CFE 14 DEGREE SPREAD-PORT
4.840 BORE SPACED | BBC | SPREAD-PORT
The CFE 14-degree Spread-Port head is perhaps the most diverse of any of our Pro Stock style cylinder heads. Available with several different porting programs of both oval and rectangular port designs and various valve diameters to accommodate the engine’s bore size. Engine displacements ranging from 430 to 706 c.i.d. have been built using this head. Even with such diversity in combinations all of the CFE 14 degree Spread-Port heads use most of the same assembly components except for pistons due to valve diameter options.
Oval Port Programs are designed for smaller displacement engines (under 600 c.i.d.). Applications vary from super-category throttle stop racing to moderate nitrous use.
Square Port Programs are designed for large displacement engines (over 600 c.i.d.). CFE fabricated manifold is recommended.
Popular Applications Include Top Sportsman, Top Dragster, throttle-stop racing, blown alcohol, turbocharged, drag boats, and truck/tractor pulling.
| Cylinder Head Specifics | |
|---|---|
| Intake Valve Diameter | As large as 2.480″ |
| Exhaust Valve Diameter | As large as 1.880″ |
| Chamber Volume | 82cc @ 4.600 Bore |
| Seats | Available with Ductile Iron or Alloy Seats |
| Guides | 11/32″ valve guides are standard, 5/16″ guides are available upon request. Alloy guides are standard. |
| Exhaust Flange | Uses a standard Big Block Chevy header/exhaust flange. |
| Cooling Provisions | The CFE 14 degree Spread-Port head has cooling provisions on the intake flange. |
| Cylinder Head Requirements | |
|---|---|
| Minimum Bore | 4.500″ (custom versions are available for bore sizes less than 4.500). |
| Intake Manifold | Cast 1×4500 manifolds available for 9.800″ and 10.200″ deck heights. CFE fabricated manifolds available for various applications. |
| Valve Cover | Uses a standard Big Chief valve cover and valve cover gasket. |
| Spark Plug | 3/4″ Reach Gasketed Spark Plug |
| Rocker Systems | Jesel KPS-21194, TD 3031 |
| Head Stud Kit | ARP 235-4312 |