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Aftermarket Iron Pontiac head
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01-30-2023, 12:57 PM
Nobuddy
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Join Date: Dec 2017
Posts: 92
The shrink factor for sand casting iron is about half that of aluminum so just pouring iron into molds made for aluminum results in an oversized part. My estimate is a bit less than 1/8" oversize over the length of the head.
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