Small Engine Carburetors

Carburetors are a component of internal combustion engines that generate a combustible mixture of gasoline and air. Carburetors were used in cars in earlier days, but presently, they have been replaced by the electronic fuel injection technology and are being used in smaller machinery like lawn mowers, chain saws, motorbikes, small boats, and light aircraft. Even though electronic fuel injection technology has more advantages like flexibility, reliability and complexity, its higher cost makes carburetors a better choice for small engines.

The basic function of a carburetor is to ensure the right mix of air and gasoline into the engine. The carburetor comprises of a tube with an adjustable plate called the throttle placed across it. This throttle controls the amount of air that flows through the tube. The carburetor tube narrows down at a place called the venture, where a vacuum is created.

Holley

There is a hole in this narrowing called the jet that allows the fuel to be drawn in because of the vacuum. There are several parts in a carburetor that allow for smooth functioning. The parts are the pilot, pilot airscrew, throttle valve, jet needle, needle jet, air jet, and main jet. Other important parts are the choke, accelerator pump, float chamber, and barrels that help to create the ideal mixture of gas and air in the engine.

Small Engine Carburetors

Carburetors have improved over the years in terms of efficiency and effectiveness. Their emissions standards have are much better and adhere to environmental standards. This is also another reason for the increased use of carburetors in smaller machinery.

There are many kinds of small engine carburetors. The complexity of the modern machines demand greater sophistication in the carburetor design. Float-type and suction-type are the two main categories of carburetors and there are two kinds of float-type carburetors including one-piece and two-piece. Suction-type carburetors have a built-in fuel pump.

The major manufacturers of carburetors are Amal Ltd., Autolite, Carter, Holley, Pierburg, Rochester, Solex, Stromberg, SU, Walbro and Tillotson (small engines), Briggs and Stratton, Villiers, Weber and Zenith. Rebuilt or remanufactured carburetors can also be used in small engines.

Small Engine Carburetors

Carburetors provides detailed information about carburetors, carburetor parts, carburetor tuning, and more. Carburetors is affiliated with Car Transport.

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Classic Car History - 1963-67 Corvette Sting Ray

Specs for 1963-67 Corvette Sting Ray

Engine: OHV 90 degree V-8, 327 cid, 396 cid, 427 cid

Construction: Cast-iron block and heads, single cam, pushrods

Classic Car History - 1963-67 Corvette Sting Ray

Compression ratio: 11:1

Induction: Rochester fuel injection or one/two Carter four barrel carbs

Maximum Power: 250-375 bhp (327 cid) 390-435 (427 cid)

Top Speed: 152 mph

0-60 mph: 5.4 sec, 427 cid

Transmission: Four-speed, all syncromesh manual, optional three-speed manual, or Powerglide automatic

Body/Chassis: Steel ladder frame with two door convertible or coupe fiberglass body

Wheels: Five bolt steel (knock off aluminum optional) 6in. x 15in.

Tires: 6.7 in. x 15 in. Firestone Super Sport 170

Brakes: Drums to 1965, then four wheel discs

Front Suspension: Double wishbone, coil springs, anti-roll bar

Rear Suspension: Semi-trailing arms, half shafts and transverse links with transverse leaf spring

Wheelbase: 98 inches

Length: 175.3 inches

Height:49.8 inches

Weight: 3150 lbs

Quarter Mile Performance: 12.8 @112

Fuel Mileage: 9-16 mpg.

Production: 118,964 including 1963-67

Price: 40 for 1967 Convertible

The 1963-1967 Corvette Sting Ray

The second generation Corvette was the 1963-1967 Sting Ray, not to be confused with the third generation 1968-82 Stingray (1 word). The styling was the expression of many of the styling ideas of new GM styling chief Bill Mitchell. The interior implemented a dual cockpit similar to earlier Corvettes, but updated for the Sting Ray. Starting in 1963 the first hard top coupe was offered, featuring the a two piece rear window design. Bill Mitchell intended for it to form a visual connection with the central raised sections on the hood. The feature was dropped in 1964 because it limited rear visibility. However the 1963 Sting Ray coupe is now the most sought after model of second generation Corvettes.

Like all Corvettes, the Sting Ray's body is constructed of fiberglass panels mounted on a steel ladder frame. Another new feature was the hidden twin pop-up headlights, which not only added style they aided in aerodynamic efficiency. Other styling cues of the Sting Ray include optional side mounted exhaust, a power bulge on the hood (this was wider for the Corvettes that had the big block engine), and absence of a trunk lid (access is from behind the seats). Additionally the Corvette's convertible top folds away completely when not in use and is stored beneath a flush fitting fiberglass panel behind the driver. There was also an optional hard top. The different year model Sting Ray's can often be differentiated by their side vent designs , for instance the 1967 had 5 side vents, the 1965 and 1966 models had triple side vents, the 1963-64 had horizontal double vents.

