Hold the phone everyone.......the data given is not complete enough. You can't just calculate CR from the apparent 2.4 cc's measured above-deck volume, because there is also below-deck volume at TDC. The reason I say all of this this is because the Egge dome volume in not 2.4 cc's, (which is the flat-top .500" down-in-the-hole volume minus the measured down-in-the-hole volume). There is some volume info that we are missing.....I thought that might be the case.
DR, how did you measure how far down in the bore the piston was when you did the in-block cc-ing? Did you use a dial indicator or a caliper or? Dial indicatorAnd did you measure from the flat top of the piston for the .500" or where? From the top of the dome.This accuracy and where you measured is critical to your results. (And did you seal the edges of the piston top with clay when cc'ing .500" down in the hole?) I sealed the piston with lubriplate at the edges of cylinder.
How far down below deck is the flat part of the piston when at TDC? That is hard to determine, I could choose what I think is the flat part and dial indicate it.We could work from the Egge compression height number but any block decking info would be missing from the equation. No, I am all about doing the work at this point.
Your cam closing number looks incorrect. I am getting 56* ABDC; that is based upon the advertised cam specs.