Ashaker scoop (sometimes called ashaker hood scoop or ashaker hood) is anautomobile term for anair intake for combustion air that is mounted directly on top of theengine'sair cleaner and protrudes through a hole in thehood. Since it is fastened directly to the engine, it moves with the engine's movement and vibration on its mountings, thus the 'shaker' name.
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.[1] However, because engines draw air in hundreds of cubic feet per minute, scoops do not raise intake pressures significantly.[2] 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.[1]
Hot rod anddrag race enthusiasts have modified automotive engines to increase power viasuperchargerforced induction since the 1920s; in some cases, ablower 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 thecarburetor and protrudes through the hood, which is known as acarb 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 calledbugcatchers. 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 includebutterfly valves, which act as secondarythrottle bodies.[3]
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Larry Shinoda ofFord is credited with introducing the shaker hood scoop as a factory-fitted option and campaigning to make it functional, first available exclusively for the 1969model yearMustang equipped with the428 Cobra Jet engine;[4] the option was expanded to other Ford Mustang engines for 1970 and imitated quickly by competitors Chrysler (1970Plymouth 'cuda andDodge Challenger) andPontiac (19701⁄2Firebird Trans Am, which used a backwards-facing scoop to draw air from the high-pressure area at the base of the windshield).[5] Some officialChrysler literature referred to this popular hood style as the "Incredible Quivering Exposed Cold Air Grabber".[6] 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 the2003 Ford Mustang Mach 1[7][8] and2014 Dodge Challenger ("Shaker" and "Mopar" models).[2][9] The 2003–04 Mustang Mach 1 was equipped with a model-specific32-valve 4.6 L V-8 engine,[10] to fill the performance gap between the less-powerful Mustang GT and the flagshipMustang SVT Cobra.[11] For the 2014 model year, Dodge announced the shaker scoop Challengers as limited-production models at theSEMA show in November 2013;[12] shaker scoop availability was extended in 2015.[13] The shaker package was available through the 2023 model year,[14] when the Challenger was discontinued.[15]
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Such scoops were fitted to a variety of cars, including:
What's the point of the Shaker hood? I dunno -- what has the point of a Shaker hoodever been? The performance advantages are debatable, so I guess you buy one because you think it looks cool.
