|
 |
Performer RPM Olds
- Designed for high-performance non-emission 1965-76 Olds 400, 425 and 455 c.i.d. V8s
- Heart shaped chamber for a more efficient burn, outstanding hp and torque
- Valvetrain has been upgraded from the factory pedestal-mount system to an ARP 7/16" screw-in stud and 3/8" pushrod-slot guideplate for increased valvetrain stability
- #60517 is not port matched or bowl blended and is NHRA-accepted for Stock and Super Stock (except 1968-1969 W-30)
Cylinder Head Specifications |
| Combustion chamber volume |
77cc |
| Intake runner volume |
188cc |
| Exhaust runner volume |
106cc |
| Intake valve diameter |
2.072" |
| Exhaust valve diameter |
1.68" |
| 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 |
7/16" |
| Guideplate |
Hardended steel |
| Pushrod diameter |
3/8" |
| Valve angle |
18° |
| Exhaust port location |
Stock |
| Spark plug fitment |
14mm x 3/4 reach, gasket seat |
| Made In |
USA |
|
|
Technical Notes: Head bolt holes drilled for stock 7/16" bolts, but can be easily modified for 1/2" bolts or studs by drilling the 1/2" counterbore. Aftermarket 7/16"-stud rocker arms and 3/8" hardened pushrods required. Will fit 350-403 Olds with Edelbrock manifold #7111 only (port matching required). Match with Edelbrock head gasket sets. Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat. |
| |
| Description |
Bare |
Complete |
| Performer RPM Olds (with springs for hydraulic flat tappet cams) |
60529* |
60519* |
| Performer RPM Olds (with springs for hydraulic roller cams) |
60529* |
60515* |
| Performer RPM Olds (Stock & Super Stock) |
60517* |
N/A |
|
Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench
| #60519 |
| Valve Lift |
.100" |
.200" |
.300" |
.400" |
.500" |
.600" |
.700" |
| Intake |
67-67 |
131-131 |
195-195 |
245-247 |
278-256 |
268-259 |
- |
| Exhaust |
54 |
102 |
137 |
163 |
179 |
188 |
- |
|
AMC
