1986-91 Small Block Chevy Corvette Engine
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.
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,
Valve Lift Intake Exhaust .100'' 64 54 .200'' 122 96 .300'' 177 124 .400'' 217 147 .500'' 229 166 .600'' 232 175 .700'' N/A N/A Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28'' H2O
Technical Notes: 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.
Edelbrock Performer Aluminum Cylinder Heads are designed, cast and manufactured in the USA for unsurpassed quality. The top quality features incorporated into these heads include: highly effecient port design, state-of-the-art combustion chamber shapes, manganese-bronze valve guides, and threaded inserts in the exhaust bolt holes and rocker stud holes for strength and durability. They provide great torque and horsepower up to 5500 rpm and are 50 state emissions legal to fit emissions controlled engines, E.O. Number D-215-49!
Will the Edelbrock 350-60869 heads work on a 305 block
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