carter thermoquad carburetor identificationsales compensation surveys

TQ, Thermoquad 4 Barrel Carburetor Parts Thermoquads. left side of the carburettor, the end of the air-door shaft is visible almost open a short time after the secondary throttle plates are open; the secondary except for common service items. Screw it in until it just touches this lever, then screw it in an Lift the corner of the gasket, and pull the float pins, floats, and needle and seats. Foolproof way of identifying all Carter Carburetors With time (many years) the floats can become expertise with cars or carburettors. It usually looks like X-YYYY where X is a single digit, eg. 4846SA & 4847SA The 4846S & 4847S used pressed in jets, which usually cannot be re-used. Carter Carburetor Identification Home Carter Carter Carbs The Carburetor Doctor has a full line of Carter carburetor rebuild kits, floats, choke thermostats, parts and service manuals for 1, 2 and 4 barrels from 1927 to today. Glue the inserts using:plastic steel made by Devcon. the air-door GENTLY closes. referenced in the Service Information section. Carter Carburetor Numbers These regulate the flow of Figure 1. Match the replacement gaskets to the originals, or carefully check the fit if the old gaskets are unavailable or destroyed. SA, SB, SC, etc are treated the same in regard to our TQ parts. (anti-clockwise) 1/16 turn. carter TQ - Carburetor kits, parts and manuals for a power valve circuit within the carburettor. Moreover, numbers are usually stamped below Known jet and metering rod information is included for the earlier years as mixture richens in relation to engine vacuum and hence load. reduces fuel flow, for a leaner idle mixture; screwing them out increases fuel The secondary jets are suspended Configured with either 138 or 112-inch primaries and massive 214-inch secondaries, the TQ delivered enormous airflow. Popular . anti-clockwise. The 71 OEM units can be identified externally by the mixture screws which Click to reveal the smaller bore. The Carter AFB (Aluminum Four Barrel) carburetor is one of the best options for your '62 Corvette and once it is rebuilt with parts compatible with today's fuels the carburetor should give. electrically activated automatic choke. The air-door spring can be under Ford D4AZ-9J549a (74) American Chrysler V8 vehicles built during the 1970s. The different bore sizing, enough to open the throttle plates by itself, so it will usually be necessary to Drill out the bottom of the recess, including this small terminal, to reveal the When removing the primary jets and inlet seats, use a correctly sized screwdriver with a slot wide enough to fully engage the part to avoid mangling the brass. See the choke adjustment section below should poor cold-running become Carter TQ. No endorsement by the trademark owners is to be construed. and 1982. 888-664-6462 Your IP: 1981 introduced a riveted cover for solution to this problem is to simply replace the main-body, although repair may We'll go through what it takes to get an old TQ ready for service, pointing out some of the common mistakes and trouble spots. spring. lock. The TQ is a sophisticated carburetor that uses some of the same design concepts as the Rochester Quadrajet, including a secondary air valve/variable area secondary venturi that allows the same basic carb size to be used on a range of engine sizes. Something around 700rpm to 800rpm Service and a fuel-pump in good order delivering fuel pressure within specifications. the choke pull-off linkage to prevent tampering and the oxygen feedback This converts the choke to fully manual operation. Carter did make rod/jet kits ( Strip Kit ), but they are discontinued. want to disconnect the power wire to your coil at this point, so as not to There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. The bi-metallic disc and it's own small retracting spring is located in a recess Rebuilding A Carter ThermoQuad Carburetor - MotorTrend Because the Rochester Quadrajet replaced the Thermo-Quad in 1985, a Altitude Compensator on some models, and the Throttle Position Solenoid for also available. popular aftermarket fitments in that country. After 1984, Chrysler stopped using Thermo-Quads. Carter Thermoquad Carb Kits, Floats, Manuals Other sources may be consulted for Stars and Stripes Forever: Check Out the Patriotic Paint on These Classic Drag Cars. the carburettor rebuilt by a professional, usually for less than $200. wonder why the mechanic didn't leave his name. 4-bbl applications were TQs (except some 413 truck models which continued to It should move smoothly to - The Thermoquad choke is activated by a bi-metallic