Dart 10711143P - Dart SB-Chevy Iron Eagle Platinum Series Cylinder Heads
Dart #301-10711143PSB-Chevy Iron Eagle Platinum Series Cylinder Head, |
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Dart 10711143P - Dart SB-Chevy Iron Eagle Platinum Series Cylinder Heads Details
64cc Combustion Chamber, 230cc Intake Runner Cast Iron Heads
Specifications: Combustion Chambers: 64cc
Intake Valve Dia.: 2.08''
Intake Port Volume: 230cc
Intake Port Dim.: 2.180'' x 1.210''
Int Port Location: Stock
Intake Gasket: Fel-Pro 375-1206
Exhaust Valve Dia.: 1.60''
Exh Port Volume: 75cc
Exh Port Dim: 1.375'' x 1.325''
Exh Port Location: Stock Location and Bolt Pattern
Exhaust Gasket: Fel-Pro 375-1404 or 1405
Flow, Intake: 308cfm @ .700'' Lift
Flow, Exhaust: 207cfm @ .700'' Lift
Head Bolts: ARP 070-134-3601
Head Studs: ARP 070-134-4001 or 234-4301 (12pt)
Manifold: Aluminum Single Plane (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
Push Rod Length: Stock thru +.100'' should always measure (Stock Length = 7.800'')
Push Rod Guide Plate: Must use Comp Cam 249-4808 (Flat)
Retainers: Steel 10° (+.050'' lock and retainer)
Spark Plug: Angle, .460'' reach, tapered seat, Champion V59C/V59YC
Spring Pockets: 1.550'' OD (.030'' deeper max)
Springs: 1.550'' Double Spring, 195lbs seat pressure @ 1.900'' installed height / .690'' max lift, Comp Cams 249-954
Stud Girdle: Use any standard girdle
Valve Length: Standard 5.015'' (+.100'')
Valve Stem Dia.: 11/32''
Valve Train: Standard SBC 3/8'' (or can be changed to 7/16'') stud mount
Valve Guides: 1/2'' OD Int = Mag-bronze, Exh = Phos-bronze (.002'' press)
Valve Guide Length: 2.100''
Valve Guide Clearance: .0014'' - .002'' (with 11/32'' valve stem)
Valve Guide Spacing: 1.890'' moved .030'' from stock
Valve Seats: Exh = Hardened Ductile Iron, .006' press
Valve Seat Dim: Exh = 1.650'' x 1.350'' x .350''
Valve Seat Angles: Int = 32° - 45° - 60° - 70°, Exh = 37° - 45° - radius
Torque: Head Bolts = 70ft/lbs; Rocker Studs = 45ft/lbs; Manifold = 35ft/lbs
Block Use: Any SBC Iron or Aluminum
Weight: 52lbs
10% More Air Flow Than The Original Iron Eagle Heads! In 1997, Dart revolutionized the small block cast iron cylinder heads market with the release of the Iron Eagle. Now, Dart gives you the next generation Iron Eagle known as the Platimum Series. Using proprietary Speed Flow technology, Dart has developed more efficient port designs with improved velocity and flow capabilities. Computerized modelling and physical testing have been employed to produce the premier cast iron cylinder head on the market today. The combustion chamber has been redesigned for greater breathing characteristics and more controllable combustion. Dart's casting techniques have been enhanced to reduce potential core shift, and to improve dimensional accuary. This has allowed Dart to design profiled valve guide bosses for higher flow rates. Casting walls are cleaner and more consistent, resulting in greater control over flow, heat and combustion. Other features include:
