When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Figure 1. Picture comparison test setup. Click here to see an enlarged diagram. The new digital ...

A remote starter switch and a top-quality, screw-in-type compression gaugeâ such as these models from Sears, Roebuck & Companyâ can be used to measure the pumping efficiency of an engine, as well as ...