Vehicle owners just have lots of questions why they need a vacuum advance in their vehicles’ distributors. Vacuum advance is definitely a vehicle device, which advances the ignition timing of the engine in response to increased in the engine vacuum. Those questions by vehicle owners may have come from the observations, which many high performance distributors does not incorporate vacuum advance that results an implication that it is not essential for a good engine ignition. Some of the handful of applications where a vacuum advance is not of significant benefits includes, sever duty very large trucks, constant speed and load applications and pure racing engine.

And, for normal automotive application, Accel vacuum advance will best benefit your engine. Accel vacuum advance will provide your vehicle lots of advantage when it comes to performance and efficiency. It definitely improves your vehicle’s idle cooling and idle quality. The vacuum advance also improved your fuel economy, drivability, and throttle response.

It also as well enables an improved spark knock control under full throttle acceleration and enables leaner fuel jetting in a light load to further improve the fuel economy. The main reason for all such improvements is because of the Accel vacuum advance mechanism. Such mechanism allows the vehicle distributor to be able to supply a more optimum spark timing that is proportional to the speed and load output. If you don’t have an Accel vacuum advance in your vehicle, your distributor can only vary spark timing in proportion to speed. Your vehicle’s need for approximately additional 20 degrees of spark timing at light loads will not be provided also if you don’t have a vacuum advance. So do yourself a little favor, make sure your distributor have a vacuum advance so to have an engine with an optimum performance.