If there's no vacuum cannister, it has mechanical secondaries. Nearly all four-barrel, Holley-style, carbs with mechanical secondaries have an accelerator pump on the secondary side in addition to ...

This video will show how to make a vacuum pump, a device that can be used to suck the air out of sealed environments. This is the same pump I use to operate my vacuum cannon seen here ...

One item that requires occasional tender loving care is the vacuum pump. Because a diesel has an open intake system, the pump provides the necessary power for a Dodge Ram pickup’s vacuum ...