Originally posted by HELLION
My little CNC machine won't be here till next week so I don't have any samples. That and I would make sure that it was a working unit before I would post samples. This is just something I have been wanting to do for a long time and now I will be able too. and Top gun do you really believe a casted piece would be better then a forged piece I can give you a list of reasons a forged piece would be better (a lot better) the only advantage of a cast piece that I can think of is cost. To me casting is low technology compared to forging. A simple example would be a fan out of a turbo charger Or here's a better example let's say you want to soop up the real car you are driving by building the engine for high performance. The high performance pistons you would use would be forged . The pistons that where in your engine that are now probley in the trash can are cast pistons 
Hellion.
I would suggest you first start from make piston/sleeve set ( whatever you want to use there-casted, forged, glued etc). Then I would recomend try to make cranckshaft, then last step will be crancase.
I think you little bit underestimated my abilities.
What are you learning now, I pass succesfully about 20 years ago. You are talking about high performance pistons for race cars and this is nothing to compare pistons from military tanks. Those made by powder metall technology ( now known as MCP). We went through it long time ago.
One more thing I will sugest you-don't convert real car's engines and designs to our stuff. Our stuff is realy complecated and it is not that easy as it looks like. Don't waist your time trying to use the same technology from real cars racing in RC-will not work.
I realy respect you for trying create something yours, just try to warn you-we did all this stuff in the past-don't make our mistakes.
About crancases-there is much more invole then you can immaging. In real car if the case is screwcked-you will never fill it ( due to the tolerances) and in our cases if screwcked 0.01 mm-it is realy big deal. Not every Al alloy wich has suitable tech properties for crancases will be easy to forge.
Any way, welcome to motor world. let me know when you are going to need real help, not just blah-blah and I will help you.
Edward