Dougs 67 Notch build
As I am getting ready to assemble the engine it has been deemed imporntant to know the static compression ration (SCR) and the dynamic compression ratio (DCR). Thanks to all who helped straighten me out in my "Getting Worried" thread. It looks like the concerns are justified as when I chose my cam, I focused on lift and not duration. Lesson learned. In any case, below are some photos of todays work in the shop CC'ing the combustion chambers of my 273 closed chamber heads. Happily I now know that 6 of them are 62.5 CC's and 2 of them are 62.75 CC's. I had to do everything twice as the plastic would not hold without bolts and grease was a no go. I drilled the plate for bolts and used chapstick to seal and it all worked well. Next step to do the 1" down test for the domed pistons after the rotating assembly is in the block. Building cars & engines is hard------sounds like some of my employees at work:)
Cheers and thanks to all, DR:coffee2:
View attachment CCheadsAA.jpg
View attachment CCheadsA.jpg
View attachment CCheads1.jpg
View attachment CCheads2.jpg
View attachment CCheads3.jpg
As I am getting ready to assemble the engine it has been deemed imporntant to know the static compression ration (SCR) and the dynamic compression ratio (DCR). Thanks to all who helped straighten me out in my "Getting Worried" thread. It looks like the concerns are justified as when I chose my cam, I focused on lift and not duration. Lesson learned. In any case, below are some photos of todays work in the shop CC'ing the combustion chambers of my 273 closed chamber heads. Happily I now know that 6 of them are 62.5 CC's and 2 of them are 62.75 CC's. I had to do everything twice as the plastic would not hold without bolts and grease was a no go. I drilled the plate for bolts and used chapstick to seal and it all worked well. Next step to do the 1" down test for the domed pistons after the rotating assembly is in the block. Building cars & engines is hard------sounds like some of my employees at work:)
Cheers and thanks to all, DR:coffee2:
View attachment CCheadsAA.jpg
View attachment CCheadsA.jpg
View attachment CCheads1.jpg
View attachment CCheads2.jpg
View attachment CCheads3.jpg