Valve/Valve Spring Specifications
VALVES & VALVE SPRINGS SPECIFICATIONS
| Application |
In. (mm) |
| Face Angle |
44° |
| Head Diameter |
1.77-1.79 (44.96-45.47) |
| Minimum Margin |
.031 (.79) |
| Stem Diameter |
| Intake |
.3416-.3423 (8.677-8.694) |
| Exhaust |
.3411-.3418 (8.664-8.681) |
| Valve Springs |
| Free Length |
| Intake |
| 5.0L |
2.04 (51.8) |
| 5.0L HO |
2.02 (51.3) |
| 5.8L |
2.05 (52.1) |
| Exhaust |
| 5.0L |
1.88 (47.8) |
| 5.0L HO |
1.79 (45.47) |
| 5.8L |
1.87 (47.50) |
| Installed Height |
| Intake |
1.78 (45.2) |
| Exhaust |
1.60 (40.6) |
| Out-of-Square |
.078 (1.98) |
| Pressure |
| Intake Valve Closed |
| 5.0L HO |
74-82 @ 1.50 (34-37 @ 45.2) |
| 5.8L |
N/A |
| Intake Valve Open |
| 5.0L & HO |
211-230 @ 1.33 (96-104 @ 33.8) |
| 5.8L |
N/A |
| Exhaust Valve Closed |
| 5.0L & HO |
77-85 @ 1.60 (35-39 @ 40.6) |
| 5.8L |
71-79 @ 1.60 (32-36 @ 40.6) |
| Exhaust Valve Open |
| 5.0L & HO |
200-226 @ 1.15 (91-103 @ 29.2) |
| 5.8L |
195-215 @ 1.05 (89-98 @ 26.7) |