| Application | In. (mm) | ||||
|---|---|---|---|---|---|
| Head Diameter | |||||
| Intake | 1.29 (33.0) | ||||
| Exhaust | 1.49 (38.0) | ||||
| Stem Diameter | |||||
| Intake | .2744-.2750 (6.970-6.985) | ||||
| Exhaust | .3159-.3165 (8.025-8.040) | ||||
| Face Angle | 45° | ||||
| Minimum Margin | |||||
| Intake | .030-.049 (.75-1.25) | ||||
| Exhaust | .047-.071 (1.20-1.80) | ||||
| Maximum Refinish | N/a | ||||
| Valve Springs | |||||
| Free Length | |||||
| Intake | |||||
| Inner Spring | 1.835 (46.6) | ||||
| Outer Spring | 2.00 (50.8) | ||||
| Exhaust | |||||
| Inner Spring | 2.091 (53.1) | ||||
| Outer Spring | 2.295 (58.3) | ||||
| Out-of-Square | |||||
| Intake | |||||
| Inner Spring | .064 (1.63) | ||||
| Outer Spring | .070 (1.77) | ||||
| Exhaust | |||||
| Inner Spring | .074 (1.89) | ||||
| Outer Spring | .083 (2.11) | ||||
| Installed Height | N/a | ||||
| Pressure: Lbs. @ in (Kg @ mm) | |||||
| Intake | |||||
| Inner Spring | |||||
| Valve Closed | 19-22 @ 1.555 (9-10 @ 39.5) | ||||
| Valve Open | N/a | ||||
| Outer Spring | |||||
| Valve Closed | 29-33 @ 1.732 (13-15 @ 44) | ||||
| Valve Open | N/a | ||||
| Exhaust | |||||
| Inner Spring | |||||
| Valve Closed | 33-37 @ 1.594 (15-17 @ 40.5) | ||||
| Valve Open | N/a | ||||
| Outer Spring | |||||
| Valve Closed | 52-59 @ 1.772 (24-27 @ 45) | ||||
| Valve Open | N/a | ||||
VALVE SPECIFICATIONS