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  2. Velocity stack - Wikipedia

    en.wikipedia.org/wiki/Velocity_stack

    Short velocity stacks on a 302 cu.in. Ford FE engine in the tight confines of a Ford GT-40. A velocity stack, trumpet, or air horn [1] is a typically flared, parallel-sided tubular device fitted individually or in groupings to the entry of an engine's air intake system to smooth high speed airflow, and allow engine intake track tuning to incorporate pressure pulses created by its internal ...

  3. Idle air control actuator - Wikipedia

    en.wikipedia.org/wiki/Idle_air_control_actuator

    The IAC actuator is an electrically controlled device, which gets its input from the vehicle's engine control unit (ECU). The actuator is fitted such that it either bypasses the throttle or operates the throttle butterfly valve directly.

  4. Boost controller - Wikipedia

    en.wikipedia.org/wiki/Boost_controller

    A 3-port solenoid-type boost controller A 4-port solenoid-type boost controller (used for a dual-port wastegate). The purpose of a boost controller is to reduce the boost pressure seen by the wastegate's reference port, in order to trick the wastegate into allowing higher boost pressures than it was designed for.

  5. Holley Performance Products - Wikipedia

    en.wikipedia.org/wiki/Holley_Performance_Products

    The brothers then concentrated on the manufacturing of carburetors and ignition systems. [5] As a result of the Motorette Henry Ford commissioned the brothers to produce a carburetor for his Model T. "The carburetor they built for Ford was an immediate success and the brothers founded Holley Carburetor Co., which became one of Ford's biggest ...

  6. Car tuning - Wikipedia

    en.wikipedia.org/wiki/Car_tuning

    Car tuning is the modification of a car to optimise it for a different set of performance requirements from those it was originally designed to meet. Most commonly this is higher engine performance and dynamic handling characteristics but cars may also be altered to provide better fuel economy , or smoother response.

  7. Proportional–integral–derivative controller - Wikipedia

    en.wikipedia.org/wiki/Proportional–integral...

    The other controller acts as inner loop controller, which reads the output of outer loop controller as setpoint, usually controlling a more rapid changing parameter, flowrate or acceleration. It can be mathematically proven [ citation needed ] that the working frequency of the controller is increased and the time constant of the object is ...

  8. Automatic Performance Control - Wikipedia

    en.wikipedia.org/wiki/Automatic_Performance_Control

    The white area on the left side of the scale shows manifold vacuum under normal driving conditions, the short white dash is atmospheric pressure (engine off), the orange scale is where there is safe turbo boost, the red scale is boost above 0.5 - 0.7 bar where the wastegate may be opened or a fuel cut due to overboost may occur.

  9. Staggered tuning - Wikipedia

    en.wikipedia.org/wiki/Staggered_tuning

    Staggered tuning is a technique used in the design of multi-stage tuned amplifiers whereby each stage is tuned to a slightly different frequency. In comparison to synchronous tuning (where each stage is tuned identically) it produces a wider bandwidth at the expense of reduced gain .