http://www.moparmax.com/columns/magnante/vii_1-7.html ???? dont think ive ever seen this one before.

Compromise on the billet.......

Make a mold that's solid and big enough to CNC.


Reuse the cutoff aluminum for the next pour...........

They can print those now.

Seems to me that the biggest cost savings would be in duplicating the Argentinian Head and having it cast in Aluminium. But at the cost of all that, I'd be far more interested in a raised port design that really evolved the engine to the next generation. There is no reason that we shouldn't be able to get significantly more power out of the engine with a really good flowing head. Due to weight and currently attainable power output levels the slant will be a dying breed if we can't find a way to revitalize the platform. It's getting much too cheap to build a 273 or 318 to much higher levels at the same cost. I think at most times we build these engines just because we dare to be different.

Even making the patterns the old fashioned way takes a lot of specialized knowledge and skill that is often overlooked and not realized. While cutting up some old heads can give you a general idea of certain things, its the unseen or undetectable details that often lead to failure or unusable castings. One thing that has to be accounted for is the shrink allowance of the aluminum has to be factored into the pattern size as well as the extra material added to all the areas that get machined. Patterns for parts to be cast in aluminum need to be about 2-3% longer, thicker and wider on all the features being cast or the casting will not fit on the intended block because it will shrink beyond its intended sizes due to the shrink allowance not being taken into consideration. So if you took an existing cylinder head and tried to use it as a pattern, once you poured the aluminum and it cooled, the finished casting would be about .300" shorter than the head you used as the pattern.

the slant will be a dying breed if

I just heard on the news that Australian scientists have made the world's first airplane engine that was printed on a 3-d printer.

http://www.reuters.com/article/2015/02/ ... 9C20150226

If the Aussies can print a whole engine, why can't we print a head? I have done zero research into the costs of 3-d printing metal or plastic engine parts, so maybe I am just waaay off base.

"damnation! I just hit the print 100 buttom ! "

first, applause to 67 Dart 270 for starting a thread that goes 6 pages +
what does that say?