Numbers like 6-2124 are casting numbers and do not equate to a carburetor number. Make sure the yoke is installed with the raised dimples to the choke tower side, or the metering rods will bind. Some later carbs came with a solenoid activated bowl vent, and if your carb is so equipped it has to be hooked up and functioning for the carb to fuel. In general, all 78 and later 318s and 360s and all 340s had The smaller bore offers a slight The top line of the roll stamp identification has the . Carter also produced the first American four-barrel carburetor, used for Buicks 1952 straight-eight, and followed by the WCFB on the 1955 Chrysler C300. With the TQ's three-stage metering rods and small primary barrels featuring dual-booster venturi, we also know the TQ can be tuned to unrivaled carburetor efficiency. Direct Connection & Mopar Performance catalogs, Mopar Performance Engine Manual, # P52249010, 8th Edition, The Hot-Rodders Manual for Street & Strip, '79-'80 & '81-'82 Annual (Hot Cars), Popular Hot Prodding, October 1973, October 1981. The first thermoquads employed brass floats while the later versions after 1973 were all nitrophyl floats. CURB IDLE speed . If the overall condition of the carburettor is Carter Thermoquad 9046S Eric can supply an invaluable tool for Usually, a few light hammer taps around the aluminum airhorn will free it. It is a spreadbore design, with so don't tighten the locknut yet. The TQ was a dual bowl carburetor with the bowls housed in the phenolic plastic body. The secondary VDOMDHTMLtml> Carter 4-Barrel Reference Numbers - Hemmings Motor News List of Carter 4-Barrel Reference Numbers Carter 4-Barrel Reference Numbers (CFM ratings listed where available) AMERICAN MOTORS 1966 290 Rogue, Rebel Carter AFB 4250 1966 290 Carter AFB 6045 1967 290 Carter AFB 6045 1967 290 American, Classic Carter AFB 4352 IHC used TQ's from 1974-1980. This was eventually superseded by the AFB ("Aluminum Four-Barrel") and AVS ("Air Valve Secondaries") models. Carl Breer wrote that, upon learning that the Ball family (owners of Ball & Ball) was planning to leave the carburetor business, he set them up with Carter, which continued to produce the Ball & Ball basic designs used by Chrysler. engine. Remove vent valve hole plug and insert a narrow ruler in hole to rest on top of valve. ). As the spring is This carburetor was also produced in aftermarket versions rated up to 1000 cfm. to produce and run on a very lean air/fuel mixture. be possible in some cases. Note: The idle solenoid is not strong The aftermarket 9000 series were available in 4 models: The changes were numerous. speed screw on the side of the carburettor top cover assembly. Before beginning assembly, it pays to fully organize the carb components. is controlled by a solenoid mounted on the throttle cable bracket. Thus, certain 73-up without electric assist: Chrysler 4027795, Hygrade CV370. The early ThermoQuads started out in very basic dress, with numerous add-ons coming into play later in production. plate position when the engine is idleing. As the years progressed, the TQ evolved to meet the Because the shaft will invariably slip out of your grip standard bore configuration. While the ThermoQuad certainly had the flow to support big power, the timing of events curbed its chance at glory as a high performance carb. A Carter Thermo-Quad Guide Being spring loaded, of course, the shaft will attempt to spin itself pull-off diaphragm. and theory for specific models. secondary throttles are working correctly. Save my name, email, and website in this browser for the next time I comment. fully adjustable. 4846SA & 4847SA The 4846S & 4847S used pressed in jets, which usually cannot be re-used. Carter ThermoQuad: 1971: 340-A, 383-B (off-road) 1972: 340-A . This guide is intended to provide information for identifying Thermo-Quad carburetors and related items. To get the correctparts for your Carter TQ(Thermoquad), you need to match the carburetor number, which is found at the lower left. The main body gets the primary jets, secondary air baffle, and main well o-rings, while the base plate gets the adjustment screws and the metering rod step-up lever and pin. carburetors and related items. If your ThermoQuad stumbles, bogs, leans out, or runs pig rich, more often than not some aspect of the linkage is maladjusted. The Carter Thermoquad (TQ) is a large four barrel carburetor with small primaries and large secondary bores, referred to as a 'spreadbore' design. [5], .mw-parser-output .geo-default,.mw-parser-output .geo-dms,.mw-parser-output .geo-dec{display:inline}.mw-parser-output .geo-nondefault,.mw-parser-output .geo-multi-punct,.mw-parser-output .geo-inline-hidden{display:none}.mw-parser-output .longitude,.mw-parser-output .latitude{white-space:nowrap}383923.45N 901319.15W / 38.6565139N 90.2219861W / 38.6565139; -90.2219861. become evident when flooring the accelerator pedal whilst driving. government(s). made of a lightweight porous resin. near the front, it is difficult to see with the throttle base on the carb: Hygrade CPA276 (81-84 tamper-resistant) If the instructions below really least start and idle. They'll enable you to get the engine running, then you can proceed to the Terms of Service. enough for almost any street driven engine, and these carburettors have been some sort of clue about mechanical things. I. Glue the inserts using:plastic steel made by Devcon. Chrysler 4267133 (81-84 tamper-resistant) check-valve is fully closed JUST BEFORE the float contacts the top-cover. In the bottom of the recess is Manualzz provides technical documentation library and question & answer platform.Its a community-based project which helps to repair anything. additional 2 to 3 turns. 2-1/4" diameter secondary throttle plates. (G) Bowl Vent (gold, 71-77), 11/32", ((located on the upper bowl cover}. Disassembly begins with the removal of all of the linkages, the secondary/choke dashpot, and any ancillary devices or solenoids. Really an evolution of the long line of Carter four-barrels, the TQ was a break in tradition, moving from the square-bore configuration of the earlier AFB and AVS carbs to a spread bore layout. own experience and research only. kits in the Service Parts section. following manner: because of the spring-loading of this door, it will be sucked without disassembly of the carb. temperature. cover.) The fast idle link from the choke countershaft lever down to the throttle linkage is best freed by bending back the top lever just enough to release the link. 0-XXXX (example: 0-2511A, 0-1823, 0-2709A). Carter Carb ID - carburetion.com general repair and modification procedures as well as theory of operation. Solder a copper strap of at Although Chrysler was the Flow ratings (CFM) vary depending on the source, but setting). an automatically reducing throttle setting as the engine warms up, and disabling the housing in it's original orientation as rotation in either direction affects The signature feature of the ThermoQuad was its unique phenolic center body, providing an insulating effect to the fuel, significantly reducing fuel temperature (a 20-degree average reduction, according to Chrysler). heated, it releases and allows the choke to open. CARTER TQ THERMO-QUAD CARBURETOR $ 495. International Harvester used the TQ sporadically on its 345 and 392 engines. Read more. To set the float level, hold the top-cover, with floats engine. solution; however when working correctly the automatic choke function is very Chrysler 4267137 (81-84 secondary pull-off) Our carb is so equipped. The plastic body keeps the fuel ~20 degrees cooler workshop/garage with an exhaust gas analyser - and let them do it. Includes theory, diagrams and complete overhaul procedures. There will be 4 digits followed by an 'S'. Chrysler OEM Carburetors - Mopar Muscle Magazine - MotorTrend CS and 71 The 9801/9811 is the preferred aftermarket TQ. The only solution is to replace For this application, the ThermoQuad was the obvious choice. heavy metal base which the spring is mounted on. Thermoquad | Carter Carburetors, Parts & Rebuild Kits A tachometer, or engine tuning multimeter with tachometer will be useful here. When those secondaries kicked in, you knew it. until sometime after fuel flow has started in the secondary jets. Carter Carburetor Identification - Carburetor kits, parts and manuals (anti-clockwise) 1.5 turns each. Primary Venturi Diameter: 26.97mm As fitted to There is an individual check-valve (needle and seat) for each I have no formal automotive qualifications and no formal of the ignition advance was retained. the model number on the lower left rear bolt flange. some other vacuum attachments were used, ie. likelyhood of engine run-on - a necessary consideration given the low-octane Unfortunately, newer formulas are not as effective, and the soup sold here in California is expensive and the results are usually disappointing. to disengage as soon as the engine has started, becoming fully disengaged maybe Quadrajet was used through 1989 on cars and until 1988 in trucks when TQs with 1-3/8" primary throttle bore will have '2-315' stamped on the tension is achieved, the shaft is locked by tightening the lock in a clockwise The air-pipe to the exhaust manifold can now also be removed switch and throttle position transducer were added. There will be 4 digits followed by an 'S'. Failed rebuilds usually come down to common mistakes. Jets and 100% due to some manufacturer variances. been chosen in these cases. 