Zenith Test Stand

Zenith carburetor sets were tested on a test engine. This is the only way to be sure that the fuel pumps in the carbs are working together, and adequately. As noted elsewhere, the cavity where the pump sits can become larger over time and the pump will not sit correctly for proper performance. The work continued as long as necessary, replacing the pump multiple times, until a pair worked synchronistically. Sometimes it was okay first try, sometimes not. A light sanding of the leather skirt was found to help the pump fit better.

Carbs have been known to be on the test engine for a couple of weeks. When these carbs got to your car though, they could still need some fine tuning as the test engine is not your engine.

This ability was courtesy of a Test Engine stand developed by Zalex Industries, which allowed for a running engine outside of a car. The carbs could be checked and balanced in actual use, rather than just on a flow bench.

The Solex was bench set, which proved to be acceptable over 99% of the time.