18 DEGREE N2O SPECIALS SPREADPORT BBC
About CFE 18 Degree N2O Specials Spreadport BBC HeadsCFE 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 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 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" | | Combustion 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 rocker arm kit #: | KPS-23097 | | T&D rocker arm kit #: | 3036 | | Head Stud Part Number: | 235-4312 | | Spark Plug: | 3/4" reach gasketed spark plug | | Assembly Components: | Call for details |
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