Sting Rays came in three engine sizes, the 327 cid, the 396 cid and the 427 cid. Horsepower varied between 250 and 435 hp. The 396 engine was only offered in 1965, and dropped in 1966 in favor of the 427. The 1967 L88 427 cid V8 marked the pinnacle of performance for the second generation Corvette. The V8 engines drive the rear wheels through a four-speed manual or a three speed automatic transmission. The Sting Ray also had an alloy clutch housing and alloy-cased gearbox to help with weight reduction and weight distribution. The 1963 Sting Ray was the first Corvette to have an independent suspension. The 1965 was the first to have 4 wheel disc brakes.

The 63 Corvette also had a racing option, the Z-06. The Z-06 was created by Zora Arkus-Duntoz as a purpose built racer. The Z-06 option consisted of a fuel-injected 327 cid V8, 36.5 gallon fuel tank, heavy-duty brakes, heavy-duty suspension, and knock-off wheels. The heavy-duty brakes consisted of drums with sintered metallic linings, power assisted and backed by a dual circuit master cylinder. "Elephant ear" scoops rammed fresh air to the drums and cooling fans spun with the hub.

For 1967, there were four versions of the 427 available. The first version, the L36, cost just 0 more and featured a single four barrel carb, 10.25:1 compression and hydraulic lifters. It was rated at a stout 390 bhp. Next up was the L68 for 5 which featured triple two-barrel Holley carbs (a first for Corvette) and was good for 400 bhp. At the top was the L71 with triple two-barrel Holley carbs, solid lifters, special performance cams, and 11:1 compression which was conservatively rated at 435 bhp. Extremely rare (only 20 were built) was the top of the line L88 for 8 more. The L88 featured new aluminum heads, 12.5:1 compression, and a single Holley four barrel carb rated at 850 cfm that sat on an aluminum intake manifold with a special raised plenum chamber. In addition, you got a transistor ignition and Positraction differential but didn't get a fan shroud, heater, nor defroster. Chevrolet was reluctant about revealing the engine's true potential and officially rated at only 430 bhp, but most experts believed that it in fact developed close to 600 bhp! In all, 9,707 big-blocks were built, meaning that 42.31% of all 1967 Corvettes were 427s. Transmission choices were relatively simple. With the L36 and L68, buyers could choose between the wide-ratio (4) or close-ratio (4) four-speed manuals, or Powerglide automatic transmission (4). The L71 came only with the close-ratio four-speed. Rear end gear ratios ranged from 3.08 to 4.11. Other options included side-mounted exhausts at 2, cast aluminum bolt-on wheels at 3 and detachable hardtop for the convertible for 2.

Stats by year:

1963

Production: 21,314

Coupe: 10,594

Z06 Coupe: 199

Convertible: 10,919

Engines:
327 V8 250 bhp @ 4400 rpm, 350 lb-ft @ 2800 rpm.

L75 327 V8 300 bhp @ 5000 rpm, 360 lb-ft @ 3200 rpm.

L76 327 V8 340 bhp @ 6000 rpm, 344 lb-ft @ 4000 rpm.

L84 327 ("fuelie") V8 360 bhp @ 6000 rpm, 352 lb-ft @ 4000 rpm.

Performance:
327/370: 0-60 in 5.9 seconds, 1/4 mile in 14.9 seconds.

1964

Production: 22,229

Coupe: 8,304

Convertible: 13,925

Engines:
327 V8 250 bhp @ 4400 rpm, 350 lb-ft @ 2800 rpm.

L75 327 V8 300 bhp @ 5000 rpm, 360 lb-ft @ 3200 rpm.

L79 327 V8 350 bhp @ 5500 rpm, 360 lb-ft @ 3600 rpm.

L76 327 V8 365 bhp @ 6200 rpm, 350 lb-ft @ 3400 rpm.

L84 327 ("fuelie") V8 375 bhp @ 6200 rpm, 350 lb-ft @ 4600 rpm.

Performance:
N/A

1965

Production: 23,652

Coupe: 8,186

Convertible: 15,376

Engines:
327 V8 250 bhp @ 4400 rpm, 350 lb-ft @ 2800 rpm.

L75 327 V8 300 bhp @ 5000 rpm, 360 lb-ft @ 3200 rpm.

L79 327 V8 350 bhp @ 5500 rpm, 360 lb-ft @ 3600 rpm.

L76 327 V8 365 bhp @ 6200 rpm, 350 lb-ft @ 3400 rpm.

L84 327 ("fuelie") V8 375 bhp @ 6200 rpm, 350 lb-ft @ 4600 rpm.

L78 396 V8 425 bhp @ 6400 rpm, 415 lb-ft @ 4000 rpm.

Performance:
396/425: 0-60 in 5.7 seconds, 1/4 mile in 14.1 seconds @ 103 mph.

1966

Production: 27,720

Coupe: 9,958

Convertible: 17,762

Engines:
L79 327 V8 300 bhp @ 4800 rpm, 360 lb-ft @ 3400 rpm.

L36 427 V8 390 bhp @ 5400 rpm, 460 lb-ft @ 3600 rpm.

L72 427 V8 425 bhp.

