52mm. Provides great starts, drivability, and fuel economy. Gm luminasilhouettetransport apvs 19901999 repair guide.
Early last year, it looked like holley was going to followthrough on plans to make building a dualquad throttle body engine easily achieveable. Install new orings onto the fuel lines and connect them to the throttle body. Tbi fuel injection is a type of fuel injection system where the fuel is injected into the throttle body. Critical components used in manufacturing the electronic throttle body, including the housing, throttle plate, position sensors, throttle actuator motor and throttle plate return spring conform to precise o. This pump supplies fuel pressure in sufficient volume to meet the engines fuel requirement through all load conditions. Reduces the stress of launching applications or checking websites in prescheduled manner. This was the gas leak that i had and fixed it have gas to throttle body.
Carburetor to throttle body injection ford thunderbird. Injectioneering honda cfr 450 throddle body fuel injection. Fuel injection is the introduction of fuel in an internal combustion engine, most commonly. Pdf influence of fuel injector position of portfuel injection retrofit. Single point injection system pdf injection system by having the same amount of gasoline. Buy a 2007 ford escape throttle body at discount prices. Choose top quality brands a1 cardone, standard motor products. There are many others that will do the same thing but the 1227747 is most well known and documented and will be the basis for this article. This site is like a library, you could find million book here by. Highly experienced in engine tuning via many platforms such as holley efi, hp tuners. Pdf sensors system,advanced fuel injection system,computer. Pdf advanced engine performance diagnosis, fuel injection. A throttle body injection tbi system has a single throttle body which contains one or two fuel injectors.
Cd for tuning software downloadable from our website. Download throttle body general instructions book pdf free download link or read online here in pdf. Learn what tbi fuel injection is, its benefits and drawbacks, and tips for increasing the fuel efficiency of throttle body injection. Efi throttle body intake elbow 4500 fits 8695 ford 5. If this is the case make sure that the seal is positive between the manifold and the adapter plate. Singlepoint fuel injection is referred to by a handful of different names, including throttle body injection tbi, central fuel injection cfi, egi, and pgmcarb. Was told being 1991 cannot hook up a tester 1996 on is all they had. Since an oetype fuel injection system may be somewhat limited in terms of performance and definitely. The throttle body fuel injection system, or tbi as referred to by gm or cfi by ford, works using a single or pair of injectors. A throttle valve, operated by accelerator pedal, is located at the mouth of the. Throttle body injection unit repair guide autozone. I explain how the throttle body injection system works on my 1994 chevy truck.
He has developed proprietary techniques for perfecting fuel delivery systems for all types of vehicles. It features a microcomputer to control the valve opening quickly and precisely, keeping the engine torque at a constant level when adjusting the airfuel. Experimental works comprised one throttle opening position with various. Singlepoint injection spi uses a single injector at the throttle body the same. In a multipoint fuel injection mpi system, each cylinder has its own individual fuel injector. If it doesnt start, and you can bypass the ignition box that is a good place to start for a nostart. Available for almost any make of engine with 12v ignition. Tbi systems were used in the late 1980s and early 1990s.
For example, can the dominator ecu control the fast efi throttle body. In addition, an idle air control iac assembly, mounted in the throttle body is used to control idle. With a fully automated removal, the part was carefully monitored with cavity pressure control, and weight analysis, which would immediately reject the part if there was a slight alteration in. They either want to retain an old school carburetor approach or upgrade to electronic fuel injection efi. Have changed sensor in distributor, took out computer took to truck same model plugged in cranked fine. Eight stack throttle body systems are fuel injection platforms pairing retro looks with modern performance.
Throttle body components holley performance products. Automotive electrical and engine performance 7th edition edit edition. Data logging software winaldl is a free download the datalogging program, such as winaldl, will get the information. Throttlebody injection definition, a fuelinjection system in which an injector throttlebody injector delivers fuel to a central location within the intake manifold of the engine. How to clean chevy throttle body injectors it still runs. It is located on the left front corner of the tbi body, just ahead of the throttle arm. Mechanical throttle body electronic throttle body cam cam hardware design is on critical path to deliver drive characteristics. Builders of custom street rods and resto mod vehicles are generally divided into two camps with regard to the engines fuel system. Tbi fuel injection conversion using a gm tbi efi system.
With the injectioneering throttle body modification, the throttle. One of the most popular efi conversions to older chevy engines or any engine for that matter is the gm tbi system using the 1227747 ecm. In engine rotation speed over idol speed, fuel injection is stopped at idle throttle position. Fuel injection basics car obd diagnostics, ecu chip. Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector all diesel engines use fuel injection by design. An electronic throttle body or electronic throttle control connects to the gas pedalaccelerator electronically without the use of cables. Holley 550406 terminator efi 4bbl throttle body fuel. In this article, well discuss the pros and cons of tbi the throttle body injection system tbi consists of two parts, namely, the throttle body and the fuel body. We have many products for your turbo buick v6, turbo trans am, and grand national, as well as all lsx based vehicles such as late model camaro, firebird, and corvette.
Application of an electronic fuel injection system to a single. Gas engines can use gasoline direct injection, where the fuel is directly delivered into the combustion chamber, or indirect injection where the fuel is mixed with air before the intake stroke. Any component which does not meet autolines rigid standards is replaced with parts which equal or exceed o. Have no volts at the two injectors in throttle body. Use a backup wrench and tighten the nuts to 20 lbs. One type is called throttle body or central fuel injection. A bump up in throttle body size is definitely going to be an improvement. Les moteurs et aeroplanes antoinette antoinette engines and aeroplanes pdf in french. The throttle position tp sensor is a variable resistor used to convert the degree of throttle plate opening to an electrical signal to the computer control module.
Styled after traditional weber carburetion systems of the 1960s, the eight stack system gives you all that classic wowfactor without the need for boxes of jets and calibration changes for weather, temperature and altitude. An efi system so easy and powerful youll think its alive. Injection molded throttle body a custom designed throttle body using high temp ultem to create a precise flowing part for one of our automotive customers. Precise airflow control, accurate engine control, and extended service life is what youll get with this premium electronic throttle body by hitachi.
1240 290 118 642 749 480 827 1148 594 120 1412 862 338 89 909 666 653 1244 1361 522 583 459 1477 253 1437 774 1364 647 1047 942 108 1102 372 619 53 712 1279 715 760 393 816 667 591 255 419 1216 901