Performer 5.0/5.8L with 1.90" intake valves-Complete Assembly
Performer 5.0/5.8L Heads
Cylinder Head Specifications
| Combustion chamber volume | 60cc |
| Intake runner volume | 170cc |
| Exhaust runner volume | 60cc |
| Intake valve diameter | 1.90" & 2.02" |
| Exhaust valve diameter | 1.60" |
| Valve stem diameter | 11/32" |
| Valve guides | Manganese bronze |
| Deck thickness | 5/8" |
| Valve spring diameter | 1.46" |
| Valve spring maximum lift | .575" |
| Rocker stud | – |
| Guideplate | N/A |
| Pushrod diameter | 5/16" |
| Valve angle | 20° |
| Exhaust port location | Stock |
| Spark plug fitment | 14mm x 3/4 reach, gasket seat |
| Made In | USA |
Technical Notes: 1986 5.0L need pistons notched for clearance.Will not accept rail rockers. 5.0L requires Head Bolt Bushings #9680 and either Head Bolt Kit #8552 (7/16") or stock head bolts. Match with Edelbrock head gasket sets. Bare heads will have valve guides & seats installed, but will require final sizing & a valve job to match the valves you will be using. Recommended spark plugs 14mm x 3/4" reach with flat gasket seat (Champion RC12YC).
Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench
| #60289 | #60379 | |||||||
| Valve Lift | .100" | .200" | .300" | .400" | .500" | .600" | .700" |
| Intake | 72 | 131 | 185 | 214 | 223 | 226 | - |
| Exhaust | 57 | 105 | 131 | 156 | 168 | 175 | - |