Edelbrock 60975 - Edelbrock Performer RPM E-TEC Aluminum Cylinder Heads for Small Block Chevy
JEGS Part Number: 350-60975Performer RPM E-TEC 170 Cylinder Head
Edelbrock 60975 Details
Performer RPM E-TEC 170 Aluminum Cylinder Heads
Edelbrock E-Tec heads are replacements for 302, 327, 350 & 400 c.i.d. S/B Chevy engines with ''Vortec-style'' manifolds. They feature an LT1-style raised runner intake port design for increased air-flow and ultimate performance. A unique combustion chamber design positions the spark plug closer to the center of the cylinder, promoting a more efficient combustion resulting in more power. These heads include an adjustable rocker stud and guide plate set-up for use with adjustable rockers or washers to properly position the stud height to accommodate factory style self-aligning rocker arms. They have 20% more exhaust flow than cast iron Vortec heads, great performance up to 6000 rpm and can produce 9.5:1 compression with stock pistons in 350 cubic-inch engines. RPM E-Tec heads are dual-drilled and will accept 1987-95 centerbolt and/or 1986 & prior perimeter flange mount valve covers and most stock exhaust manifolds. E-Tec 170 heads are 50-state street legal.
Installation Note: To use stock rockers on S/B Chevy heads, .100'' longer than stock pushrods are required. S/B Chevy heads may not be used on engines with less than 4" bore (262, 265, 283, 305, 307 c.i.d.) except with cams having less than .450'' valve lift.
Tech Tip: To gain more spark plug clearance, Edelbrock recommends using Champion RC Series plugs such as the RC12YC. They are 0.230'' shorter than a conventional spark plug and have a 5/8'' hex for easier access.
Combustion Chamber Volume: 64cc Intake Runner Volume: 170cc Exhaust Runner Volume: 70cc Intake Valve Diameter: 1.94'' Exhaust Valve Diameter: 1.55'' 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,
Edelbrock Performer RPM E-TEC Aluminum Cylinder Heads for Small Block Chevy
Engineered to greatly increase performance and efficiency, E-TEC heads fit SB-Chevy 302-400ci engines with ''Vortec'' style intake manifolds. These powerful heads incorporate Edelbrock's high-quench combustion chamber which promotes a more uniform atomization of the air/fuel mixture for more power. Spark plugs have been positioned closer to the center of the cylinder for more efficient combustion. Swirl-polished stainless steel valves provide maximum flow. They accept center bolt or standard valve covers, work with most stock exhaust manifolds and have intake and exhaust ports that are .200'' taller than typical SB-Chevy heads. Match these heads with an Edelbrock Vortec intake manifold for the best results.
RPM E-Tec heads are dual-drilled and will accept 1987-95 centerbolt and/or 1986 & prior perimeter flange mount valve covers and most stock exhaust manifolds.Performer RPM E-TEC 170
|Performer RPM E-Tec:||170||200|
|Combustion Chamber Volume||64cc|
|*Intake Runner Volume||170cc||200cc|
|*Exhaust Runner Volume||70cc||80cc|
|*Intake Valve Diameter||1.94"||2.02"|
|*Exhaust Valve Diameter||1.55"||1.60"|
|Valve Stem Diameter||11/32"|
|Valve Guides||Manganese Bronze|
|Valve Spring Diameter||1.46"|
|Valve Spring Maximum Lift||0.575"|
|Exhaust Port Location||Stock|
|Spark Plug Fitment||14mm x 3/4" reach, gasket seat|
|*Differences Between The 170 & 200 Heads|