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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.
The anti-lag system (ALS) is a method of reducing turbo lag or effective compression used on turbocharged engines to minimize turbo lag on racing or performance cars. It works by retarding the ignition timing and adding extra fuel (and sometimes air) to balance an inherent loss in combustion efficiency with increased pressure at the charging side of the turbo.
This allows a boost control strategy that reduces exhaust backpressure caused by the turbocharger by opening the wastegate when turbo boost is not needed, resulting in improved fuel economy. The wastegate is also held open during cold starting to lower emissions by speeding up initial catalyst light-off.
Electronic controllers add greater flexibility in management of boost pressures, compared with the manual controllers. [2] The actuation of an electronic boost controller can be managed by one of two control systems: Open-loop is the simpler option, where control output is merely based on other inputs such as throttle angle and/or engine speed ...
Here the seat controls are located on the door panels, next to the memory seat controls. Above the seat settings are the memory control settings which also set the mirrors and pedals. A power seat in an automobile is a seat in a passenger compartment that can be adjusted using a button, switch or joystick and a set of small electric motors ...
Boost gauge on a Ford Focus RS (left) 30 psi Boost gauge Top: Turbo/APC boost gauge in a Saab 900. A boost gauge [1] is a pressure gauge that indicates manifold air pressure or turbocharger or supercharger boost pressure [2] in an internal combustion engine. They are commonly mounted on the dashboard, on the driver's side pillar, or in a radio ...
A similar phenomenon that is often mistaken for turbo lag is the boost threshold. This is where the engine speed (rpm) is currently below the operating range of the turbocharger system, therefore the engine is unable to produce significant boost. At low rpm, the exhaust gas flow rate is unable to spin the turbine sufficiently.
It was originally intended to keep the engine running a preset amount of time as to let the engine cool, and prevent carbon buildup. Eventually HKS developed the turbo timer more, including features such as adjustable timing, multiple different time presets, the ability to monitor voltage, as well as a combined security system as well. [2]