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Dart Pro 1 Small Block Chevy Aluminum Cylinder Head 11711143P DRT-11711143P 301-11711143P

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Cylinder Head, Pro 1, Aluminum, Assembled, 64cc Chamber, 230cc Intake Runner, Chevy, 327, 350, 400,  SOLD EACH

Part Number 11711143P (1 HEAD)

PLEASE PURCHASE 2 TO MAKE A PAIR FOR YOUR MOTOR

DART PRO1 ALUMINUM SMALL BLOCK CHEVY HEAD

 

SB-Chevy Pro 1 Aluminum Cylinder Heads
  • 230cc Intake Ports
  • 64cc Combustion Chambers
  • 2.080'' Int/1.600'' Exh Valves
  • 1.550'' Valve Springs, 195lbs @ 1.900''
  • .690'' Max Lift
  • Angle Plugs
  • Assembled,
  • Sold Individually

Specifications

Material: 355 T-6 Aluminum Alloy
Combustion Chambers: 64cc
Intake Valve Dia.: 2.08''
Intake Port Volume: 230cc
Intake Port Dia.: 2.180'' x 1.210''
Intake Port Location: Stock
Intake Gasket: Fel-Pro 375-1206
Exhaust Valve Dia.: 1.60''
Exhaust Port Volume: 75cc
Exhaust Port Dim.: 1.375'' x 1.325''
Exhaust Port Location: Stock Location & bolt pattern
Exhaust Gasket: Fel-Pro 375-1404 or 375-1405
Intake Flow: 308 cfm @ .700'' lift / 28''
Exhaust Flow: 207 cfm @ .700'' lift / 28''
Head Bolts: ARP 070-134-3601
Head Studs: ARP 070-134-4001 or 070-234-4301
Manifold: Aluminum Single Plane Manifold (opening - 1.100'' x 2.000'') 5.500'' Tall
Milling: Min. 58cc = .060'' (.0065'' = 1cc) Flat Mill Angle mill .125'' safely / .200'' = 49cc 1.5° (carefully)
Pistons: Most 23° aftermarket pistons
Pushrod Length: Stock thru +.100'', Should always measure (stock length = 7.800'')
Pushrod Guide Plate: Comp Cams 249-4808-8
Retainers: Steel 10° / 1.250'' (7°)
Spark Plug: Straight, .750'' reach, gasket-seat
Spring Pockets: 1.550'' OD (.030'' deeper max)
Springs (Not Included): 1.250'' = 110lb @ 1.700'' / .520'' Comp 249-981-16; 1.437'' = 130lb @ 1.800'' / .620'' max Comp Cams 249-987-16; 1.550'' = 195lb @ 1.900'' / .690'' max, Comp Cams 249-954-16
Stud Girdle: Use any stud girdle
Valve Length: Standard 4.890'' w/1.250'' & 1.437'' (+.100) w/1.550''
Valve Stem Dia.: 11/32''
Valve Train: Standard SB-Chevy 3/8'' Stud Mount
Valve Guides: 1/2'' OD Int = Mag-bronze, Exh = Phos-bronze (.002'' press)
Valve Guide Length: 1.950''
Valve Guide Clearance: .0014'' - .002'' (with 11/32'' valve stem)
Valve Guide Spacing: 1.890'' moved .030'' from stock
Valve Seats: Hardened ductile iron, .006'' press
Valve Seat Dim: Int - 2.160'' x 1.810'' x .350'', Exh - 1.650'' x 1.350'' x .350''
Valve Seat Angles: 32° - 45° - 60° - 70°, Exh - 37° - 45° - radius
Torque: Head bolts = 70ft/lb; Rocker studs = 45ft/lb; Manifold = 35ft/lb
Block: Any SB-Chevy iron or aluminum
Weight: 23lbs

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