Made in USA
E-CNC Cylinder Head Small Block Chevy
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EDELBROCKPART NUMBER: 350-79899

E-CNC Cylinder Head Small Block Chevy

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This product is no longer available. Please call customer service for assistance at 1-800-345-4545.

E-CNC 185
  • 1986 & Earlier Small Block Chevy 302-400ci
  • Valve Springs for Hydraulic Flat Tappet
  • Port Volumes: 185cc/75cc
  • Combustion Chamber size: 64cc
  • Valve Sizes: 2.02"/1.60"
  • Straight Spark Plug
  • Assembled, Sold Each

    Installation Notes: When using stock rockers on SB-Chevy Performer & Performer RPM heads, .100' longer than stock pushrods are required. Due to valve-to-cylinder bore interference, SB-Chevy heads may not be used on engines with less than 4' bore (262, 265, 283, 305, 307 c.i.d.) except with camshafts having less than .450' valve lift.

    Combustion Chamber Volume:64cc
    Intake Runner Volume:185cc
    Exhaust Runner Volume:75cc
    Intake Valve Diameter:2.02'
    Exhaust Valve Diameter:1.60'
    Valve Stem Diameter:N/A
    Valve Guides: 
    Deck Thickness:9/16'
    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


    Valve LiftIntakeExhaust
    .100'6153
    .200'129106
    .300'186147
    .400'231185
    .500'250199
    .600'254203
    .700'253209
    Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28' H2O

Since founder Vic Edelbrock Sr. began building performance intake manifolds in 1938, Edelbrock has grown into one of the most trusted names in American high-performance parts, from carburetors and intake manifolds to cylinder heads, crate engines, and EFI systems. JEGS has spent decades supplying Edelbrock components to racers, engine builders, and street enthusiasts, backing this extensive lineup with in-house technical support, fast shipping, and a Price Match Guarantee so you can choose proven Edelbrock parts with confidence.

Fully CNC'd Ports and Combustion Chambers!

For the ultimate in performance, Edelbrock's E-CNC cylinder heads are the answer. These cylinder heads are fully CNC ported for maximum horsepower and torque, making them ideal for high-performance street and light duty racing applications. They also feature high-quality lightweight valve springs and heavy duty hardware for maximum lift and maintain the stock exhaust port location. Made In The USA!

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Features:

  • Features fully CNC machined intake ports, combustion chambers and exhaust ports for improved performance
  • Maintains the stock 23° valve angle and intake flange bolt pattern for use with 1986 and earlier intake manifolds
  • Delivers up to 30-60 horsepower over Performer RPM Cylinder Heads
  • E-CNC 225 Heads (p/n 350-61205 & 350-61209) features 7/16" studs and angled spark plugs
  • Ideal for high performance street and light duty racing applications
Part TypeCylinder Head
Product LineEdelbrock Small Block Chevy E-CNC Aluminum Cylinder Heads
BrandEDELBROCK
Package Height8.6
Package Width11.1
Package Length25.9
Weight30.19 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 Diameter2.02 in (51.308 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 ChamberYes
Exhaust Valve Diameter1.6 in (40.64 mm)
Part CategoryPerformance Parts
Cylinder Head MaterialAluminum
Intake Port LocationStandard
EmissionNon-Emissions
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 MaterialDuctile iron
FinishCast Steel
Valve Springs IncludedYes
UsageCompetition
Valve Seat Machine Style3-angle
Valve Guides IncludedYes
Cnc-Machined Intake RunnerYes
Intake Valves IncludedYes
QuantitySold individually
Accessory Bolt Holes DrilledYes
Exhaust Runner Volume (Cc)75
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 StylePerimeter bolt
Valve Stem Seal StylePositive stop
Intake Runner Volume (Cc)185
Cnc-Machined Exhaust RunnerYes
Vendor Part Number79899
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
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