Compression ratio after milling heads.

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Jun 24, 2005 | 03:09 PM
  #1  
My heads are at 60cc now. I am running the thin copper FelPro head gasket.

Any idea on my compression ratio?

This is on a stock 1988 L98 short block.
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Jun 25, 2005 | 12:35 PM
  #2  
Please define "thin" What is the compressed thickness of the copper head "templates"? I hesitate to use the term "gasket", since it probably won't be one of those for very long.

With exact head gasket compressed thickness, deck height, piston dome/dish volume, bore, gasket bore, and chamber volume, I can give you a nearly exact static compression ratio.

Or, you can find it for yourself:

Engine Calculations.xls If you can use an Excel spreadsheet, it's fairly close.
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Jun 25, 2005 | 12:38 PM
  #3  
FelPro preflattened copper head gasket.

.039" compresed thickness.

Stock short block. Stock pistons, untouched.
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Jun 25, 2005 | 07:29 PM
  #4  
I'll take a WAG. How about 9.4:1.
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