No shrinkage due to mold preheat and smaller bore. I also found that the small end of the tapered bore worked best facing down.
This is the goofy look of pure bliss! After having spent a few weekends altering my permanent mold I worked out the kinks.
Here's a view of the fins which I incorporated into the mold. They will only require a small amount of machining to be finished. Wish I could say the same for the valve guide areas.
Here you can see the GREATLY enlarged feeder. I was afraid that it would come to this but wanted to try casting something which required less machining first. The general rule is that feeders need to be as thick or thicker than the body they are feeding. As the casting cools and the metal inside shrinks the feeder remains liquid and keeps the casting from having defects.
Some 3D pictures of what the head should look like when it's done. Yes, there is some interference in the exhaust gasket but that will be machined to fit when it's made.
