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If you're new to the use of a vacuum pumps for racing applications, this guide and technical notes will give you a good overview of what you need to know in order setup your vacuum pump system. We discuss just about everything you can think of on this page, and have another page dedicated to Vacuum Pump Troubleshooting that has even more information. Please remember you can also call us at or email bill gzmotorsports. Vacuum pumps can be rated by their ability to flow air, the more air a vacuum pump flows the more vacuum it will make on a given engine. A "small" vacuum pump would indicate a less airflow capacity than a "big" vacuum pump.