Performance:
427/425: 0-60 in 5.7 seconds, 1/4 mile in 14 seconds.

1967

Production: 22,940

Coupe: 14,436

Convertible: 8,504

Engines:
L79 327 V8 300 bhp @ 4800 rpm, 360 lb-ft @ 3400 rpm.

L36 427 V8 390 bhp @ 5400 rpm, 460 lb-ft @ 3600 rpm.

L68 427 V8 400 bhp @ 5400 rpm, 460 lb-ft @ 4000 rpm.

L71 427 V8 435 bhp @ 5800 rpm, 460 lb-ft @ 4000 rpm.

L88 427 V8 430 bhp @ 5200 rpm, 460 lb-ft @ 4000 rpm.

Performance:
L88: 1/4 mile in 12.8 seconds @ 112mph.

Classic Car History - 1963-67 Corvette Sting Ray
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Carburetors

The carburetor is the part of an automobile engine that converts liquid fuel into vapor. This is mixed with a certain amount of air that allows combustion in the cylinders. All gasoline vehicles have carburetors, including boats and light aircraft. Carburetors are generally found in small engines and in older automobiles, especially those used in stock car racing. Most engines have only one carburetor though most modern engines that have bigger engines or more than 4 cylinders use multiple carburetors.

The history of carburetors can be traced to the development of the wick carburetor by Donat Banki, a Hungarian engineer in 1893. Frederick and his brother built the first petrol driven car in 1896. Then in 1900, they built a 2-cylinder engine using the new wick carburetor. This car was taken on a successful 1000-mile tour, marking an important landmark in the use of the carburetor in automobiles.

There are two kinds of carburetors, downdraft carburetors, wherein the flow of air is downwards; and side-draft, wherein the flow of air is sideways. Most automobiles in the U.S. use downdraft carburetors while side draft carburetors are found more in Europe. Carburetors are also classified as fixed choke and constant depression or variable choke. The variable choke carburetors are generally used in the UK because they are simple in adjustment and maintenance. Carburetor's efficiency depends on its capacity to provide the right mixture of fuel and air under each circumstance of engine operation. The different engine conditions are cold start, idling or slow running, acceleration, high speed/high power at full throttle and cruising at part throttle (light load).

Carburetors

The main parts in a carburetor are an open pipe, which is the carburetor's "barrel" or "throat" through which the air reaches the engine. The butterfly valve or the "throttle", a rotating disc in this pipe, controls the air flow through the carburetor throat, which influences the power and speed of the engine. This throttle is connected to the accelerator of the vehicle. The major manufacturers of carburetors are Amal Ltd., Autolite, Carter, Holley, Pierburg, Rochester, Solex, Stromberg, SU, Walbro and Tillotson (small engines), Briggs and Stratton, Villiers, Weber, and Zenith.

Carburetors
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Carburetors provides detailed information about carburetors, carburetor parts, carburetor tuning, and more. Carburetors is affiliated with Car Transport.

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Small Engine Carburetors

Carburetors are a component of internal combustion engines that generate a combustible mixture of gasoline and air. Carburetors were used in cars in earlier days, but presently, they have been replaced by the electronic fuel injection technology and are being used in smaller machinery like lawn mowers, chain saws, motorbikes, small boats, and light aircraft. Even though electronic fuel injection technology has more advantages like flexibility, reliability and complexity, its higher cost makes carburetors a better choice for small engines.

The basic function of a carburetor is to ensure the right mix of air and gasoline into the engine. The carburetor comprises of a tube with an adjustable plate called the throttle placed across it. This throttle controls the amount of air that flows through the tube. The carburetor tube narrows down at a place called the venture, where a vacuum is created.

There is a hole in this narrowing called the jet that allows the fuel to be drawn in because of the vacuum. There are several parts in a carburetor that allow for smooth functioning. The parts are the pilot, pilot airscrew, throttle valve, jet needle, needle jet, air jet, and main jet. Other important parts are the choke, accelerator pump, float chamber, and barrels that help to create the ideal mixture of gas and air in the engine.

Small Engine Carburetors

Carburetors have improved over the years in terms of efficiency and effectiveness. Their emissions standards have are much better and adhere to environmental standards. This is also another reason for the increased use of carburetors in smaller machinery.

There are many kinds of small engine carburetors. The complexity of the modern machines demand greater sophistication in the carburetor design. Float-type and suction-type are the two main categories of carburetors and there are two kinds of float-type carburetors including one-piece and two-piece. Suction-type carburetors have a built-in fuel pump.

The major manufacturers of carburetors are Amal Ltd., Autolite, Carter, Holley, Pierburg, Rochester, Solex, Stromberg, SU, Walbro and Tillotson (small engines), Briggs and Stratton, Villiers, Weber and Zenith. Rebuilt or remanufactured carburetors can also be used in small engines.

Small Engine Carburetors
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Check For 100 New Release & BestSeller Books For Your Collection

Carburetors provides detailed information about carburetors, carburetor parts, carburetor tuning, and more. Carburetors is affiliated with Car Transport.

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