Join Date: Jan 2008
Location: Seattle, WA area
Re: On to the angle milling
You have the idea, but what we used was direct port matching using templates that are indexed with pins. You also would use the index holes to install the intake for perfect alignment. To do this, you fully install the intake on the short block in the best position with the 'wiggle' room you have. Then use an angle drill and 1/8" bit through the intake flange and just into the head face between the ports - maybe 1/8" deep. Two index holes per head.
You can now use roll pins or music wire/welding rods to locate all 3 parts in perfect alignment every time. Remove the intake and replace the gasket with a blank made of poster board. Here is where different techniques are used by different folks.
A) Carbon the head and intake faces and reassemble to make a print on the blank. (Port blending)
B) Just align with the primary port (head dictates the port size and shape primarily) and cut-out the blank to match the ports. (Port matching)
Either way, you are crating an indexed pattern to remove or replace material on the intake with. Without going further, does that help with the concept?
[EDIT] PS: The index holes don't have to be perpendicular nor centered - just intersecting intake/gasket/head for alignment.
-=≡ If it was easy everyone would do it ≡=-
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