Target compression ratio A/J

Marcohotrod said
why does dial indicator say .068" ? I would throw a rod and piston from one side in to the other side, just in case you have the short ones all on 1 side (probably the block is the reason 1 side averages .010" different) Then just cut 1 head .010" to even out the compression ratio. what is the piston part number-look up valve notch cc. how much compression ratio you can run depends on many factors! closed chamber heads? run a thin gasket to get some quench

It just wasnt at the top when I took the photo.

I may be mistaken but I thought pistons cant be switched around like that on a BB cause of pin offset.Hopefully someone can confirm or deny that.

IQ52 said
Zero deck huh? As your pistons are, cut the odd side .013" and the even side .022"

Now you have as deck heights.........

1) .001 2) .001

3) .000 4) .000

5) .002 6) .003

7) .002 6) .002

Then with an 84cc combustion chamber, 7cc valve reliefs, .039 8519PT1 head gasket, you have for compression ratios........

1) 10.13 2) 10.13

3) 10.15 4) 10.15

5) 10.11 6) 10.09

7) 10.11 8) 10.11

It's unlikely that the combustion chambers will all be 84cc but, still, close enough.

Would you explain to me what you meant by this if anything Quote: Zero deck huh?

Sounds like a problem somewhere to me.

Thanks for the figures.

I measured small block set of Edelbrock heads and unless there is a different way to measure the CCs that is more accurate than what I had done then Ill say that the small block heads came up showing same combustion number sizes.