Understood....!
Yes, I was. I thought that was what he was referring to. The dome of his head. Now, it's all clear. With one exception. If I'm not mistaken, because I'm no expert either, the liquid measurement would be in ml's (millimiters) which is a liquid measurement, not cc's (centimeters) which is a unit of measurement by length or area.
But I do see what you mean now.
In the day of removing the standard flat-tops and going with a set of "pop-up" pistons for my 350 cu.in., we changed the connecting rod to change the stroke and create the room needed for the domed pistons...........we never made any liquid measurement of the volume in the cylinder. I guess that's because by the standards of building a 4 cycle V-8, it was already known and additional horsepower pre-calculated as to what you were going to get before you put it together.
But I do see now, what it is that he's trying to accomplish. Makes good sense to do it when working with the 2 stroke, because it doesn't have an intake and exhaust valve to help with lag to build compression by changing the cam shaft duration............
O.K..........thanks DAWG, I got it now.............:cheers:
BTW, I still don't see a need to make these damn engines any hotter than they already are. As many engines as I built, I don't think any of them lasted more than a year with the street racing I did. So, if your gonna make these kind of changes to a PWC, I just can't justify that extra $, unless there was profit in it, like racing...................:cheers: