Standard Motor Product VC31
Distributor vacuum advance unit for classic Ford / Lincoln / Mercury systems. Controls ignition timing according to intake vacuum.
Standard Motor Product VC31 is a distributor vacuum advance unit for classic Ford, Lincoln and Mercury ignition systems. It changes ignition timing according to intake vacuum, improving engine response and drivability under part-throttle conditions.
Application / fitment
This vacuum advance unit is used in selected classic Ford / Lincoln / Mercury distributors. Match it by distributor number, mounting arm style and vacuum advance calibration rather than engine displacement alone.
- classic Ford distributors with vacuum advance
- selected Ford / Lincoln / Mercury applications
- L6 and V8 engines depending on distributor number
- systems using a single vacuum port
Before installation, check the old diaphragm for leakage and make sure the distributor plate moves freely. After replacement, verify base timing and vacuum advance operation.
Technical information
- type: distributor vacuum advance
- vacuum ports: 1
- function: vacuum-controlled ignition timing advance
- application: classic Ford / Lincoln / Mercury distributors