Reply to "Compression too high?"

DOAE heads are closed chamber and have a 63cc +- combustion chamber. The engine shop is doing an actual volume measurement of my heads since they have been milled and also have aftermarket valves.

I do not have the proper tools or skill set to accurately measure crank shaft stroke myself. The aftermarket stroker cranks are stamped with stroke length. If my crankshaft is stock with an offset grind as George suggested then the shop will have to measure its stroke length.

When I measured cylinder bore with my telescope gauge and digital micrometer, I came up with 4.025 which seems unusual. Most rebuilt Cleveland engines have a 4.030 bore. I am glad the professionals will be looking at it.

It takes special equipment to measure volume of the dome on the piston. At this point most of us are thinking that the domed pistons will cause a higher compression ratio than is incompatible with today's pump gas. I am not sure what the engine builder was thinking when he ordered those pistons since the engine would need high octane gas. The engine may have been built 15 or 20 years ago.