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NASCAR Sprint Cup engines still utilize a Holley throttle body and Holley EFI is the spec EFI system in NHRA Pro Stock. Holley's product range has expanded to include the aforementioned fuel injection systems, performance fuel pumps, intake manifolds, superchargers, nitrous oxide injection, performance plumbing parts, exhaust systems, engine ...
Typically, the system is operated by the pilot manually switching the intake air to travel via the heated intake path as required. The carburetor heat system reduces the power output (due to the lower density of heated air) and causes the intake air filter to be bypassed, therefore the system is only used when there is a risk of icing. [35]
The 2150 improved on the 2100s design through the introduction of a variable air bleed system, which keeps the air to fuel mixture better balanced throughout the carburetor's full range of operation. The 2150 models from 1983 to 1986 were electronic feedback carburetors equipped with Ford's EEC-IV. [2]
Rochester Products Division (RPD) was a division of General Motors that manufactured carburetors, and related components including emissions control devices and cruise control systems in Rochester, New York.
The LT-1 had an 11.0:1 compression ratio, Holley 780 cu ft/min (22 m 3 /min) 4-barrel carburetor, and solid lifters. For the first year the LT-1 was rated at 370 hp (276 kW) in the Corvette and 360 hp (268 kW) in the Camaro, both of these being brake horsepower (bhp) gross hp ratings. Despite the disparity in these horsepower ratings, there was ...
The 454 EFI version was rated from 230 hp (172 kW) to 255 hp (190 kW) and from 385 lb⋅ft (522 N⋅m) to 405 lb⋅ft (549 N⋅m) of torque. The 1991–1993 454SS made 255 horsepower at 4000 rpm and 405 lb-ft of torque at 2400 rpm thanks to dual 2.5" catalytic converters.
It also features a fuel-injection system, engine management from a Holley HP EFI electronic control unit with self-tuning fuel table strategies and data logging, Holley Hi-Ram intake manifold, rear axle gearing optimized for each vehicle depending on the engine and transmission, a 'heritage' grille and standard-production (non-HID) headlamps ...
The system was a speed/density system, using engine speed and intake manifold air density to calculate the amount of fuel to be injected. In 1974, Bosch introduced the K-Jetronic system, which used a continuous flow of fuel from the injectors (rather than the pulsed flow of the D-Jetronic system). K-Jetronic was a mechanical injection system ...