Quote:
Originally Posted by GUMP
This looks good at first glance, but would be pretty much impossible in practice.
Even if the sanctioning body did aquire virgin examples of every single head in the guide they would run into issues. There are enough variations from casting to casting that a "tolerance" would have to be allowed. If not, lots of untouched heads would fail when compared to the sample. With that allowance, the scan is useless and we are in a similar (but worse) situation than what we have now.
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Gump is correct. There will need to be a tolerance percentage allowance due to shrinkage and core shift. Shrinkage can be as high as 6% in Aluminum castings.