CFE NITROUS SPECIALS
4.840 BORE SPACED | BBC | SPREAD-PORT
CFE 18-degree Nitrous Specials incorporate all the same great features as our standard 18-degree spreadport head with additional influences from our record-setting five-inch-bore-spaced promodified heads. Custom chamber design and valve locations enhance not only the performance of the head but also allow for a much-improved piston design for nitrous use. This head is available in both 4.840 and 4.900 bore spacing and will require a custom piston design specific to the CFE Nitrous Special. Competitive programs are available to support engine ranges from 598 c.i.d to 706 c.i.d. CFE also offers manifold-specific programming for either cast or fabricated intakes allowing for a completely custom racing head solution.
CFE Nitrous Specials can take advantage of most of your existing 18-degree Big Chief components such as head studs, gaskets, rocker arms, and valve covers.
Popular Applications Include: Dedicated nitrous engines campaigned successfully in Top Dragster, Top Sportsman, heads-up street car racing, Bonneville (land speed competition), and mud racing.
| Cylinder Head Specifics | |
|---|---|
| Intake Valve Diameter: | 2.400″ |
| Exhaust Valve Diameter: | 1.880″ |
| Chamber Volume: | 97cc |
| Seats: | Alloy intake and exhaust seats are standard |
| Guides: | 11/32″ alloy guides on both the intake and exhaust or standard. |
| Exhaust Flange: | Accepts a standard Big Block Chevy header. |
| Cooling Provisions: | The CFE 18 degree Big Chief head has cooling provisions on the intake flange. Coolant holes for a -16AN fitting can be added to the end of the casting upon request. |
| Cylinder Head Requirements | |
|---|---|
| Minimum Bore: | 4.600″ |
| Intake Manifold: | Cast single dominator or tunnel ram manifolds are available for 9.800 or 10.200 deck heights. |
| Exhaust Lifters: | Qty 8 @ on-center |
| Valve Cover: | Requires a standard Big Chief valve cover and valve cover gasket. |
| Shaft Rocker System (required) | |
| Jesel: | KPS-23097 |
| T&D: | 3036 |
| Head Stud Part Number: | 235-4312 |
| Spark Plug: | 3/4″ reach gasketed spark plug |
| Assembly Components: | Call for details |