EDV is the Effective Dome Volume, and as I understand it, normally becomes a negative number for the part of the piston that sticks above the deck. I used United Engine & Machine's on-line calculator with the numbers I generated, as well as .036 EDV and a valve relief of 7.5cc ( a figure I found for these pistons) and it produced 10.2+ and 10.3 respectively. I used a 4.180 x .040 gasket, at 8.9cc every time. My heads are the factory type, with Ferrea nail head valves and hardened seats installed. At first I thought I had confused my start amount in my burette (20 vs. 25), but after checking 3 more chambers, they are all within .3cc. I used the blueprint pictured when measuring the chambers, and they came out at .706 to.711. It looks like the heads have only had a cleanup? I haven't picked a cam yet, was thinking a pump gas friendly DCR (low 8's?) would play a big part in that. The motor will be for a street-only car (if I keep it).
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