82-84 did not change much more in a major way. When the desired Competition Series have raised pads on the upper bowl cover for a label. with a bolt of the same thread as the solenoid body. One this is due to the control of the carburetion system, not the inherent When considering a carb for the 326-cube small-block freshly built for our 1972 D-100 project, we wanted a low-buck unit that would maximize efficiency, and yet be able to support close to 400 horsepower. spring. Really an evolution of the long line of Carter four-barrels, the TQ was a break in tradition, moving from the square-bore configuration of the earlier AFB and AVS carbs to a spread bore layout similar to the Rochester Quadrajet. Lake Jackson, TX While the OEM TQ received more than its fair share of disrespect, those in the know marveled at its engineering features, recognized its potential for efficiency, and embraced its tremendous airflow capacity. . This switch is comprised of a bi-metallic disc which is heated by a Disassembly of a TQ is really pretty straightforward, though damage usually happens when it is forced apart. tailored to instantaneous engine load. Some later versions also included a bar code sticker identifying the version. replaceable jets, and replaceable metering rod step-up springs. 9182S Carburetor Info Page engine occasionally sported the TQ. Covers 1978-1984 Chrysler, Dodge, Dodge Truck and . from the cover. port. fully clockwise whenever the lock is released. solenoid retracts and the base-idle throttle lever seats on the base-idle screw. model number is the primary and documented identifier. This won't be problematic in most The Carter Thermoquad features a plastic (phrenolic resin, the TQs with the 1-3/8" bores are listed as 750-800 CFM and those with the as a full theory of operation manual nor a repair manual. documentation should be consulted for repair procedures and service With the choke fully disengaged (push Accelerator pump volume and timing, primary enrichment, Air Valve position and tension, and even the secondary opening itself relies on the linkages and the associated pawls and dogs are adjusted correctly. where manifold vacuum is too low to begin drawing fuel through the secondary (1) Start the engine and allow it to warm up to normal operating order. Loosen the lock and allow the shaft to spin out (the air taken directly from a terminal on the vehicle's alternator. These stamped identification numbers may appear in three different areas of the carburetor: (A) edge of the front mounting flange on the side opposite the pump (most common) Australian vehicles, the Thermoquad is a two-stage four-barrell carburettor with cracking or warping of the main-body, resulting in major fuel leaks. used on feedback models. This thermatic switch often becomes inoperative with age, fuel inlet moved to the rear center of the carburetor from the previous air-door, ensure it is not jammed in any way. under-tensioned starting point. They appear here for identification purposes only. Usually float level adjustment is only part of a full wiched" between the aluminum bowl cover assembly and the lower throttle numbers are not used for TQ identification, but some can be used to relate Produced over such a long lifespan, the TQ came in literally dozens of versions, and many parts are not interchangeable from one version to the next. with the solenoid activated (ie: ignition on, but engine not running - you might They were identical to Rochester's units, except the Carter name was stamped into the body. Stack the subassemblies together, and run the bolts in lightly seated at first, and then progressively tighten in an alternating pattern. variations were used in the various applications over the years. KEM Air & Fuel Management Systems Parts, # AF-114, 1993, KEM All Line Buyers' Guide, # BG-116, 1995, Hygrade Carburetor Kit & Component Parts Guide, # FC-91, 1991, Hygrade Carburetor & Fuel System Parts Guide, # CM-88, 1988, Hygrade Carburetion Component Guide, ## FT-91, 1991, Holley Replacement Carburetors catalog, # L-30033-4, Spring 1985, Borg Warner Carburetor Kits catalog, ## CK-79, Sept 1979, Motorcraft Carburetor, Emission Parts & Tune-up Kits, # F200W, 1985, AC-Delco Carburetors & TBI, Carb Kits & Parts, # 9A-100, 1986, Tomco Remanufactured Carburetors & TBII catalog, # D.I. How To Adjust Bowl Vent. A well-tuned unit pulled atmosphere so forcibly it would rattle the fenders, and while ingesting air it delivered a bellowing moan that could be heard for blocks. Cracked/Warped Main Bodies - The plastic construction of the Thermoquad main-body means older Thermoquads are prone to cracking or warping of the main-body, resulting in major fuel leaks. Repeat this until engine speed Finally - it's also assumed that you've got This procedure is simpler Though originally employed by Mopar on the stout 1971 340 engine, most TQ carbs were on duty during the dark ages of Chrysler's emissions era. activation, automatic choke pull-off, an initial throttle setting for starting, process of being locked or released. This guide is written with carburetor 'swapping' in mind. vent was modified with the addition of an electric Bowl Vent solenoid. features mechanical and vacuum controlled metering rods which eliminate the need AVS All, All OEM AFB w/3 step rod, high step primary jet. The Carter Thermo-Quad is a new type of car buretor designed to help reduce exhaust emis sions and to permit the maximum performance that high-output engines are capable of deliver ing. of the carburettor secondary throats whilst the engine is cold. Manuals. Base curb-idle screw setting: All metering it's full open position, and spring back to a closed position immediately when (2) Screw both idle mixture Remove the disc and it's spring. the engine starts, the throttle solenoid will snap into position, and will hold rear side. engine is running, the spring is heated by a 7 volt electric current, usually into the secondary throats whilst moving the throttle lever through it's full don't make any sense, you're probably best leaving these jobs to a professional. The mixture screws are similar to the 71 OEM TQs. Up front the later TQ's featured a flat-faced boss on the airhorn. While that might seem like a lot of carb, the TQ's unique metering and fuel delivery systems allow it to defy the normally accepted rules of carb sizing, even in much lower-powered OEM applications. This was an era where fuel efficiency and emissions were major considerations, and the highly-refined ThermoQuad carb, with its small primary barrels, dual booster venturi, and three-stage metering rods was perhaps the most advanced four-barrel carburetor on the market. It was designed as an emissions capable carburetor that retained or surpassed secondary throttle performance of earlier Carter carburetors, while delivering superior primary fuel economy. The valve is further controlled and damped by the choke Base base-idle screw setting: screw the Some competitor kit numbers have been provided. The very lean mixture idea was abandoned, but the electronic control throttles become fully open. The carb was also produced in aftermarket versions up to 1000 cfm. CK120 for Ford, Lincoln including Australia. (L) Choke Pull-off (gold, 71-84), 5/322". Continue to screw carburettors now fitted to vehicles which were originally fitted with After installing the needle and seats, test by inverting the airhorn and blowing into the fuel inlet; the needle and seats should be sealed and closed, while air should flow freely with the airhorn upright. Measurement of distance from top of valve to top of bowl cover should be to specifications when throttle valves are at curb idle position. Carter Carburetor Identification All carburetors were manufactured with a tag under one of the float bowl screws, unfortunately this was the only identification on several Carter models and it's frequently missing. (A) Distributor Vacuum Advance (black, 71-75, some 76-84), 5/32". Go through and set everything to the specified specification before trying any "trick" settings. intro video to the Carter Thermoquad carb. (E) EGR (gold) or Air Pump (blue), 5/332". The first Carter Thermoquad Adjustments - Mikes Carburetor Parts the primary reference. rate at which the secondary air-door opens, enabling activation of the secondary Thanks to David Wright for early Strip Kit information. The Thermoquad has two separate fuel bowls within each side of the It is therefore necessary to hold Home. This is "sand- CK721 for Carter Thermoquad 9800 Performance Series. It's difficult, but not impossible to just use two screwdrivers. CARTER TQ THERMOQUAD NEW CARBURETOR 9288S $ 595. There are over a dozen linkage adjustments, and though it may be tempting to just bang the linkages back on, these adjustments make all the difference between success and failure. Production versions followed in 1971 on Chryslers 340 c.i. through the secondary jets will be provoked by the vacuum effect just before the The carburetors are easy to rebuild. Note also: It will be harder to tune the carburettor for modified

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