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.)
Blue Thunder Ford Cylinder Head Big Block FE 390-427-428 Medium Riser-small bore-quench chamber
$797.50
Complete CNC Porting is Available for $1500 - - Blue Thunder Cylinder Head Flow Data
Manley Custom Exhaust Valves
$218.00
Manley Intake Valves
$218.00
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