Vulcan VC517 Vacuum Control Valve
type: Unknown Type
Vendor: CorvairFarmer
Description:
Vulcan VC517 Vacuum Control Valve
| Attribute | Detail |
|---|---|
| Part Number | VC517 |
| Brand | Vulcan / Sorensen (legacy ignition & emissions components) |
| Type | Vacuum Delay Valve / Vacuum Control Valve |
| Function | Regulates vacuum signal timing to emission or ignition components |
| Housing Material | Molded plastic or metal composite |
| Ports | Dual vacuum nipples (typically 3/16" or 1/4") |
| Delay Time | ~5–10 seconds (varies by internal diaphragm and spring tension) |
| Mounting Style | Inline hose mount or bracket clip |
| Color Coding | Often color-coded for delay calibration (e.g., black, blue, green) |
🚗 Fitment & Applications
The VC517 is used in vacuum-controlled emission systems, especially in 1970s–1980s American vehicles with carbureted engines. It delays vacuum signal to components like:
-
EGR valves
-
Distributor vacuum advance
-
Thermal vacuum switches
-
Air injection diverter valves
✅ Common Vehicle Fitments
| Make | Models | Years | Engines |
|---|---|---|---|
| Chevrolet | C10, Caprice, Camaro, Monte Carlo | 1975–1985 | 305, 350 V8 |
| Ford | F-100, LTD, Mustang | 1974–1986 | 302, 351 Windsor |
| Dodge | D150, Diplomat, Ramcharger | 1976–1987 | 318, 360 V8 |
| Pontiac | Bonneville, LeMans, Firebird | 1975–1981 | 301–400 CID V8 |
| AMC/Jeep | CJ7, Wagoneer, J10 | 1977–1984 | 258 I6, 304/360 V8 |
🔍 Often found near the carburetor base, firewall, or vacuum tree junctions.
🔁 Cross Reference Numbers
| Brand | Part Number |
|---|---|
| Sorensen | VC517 |
| Standard Motor Prod. | VC31 |
| AC Delco | 214-507 |
| BWD Automotive | EC31 |
| Wells | E517 |
| Niehoff | V517 |
| Echlin (NAPA) | VC517SB |
| OEM GM | 17052042 (approx match) |