George, this doesnt explain why my own heads, that have been made and run successfully on .10/.15 on up to over 2 cubic inches have all run fine. I made my first diesel conversion in the early 90's when I got my first lathe (I still have it, it was for an old Fox engine I had) and have allways made the squish band flat. None to my knowledge have run hot, or abnormally. Also, I made quite a few with the contra pison the same diameter as the cylinder bore, ie, no squaish band.

I dont personally think that the squish band plays a big role in the diesel as it does in the glow plug ignition engine. Bu like I stated previously the only way to test this is to take an engine, make a few heads with the only variable beig the squish band angle, and see how they run...

AJC