[Fot] Head Thickness

[SCOTT JANZEN]

I will measure two of mine when I get home . There's no single answer as every casting is different. I've got one at 12:1 compression with no thin spots and another at 11.5:1 where you can clearly see a thin spot where the metal is deforming near a cooling passage. The machinist did several light passes, looking for this.
There was an email just over a week ago with photos of a head marked with the thin spots. Look for that for guidance and find a good machinist that will take a little off at a time, looking for trouble.

Sent from my mobile device 

> On Apr 6, 2015, at 7:27 AM, damys--- via Fot <fot at autox.team.net> wrote:
> 
> Wondering if anyone can tell me the max I can shave off my GT6 head. Actually looking for the minimum height of the head after milling.  Right now the head stands at 3.283".  With a 2.95 bore, 2.99 stroke, .033 squished head gasket and 34.5 cc valve pockets.  The compression, as I figure it, is 9.76:1.  I'm looking for 12:1.
> The head is stamped V3119 and 308361.   It's off of a 1970 GT6+ that we're building strictly for racing.  Looks like we can still remove at least .040.
> Any help will be greatly appreciated.
> 
> Dave
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