A shaker scoop (sometimes called a shaker hood scoop or a shaker hood) is an

automobile A car or automobile is a motor vehicle with Wheel, wheels. Most definitions of ''cars'' say that they run primarily on roads, Car seat, seat one to eight people, have four wheels, and mainly transport private transport#Personal transport, pe ...

term for an

air intake An intake (also inlet) is an opening, structure or system through which a fluid is admitted to a space or machine as a consequence of a pressure differential between the outside and the inside. The pressure difference may be generated on the ins ...

for combustion air that is mounted directly on top of the engine's

air cleaner A particulate air filter is a device composed of fibrous, or porous materials which removes solid particulates such as dust, pollen, mold, and bacteria from the air. Filters containing an adsorbent or catalyst such as charcoal (carbon) may also ...

and protrudes through a hole in the

hood Hood may refer to: Covering Apparel * Hood (headgear), type of head covering ** Article of Academic dress#Hood, academic dress ** Bondage hood, sex toy * Hoodie, hooded sweatshirt Anatomy * Clitoral hood, a hood of skin surrounding the clitori ...

. Since it is fastened directly to the engine, it moves with the engine's movement and vibration on its mountings, thus the 'shaker' name.

Design

Like all such scoops, its purpose is to increase performance by a 'ram air' effect, taking advantage of the vehicle's speed to deliver high pressure, cool air to the engine over a shorter, less restrictive flow path. However, because engines draw air in hundreds of cubic feet per minute, scoops do not raise intake pressures significantly. Additional claimed benefits of a shaker hood include elevation to prevent water from being drawn on flooded terrain, being a source of cooler, denser air, and having a more direct path to the engine's throttle plate.

Aftermarket

Hot rod Hot rods are typically American cars that might be old, classic, or modern and that have been rebuilt or modified with large engines optimised for speed and acceleration. One definition is: "a car that's been stripped down, souped up and made ...

and

drag race Drag racing is a type of motor racing in which automobiles or motorcycles compete, usually two at a time, to be first to cross a set finish line. The race follows a short, straight course from a standing start over a measured distance, most c ...

enthusiasts have modified automotive engines to increase power via

supercharger In an internal combustion engine, a supercharger compresses the intake gas, forcing more air into the engine in order to produce more power for a given displacement. The current categorisation is that a supercharger is a form of forced induct ...

forced induction In an internal combustion engine, forced induction is where turbocharging or supercharging is used to increase the density of the intake air. Engines without forced induction are classified as naturally aspirated. Operating principle Overvi ...

since the 1920s; in some cases, a blower scoop is added to the top of the supercharger as an aid to air intake. A vehicle also can be equipped with an aftermarket engine-mounted scoop that is mounted directly to the

carburetor A carburetor (also spelled carburettor) is a device used by an internal combustion engine to control and mix air and fuel entering the engine. The primary method of adding fuel to the intake air is through the venturi tube in the main meteri ...

and protrudes through the hood, which is known as a carb scoop. Carb scoops are sometimes mistaken for blower scoops, but the presence (or lack) of a belt to drive the supercharger is one way to distinguish these scoops. Both carb and blower scoops are sometimes called bugcatchers. Like the shaker scoop, both a blower scoop and a carb scoop will vibrate in response to engine motions because they are attached to the engine. Some aftermarket scoops include

butterfly valve A butterfly valve is a valve that isolates or regulates the flow of a fluid. The closing mechanism is a disk that rotates. Principle of operation Operation is similar to that of a ball valve, which allows for quick shut off. Butterfly valves ...

s, which act as secondary throttle bodies.

Factory-fitted

1971 Plymouth Cuda 440-6 Hardtop (24452748914)

Larry Shinoda Lawrence Kiyoshi (Larry) Shinoda (March 25, 1930 – November 13, 1997) was a noted American automotive designer who was best known for his work on the Chevrolet Corvette and Ford Mustang. Early life and internment He was born in Los Angeles, ...

Ford Ford commonly refers to: * Ford Motor Company, an automobile manufacturer founded by Henry Ford * Ford (crossing), a shallow crossing on a river Ford may also refer to: Ford Motor Company * Henry Ford, founder of the Ford Motor Company * Ford F ...

is credited with introducing the shaker hood scoop as a factory-fitted option and campaigning to make it functional, first available exclusively for the 1969 model year

Mustang The mustang is a free-roaming horse of the Western United States, descended from horses brought to the Americas by the Spanish. Mustangs are often referred to as wild horses, but because they are descended from once-domesticated animals, they ...

equipped with the 428 Cobra Jet engine; the option was expanded to other Ford Mustang engines for 1970 and imitated quickly by competitors Chrysler (1970 Plymouth 'cuda and

Dodge Challenger The Dodge Challenger is the name of three different generations of automobiles (two of those being pony cars) produced by American automobile manufacturer Dodge. However, the first use of the Challenger name by Dodge was in 1959 for marketing a ...

