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How thick is a compressed head gasket? (c/r calculation)

I need to know what thickness the head gasket is when it's compressed. 
I'm using a 2.0 16V gasket on my 2.0 ABA/JH swap that measures 2.0mm
thick uncompressed.

The other numbers I got were:

head combustion chamber volume: 25.5 cc  (shaved .035" - .040")
deck volume (piston TDC)      : 17.75 cc (2.0 ABA block, stock)
                          Bore: 83mm
                        Stroke: 92mm

Some calculations I got were:

With 2.0mm gasket: 10.2:1
    1.75mm gasket: 10.44:1
    1.50mm gasket: 10.7:1
     1.0mm gasket: 11.2:1

Seems too low for the amount I ended up getting shaved off the head...

Thanks!

Mark. (making sure I don't have a 18:1 compression ratio!)
81 S ABA/JH/4K

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