http://realfierotech.com/phpBB/viewtopi ... =9&t=18065
the heads!
![Image](http://i473.photobucket.com/albums/rr98/ericjon262/car%20shit/R07/KIMG0009%202.jpg)
![Image](http://i473.photobucket.com/albums/rr98/ericjon262/car%20shit/R07/KIMG0008%202.jpg)
CNC intake ports
![Image](http://i473.photobucket.com/albums/rr98/ericjon262/car%20shit/R07/KIMG0014.jpg)
![Image](http://i473.photobucket.com/albums/rr98/ericjon262/car%20shit/R07/KIMG0011.jpg)
CNC exhaust ports.
![Image](http://i473.photobucket.com/albums/rr98/ericjon262/car%20shit/R07/KIMG0013.jpg)
![Image](http://i473.photobucket.com/albums/rr98/ericjon262/car%20shit/R07/KIMG0012.jpg)
the heads don't have any large oil drains to allow oil to drain back to the valley. there are two small drains, both with restrictions installed to limit flow. one is in the first cylinders exhaust valve spring pocket, the other in the last. you can also see the marks left by the rocker stands. these engines use shaft mount rocker arms, which are bolted to stands that are bolted to the heads. from what I have seen there are at least 2 types of stand, a multi-piece, and a single piece, from what I can see, it appears this set used the single piece design.
![Image](http://i473.photobucket.com/albums/rr98/ericjon262/car%20shit/R07/KIMG0004.jpg)
![Image](http://i473.photobucket.com/albums/rr98/ericjon262/car%20shit/R07/KIMG0008.jpg)
interesting notes here, each head has 3 dowel pin locations, one in the middle outboard head bolt, and on in each corner inboard head bolt. the middle pin location is slotted vertically, and outer two are slotted horizontally, maintaining the head in position but still allowing for thermal expansion.
![Image](http://i473.photobucket.com/albums/rr98/ericjon262/car%20shit/R07/KIMG0005.jpg)
![Image](http://i473.photobucket.com/albums/rr98/ericjon262/car%20shit/R07/KIMG0006.jpg)
![Image](http://i473.photobucket.com/albums/rr98/ericjon262/car%20shit/R07/KIMG0007.jpg)
coolant enters the head through one large passage on the outside of the "V" and 6 smaller holes. coolant exits under each intake port to the radiator in a water manifold. coolant inlet is at about 7 o'clock, the outlet is at about 1 o'clock. note, in the picture you can see all three head dowels.
![Image](http://i473.photobucket.com/albums/rr98/ericjon262/car%20shit/R07/KIMG0009%203.jpg)
The heads use 6 bolts per cylinder to attach the head to the block. if you look here, on the left, there is a threaded hole, that is the 6th bolt hole, it threads into the head from the lifter valley instead of from the top and into the block.
![Image](http://i473.photobucket.com/albums/rr98/ericjon262/car%20shit/R07/KIMG0002.jpg)
![Image](http://i473.photobucket.com/albums/rr98/ericjon262/car%20shit/R07/KIMG0002.jpg)
the small hole in the front corner of the head is a oil passage. the valve covers have an integrated spring oiler passage to keep the springs cool at 10,000 RPM.
![Image](http://i473.photobucket.com/albums/rr98/ericjon262/car%20shit/R07/KIMG0010%202.jpg)
The valves are Ti, and at slightly different angles. the intake valves use 6MM stems and are ~2.20" diameter, and the exhaust uses 7MM stems and are ~1.60". another interesting note, the edge of the intake valves is below the deck surface, take care when handling heads with valves installed to not let the deck slide on anything.
![Image](http://i473.photobucket.com/albums/rr98/ericjon262/car%20shit/R07/KIMG0010%203.jpg)
![Image](http://i473.photobucket.com/albums/rr98/ericjon262/car%20shit/R07/KIMG0009%204.jpg)
![Image](http://i473.photobucket.com/albums/rr98/ericjon262/car%20shit/R07/KIMG0008%204.jpg)
I will update this as I acquire parts, and as I begin the build.