| Blue Thunder FE Cylinder Head Tech Data - Updated! A bolt on replacement for production heads, designed to flow much better than stock, and allows flexibility with further modifications. The medium riser head is usable with minor bowl and port clean up. It has approximately .300” port wall for porting, but does not require CNC porting. These look similar to stock heads from the outside. The high riser should be ported for best results. Cast at aircraft foundries using Alcoa A356 aluminum with a T-6 certified heat treat, a stainless steel shot blast finish, and high quality machined surfaces. All Blue Thunder cylinder heads are pressure checked to 60psi. Thick (.650”) deck surface for structural integrity and future cutting to adjust chamber size. Features standard bolt hole locations on ends of heads for easy accessory mounting, and a hidden boss designed to allow water fittings on the end of the heads if necessary. Exhaust ports are raised .400”. Uses standard 427 bolt pattern or 428 CJ pattern. Production type intake and exhaust manifolds can be used with these heads. Two different intake ports are offered - - medium riser and high riser. (Note: you will need to port match the manifold you are using). The medium riser is large and can be run as cast. Standard features include Time Serts, (a threaded solid steel bushing (not a spiral wire) to keep bolts from stripping out of the aluminum). Head bolt seats to prevent the head of the bolt from distorting the aluminum while fastening, and 10 hardened & ground flat washers. Supplied with interlocking ductile iron intake, and exhaust seats and manganese- silicon-aluminum bronze guides (undersized .0015” for diamond honing). All guides and seats are thermally pressed using liquid nitrogen to preclude metal displacement during installation of guides and seats. Two available chambers; a modern quench/heart shaped chamber, and a fully machined Medium Riser chamber. Blue Thunder FE heads are machined to high rise height for potential porting. Uses high rise valve train geometry, and components. “.100” material added to the top of the medium rise rocker and spring pads, and .200” material added to the top of the high rise rocker and spring pads. (This is for the engine builder to work the valve train geometry.) |
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| Complete CNC Porting is Available for $1500 - - Blue Thunder Cylinder Head Flow Data |
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