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Old Apr 29, 2007 | 11:43 PM
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roger dowty's Avatar
roger dowty
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From: western montana
oz head 57cc

measured the combustion chamber on my oz 2v and they are right at 57.

I've seen them advertised as 57 and 60 and 62.
whats up with that? It's a pretty big diff compression wise.

I took them off after figuring out the valve train geometry for the final time. Wanted to put better head gaskets on and measure them as I forgot to do that.
 
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Old Apr 30, 2007 | 12:18 AM
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73XAFalcon
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From: Sin City, USA
Originally Posted by roger dowty
measured the combustion chamber on my oz 2v and they are right at 57.

I've seen them advertised as 57 and 60 and 62.
whats up with that? It's a pretty big diff compression wise.

I took them off after figuring out the valve train geometry for the final time. Wanted to put better head gaskets on and measure them as I forgot to do that.
My XA/ZF Falcon/Fairlane Ford AU shop manuals list them as 56.38cc-59.38cc. My sets have always been in the 56-58 range, except for the ones with the seats beat to hell and those were over 60cc due to the sunk valves.
 
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Old Apr 30, 2007 | 03:02 AM
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roger dowty
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From: western montana
thanks...that adds a bit of compression.
 
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