) and

Pontiac Pontiac may refer to: *Pontiac (automobile), a car brand *Pontiac (Ottawa leader) ( – 1769), a Native American war chief Places and jurisdictions Canada *Pontiac, Quebec, a municipality ** Apostolic Vicariate of Pontiac, now the Roman Catholic D ...

(1970 Firebird Trans Am, which used a backwards-facing scoop to draw air from the high-pressure area at the base of the windshield). Some official

Chrysler Stellantis North America (officially FCA US and formerly Chrysler ()) is one of the " Big Three" automobile manufacturers in the United States, headquartered in Auburn Hills, Michigan. It is the American subsidiary of the multinational automoti ...

literature referred to this popular hood style as the "Incredible Quivering Exposed Cold Air Grabber". This lengthy title has since been shortened by enthusiasts and collectors to the less tongue-twisting "shaker hood". In the 2000s, factory-fitted shaker scoops were reintroduced with the Ford Mustang (2003 Mach 1) and Dodge Challenger (2014 "Shaker" package).

Examples

File:1969 Ford Mustang Mach 1 428CJ (22865677869).jpg, 1969

Ford Mustang Mach 1 The Ford Mustang Mach 1 is a performance-oriented option package of the Ford Mustang muscle car, originally introduced in August 1968 for the 1969 model year. It was available until 1978, returned briefly in 2003, 2004, and most recently 20 ...

428 CJ File:1970 Ford Mustang Boss 302 (14376335324).jpg, 1970

Boss 302 Mustang The Mustang Boss 302 is a high-performance variant of the Ford Mustang originally produced by Ford in 1969 and 1970, alongside its more powerful sibling the Boss 429 Mustang. Ford revived the name for another two year production run in 2012 and ...

File:'70 Plymouth Barracuda Hemi (Auto classique).JPG, 1970 Plymouth 'cuda File:1970 Dodge Challenger RT (14922593932).jpg, 1970

File:1970 Ford Torino GT (27755459004).jpg, 1970 Ford Torino GT File:1970 Pontiac Firebird Transam (17736059759).jpg, 1970

Pontiac Firebird Trans Am The Pontiac Firebird is an American automobile that was built and produced by Pontiac from the 1967 to 2002 model years. Designed as a pony car to compete with the Ford Mustang, it was introduced on February 23, 1967, five months after GM's Ch ...

File:1971 Ford XY Falcon GTHO Phase 3 Sedan (9956968536).jpg, 1971

Ford Falcon XY The Ford Falcon (XY) is a full-size car produced by Ford Australia from 1970 to 1972. It was the fourth and last iteration of the second generation of the Ford Falcon (Australia), Falcon and included the Ford Fairmont (XY)—the luxury-oriented ...

GTHO Phase III The Ford Motor Company Falcon XY GT is a sports sedan based on the Ford Falcon XY. Released in 1970 by Ford Australia, with the GTHO Phase III released in 1971. Some 1,557 units were produced from September 1970 to December 1971 with 300 GTHO ...

File:1974 Pontiac Ventura with GTO option - factory original condition 2of6.jpg, 1974

Pontiac Ventura The Pontiac Ventura was an automobile model that was produced by Pontiac. As was common practice at the time, its name was derived from Ventura, California, joining other similarly derived models such as the fellow Pontiac Catalina, the Chevrolet M ...

(GTO) File:1977 Pontiac Can Am with TA 6.6 at 2015 Macungie show 1of3.jpg, 1977

Pontiac Can Am The Pontiac Can Am is a midsize muscle car built by Pontiac and based on the Pontiac LeMans and the Pontiac Grand Am. The Can Am was a special edition option package and was only available in 1977. It was named for the Can Am racing series, c ...

File:2003 Ford Mustang Mach 1 Coupe (14370242858).jpg, 2003

File:Dodge Challenger at the 2014 New York International Auto Show (13982207593).jpg, 2014 Dodge Challenger R/T Such scoops were fitted to a variety of cars, including: *

1969 Ford Mustang The first-generation Ford Mustang was manufactured by Ford from March 1964 until 1973. The introduction of the Mustang created a new class of automobiles known as the pony cars. The Mustang’s styling, with its long hood and short deck, prove ...

Cobra Jet * 1970 Boss 302 Mustang * 1970 Plymouth Barracuda *

Ford Torino The Ford Torino is an automobile that was produced by Ford for the North American market between 1968 and 1976. It was a competitor in the intermediate market segment. The car was named after the city of Turin (''Torino'', in Italian), consider ...

Pontiac GTO The Pontiac GTO is an automobile that was manufactured by American automaker Pontiac from 1963 to 1974 for the 1964 to 1974 model years, and by GM's subsidiary Holden in Australia for the 2004 to 2006 model years. The first generation of the G ...

Pontiac Firebird The Pontiac Firebird is an American automobile that was built and produced by Pontiac from the 1967 to 2002 model years. Designed as a pony car to compete with the Ford Mustang, it was introduced on February 23, 1967, five months after GM's Che ...

Trans Am *

Grand Am * Ford Falcon XY GT Phase III * 2004 Ford Mustang Mach 1

References

{{DEFAULTSORT:Shaker Scoop Automotive accessories Automotive styling features