Reher-Morrison Dart 15º SBC Cylinder Heads

SBC15DegDartHead

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Product Description

Specially prepared by Reher Morrison for our Super Series 840hp 427cid SBC

Material: 355T6 alum alloy
Chambers: 48cc – Tit valve w/CNC
Intake Valve Dia: 2.180”
Intake Port volume:  Full Port 285cc
Intake Port Dim: 2.165”x 1.315”
Int Port Location: Raised, 5°
Intake face (stock = 10°)
Intake Gasket: Mr Gasket# 143
Exh Valve Dia.: 1.600”
Exh Port volume: Full Port 118cc
Exhaust Port Dim:  Full Port 1.820”w x 1.515”
Exh Port Location:
Raised & spread port, GM & Stahl spread pattern
Exhaust Gasket: Spread port or Stahl pattern
Flow, Intake: (F/P std) – 400 cfm @ .800 lift / 28”
Flow, Exhaust: (F/P std) – 265 cfm @ .800 lift / 28”
Lifters:  .180” offset required
Manifold: Dart 18° single plane, 5 ° face (1.120”x 1.960”) 6.50” tall (std deck 4150)
Milling: Min. 38cc / .065” (.0065” = 1cc) Flat mill only.
Pistons: Most 15 °
Push Rod:  Should always measure (Clearance not machined)
Retainers: Titanium (10 deg)
Rocker Arms:  Shaft Rocker Assemblies for Dart 18º SBC head
Spark Plug: Angled .750” reach, gasketed. Autolite AR3932
Spring Cups: 1.550” – ID locator
Spring Pockets 1.550” OD (.030” deeper max) can go to 1.625” but no deeper
Valve Angles: 15°
Valve Guide Spacing: 1.935” Valve Seats: Ductile Iron or Copper-Berylium, .006” press
Valve Seat dim. Int. – 2.250” x 1.850” x .375” Exh – 1.680” x 1.350” x .375”