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Performer Corvette (1986-1991)
Designed for 1986-91 Tuned Port Injected (T.P.I) 5.7L small-block Chevy Corvette engines originally equipped with centerbolt valve covers. Performer centerbolt cylinder heads are 50-state street legal and accept factory centerbolt valve covers. The intake bolt pattern utilizes the 1986-91 (straight) 90° angle on all bolts. Spark plugs are angled like stock O.E. heads.
Cylinder Head Specifications |
| Combustion chamber volume |
60cc |
| Intake runner volume |
165cc |
| Exhaust runner volume |
65cc |
| Intake valve diameter |
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 |
0.575" |
| Rocker stud |
3/8" |
| Guideplate |
Hardened steel |
| Pushrod diameter |
5/16" |
| Valve angle |
23° |
| Exhaust port location |
Stock |
| Spark plug fitment |
14mm x 3/4 reach, gasket seat |
| Made In |
USA |
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Technical Notes: Match with Edelbrock head gasket sets on pages 126-128. Bare heads will have valve guides and seats installed, but will require final sizing and a valve job to match the valves you will be using. Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat. |
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| Description |
Bare (Single) |
Complete (Single) |
| Performer Centerbolt for 1986-91 Small-Block Corvette |
60869 |
60879 |
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Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28" H2O
| #60879 |
| Valve Lift |
.100" |
.200" |
.300" |
.400" |
.500" |
.600" |
.700" |
| Intake |
64 |
122 |
177 |
217 |
229 |
232 |
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| Exhaust |
54 |
96 |
124 |
147 |
166 |
175 |
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AMC
Small Block
