SpecsBrand: SpeedmasterPart Number: PCE281.1724Part Type: Cylinder Head [Bare]Cylinder Head Style: BareCylinder Head Material: AluminumCylinder Head Finish: NaturalCombustion Chamber Volume (cc): 71 ccCNC-Machined Combustion Chamber: YesIntake Runner Volume (cc): 235 ccExhaust Runner Volume (cc): n/aCNC-Machined Intake Runner: YesCNC-Machined Exhaust Runner: YesIntake Port Shape: RectangularIntake Port Location: Standard 3V (4v with tongues)Exhaust Port Shape: RectangularExhaust Port Location: RaisedSpark Plug Style: StandardComp. Valve Job: NoIntake Valves Included: NoIntake Valve Diameter (in): 2.190 in.Exhaust Valves Included: NoExhaust Valve Diameter (in): 1.710 in.Valve Springs Included: NoDamper Spring Included: NoRetainers Included: NoLocks Included: NoValve Stem Seals Included: NoRocker Arm Studs Included: NoRocker Arms Included: NoRocker Arm Nuts Included: NoGuideplates Included: NoValve Cover Mounting Style: Perimeter BoltAccessory Bolt Holes Drilled: YesIntake Valve Angle: StandardExhaust Valve Angle: StandardValve Guides Included: YesValve Guide Material: BronzeValve Seats Machined: YesValve Seat Machine Style: 3-angleValve Seat Material: Ductile ironSteam Holes Drilled: NoOiling Style: Through pushrodMachined for O-Ring: NoHeat Crossover: NoQuantity: Sold individually.Notes: Exhaust port raisedDescriptionThe Speedmaster Ford Cleveland 3v heads are a perfect upgrade for both 2 and 4 barrel engines. We have re-designed the intake ports by raising the floor to help cut down on the massive cross-section that hampers OEM 4 barrel heads. Not only do you get more performance out of the box than OEM heads, our heads are significantly lighter since they are made of \"Gravity Die Cast\" aluminum. As another benefit, you can run higher compression with aluminum heads before the onset of power robbing detonation. There is absolutely no reason to rebuild a set of OEM castings when you can buy a lighter, higher flowing and more detonation resistant cylinder head for less money from us! To top it all off, we offer CNC ported Cleveland heads for people looking for even more performance.
INTAKE / EXHAUST GASKETSDue to the unique raised port of the Speedmaster 3v head, the only intake gaskets readily available are Speedmaster PCE349.1001 which measure 1.73(W) x 2.140(T) with the floor of the port 1.220\" up from the deck of the head.
The exhaust side of the head uses standard 4v exhaust gaskets. You can use Speedmaster PCE355.1010 or Fel-Pro 1416 header gaskets which measure 1.89\" (W) x 2.19\" (T).
HEAD GASKETSThe Speedmaster PCE281.1703, PCE281.1714, PCE281.1724 and PCE281.1726 cylinder heads use the following head gaskets for use with 351C block:
Speedmaster PCE348.1005 (MLS 4.055\" gasket bore)Fel-Pro 1013 (Composite 4.100\" gasket bore)
Both gaskets are .040\" thickness when compressed.
HEAD BOLTS / STUDSThe Speedmaster Cleveland 3v heads require specific head studs that are longer than standard.
Use Speedmaster PCE279.1014.These studs should only be finger tightened into the block. Torque the nuts to 65lbs. using high pressure moly lube, in increments of 15lbs.
SPARKPLUGSOur Ford Cleveland cylinder heads require the use of a 14mm. thread 5/8\" hex, .750\" reach spark plugs. Below you will find a list of some plugs that fit and work with our heads:
NGK - BCPR6ES, R5671A-7, R5671A-8Autolite - 3923, 3924, AR3933, AR3934Champion - RC12YC, RC10YC4, RC9YC3
Remember that you need a COLDER plug when you make more power, ie. N2O, Turbo and supercharging.
Air Flow Data:
Lift (Inch) Stock Intake Exhaust Ported Intake Exhaust0.200 75 86 120 1100.300 122 127 173 1470.400 180 165 225 1760.500 234 175 270 1980.550 256 185 291 2040.600 270 195 308 2100.650 279 199 341 2160.700 284 201 352 220All tests were done on a SuperFlow SF-1020 at 28 inches of water column. **The flow numbers for many of our other heads were measured on an SF-600, which are generally much higher.**
