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E-TEC 170 Aluminum Cylinder Heads
- Small Block Chevy 302-400ci
- Equipped With Springs For Hydraulic Flat Tappet Camshaft
- Port Volumes: 170cc/70cc
- Valve Size: 1.94"/1.55"
- Combustion Chamber Size: 64cc
- Assembled, Sold Individually
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,
Gasket SeatValve Lift Intake Exhaust .100' 64 54 .200' 130 104 .300' 186 140 .400' 220 169 .500' 232 183 .600' 238 190 .700' N/A N/A Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28' H2O
Part TypeCylinder Head
BrandEDELBROCK
Package Height9.2
Package Width11.2
Package Length25.7
Weight31.64 PG
Retainers IncludedYes
Guideplates IncludedYes
Oiling StyleThrough pushrod
Valve Seats MachinedYes
Heat CrossoverNo
Number Of Springs Per ValveSingle
Spark Plug StyleStraight
Damper Spring IncludedYes
Cylinder Head TypeStandard
Valve Stem Seals IncludedYes
Intake Valve Diameter1.94 in (49.276 mm)
Valve Guide MaterialManganese bronze
Outside Diameter Of Outer Spring1.46 in (37.1 mm)
Steam Holes DrilledNo
Rocker Arm Studs IncludedYes
Retainer MaterialSteel
Cnc-Machined Combustion ChamberNo
Exhaust Valve Diameter1.55 in (39.37 mm)
Part CategoryPerformance Parts
Cylinder Head MaterialAluminum
Intake Port LocationStandard
Emission50 State Legal
Exhaust Valves IncludedYes
Locks IncludedYes
Engine Make/SizeChevy Small Block (262-400)
Lock Style7 degree
Rocker Arms IncludedNo
Rocker Arm Nuts IncludedNo
Cylinder Head FinishNatural
Maximum Valve Lift0.575 in (14.605 mm)
Valve Seat MaterialPowdered metal
FinishCast Aluminum
Valve Springs IncludedYes
UsageStreet/Performance
Valve Seat Machine Style3-angle
Valve Guides IncludedYes
Cnc-Machined Intake RunnerNo
Intake Valves IncludedYes
QuantitySold individually
Accessory Bolt Holes DrilledYes
Exhaust Runner Volume (Cc)70
Exhaust Port LocationStandard
TypeComplete
Combustion Chamber Volume (Cc)64
Machined For O-RingNo
PreparationBolt On (Not Required)
Cylinder Head StyleAssembled
Part FitmentSemi Universal
Valve Cover Mounting StyleCenter and perimeter bolt
Valve Stem Seal StylePositive stop
Intake Runner Volume (Cc)170
Cnc-Machined Exhaust RunnerNo
Vendor Part Number60979
Package Qty1
Package TypeEA
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