minimum head thickness

[AlfaNeely@xxxxxxx]

In a message dated 4/15/2003 6:23:16 PM Central Daylight Time, 
owner-alfa-digest@domain.elided writes:

> Date: Wed, 16 Apr 2003 11:14:05 +1200
> From: White Anthony <anthony.white@domain.elided>
> Subject: minimum head thickness
> 
> Hi all,
> 
> Is anyone able to remind me of the minimum head thickness for a two litre?  
> 
> I understand stock height is 112mm.  I've seen a couple of figures before; 
> one a minimum for a race engine, the other a minimum for a street engine.  
> The race engine dimension was smaller, presumably because they aren't 
> expected to last as long?  
> 
> Regards,
> Anthony.  
> 

       The stock 1600, 1750, 2000 and some of the 1300 Alfa heads are 4.41 
inches or 112 mm thick.  That is measured from the head gasket surface to the 
valve cover surface.  The "minimum" thickness per various shop manuals is 
0.020 inches less or 111.5 mm.  The racing minimum per the CRH or Competition 
Reference Handbook is 110 mm or 4.33 inches, which is about a 0.078 inch cut.
       Racing engines are run at the ragged edge.  They tend to blow up more 
often that stock engines.  For a street Alfa that I wanted to be somewhat 
reliable, I would limit the cut to about 0.050 inches.

Ciao,
Russ Neely
Oklahoma City
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