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Can you address the questions posed given your stated expertise? |
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This is from the camaro brochure.
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So, you called a machinist who has determined that the brinell hardness reading is greater on later blocks? 😂
Do you know how silly that sounds? All you want to do is argue. PM me if you really have questions. Quantitative hardness testing on a representative sample of blocks cast on specific dates would be the only way to draw conclusions. I lived this Phil - please don’t just be contrary. PM me if you have questions. |
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Now with that aside the Marc Dant post is instructive as to the discussion for those so inclined. |
The brochure must refer to casting design enhancements. Class 30 cast iron for blocks was metallurgically unchanged.
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One to a tougher block. The other to 4 bolt main caps. |
As an aside I have a detailed Early and later 010 design comparison changes for blocks in images... I can post here if there is interest.
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I’m just telling you facts Phil. Your “apparent” conclusions are on you :-)
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Bergy,, I have a question. I’ve always heard that 2 freeze plug, 2 bolt main 400 small blocks were better/stronger/heavier castings than the 3 freeze plug 2 and 4 bolt main versions. So I built my 406 with the two freeze plug casting. Can you shed any light on this? I’d appreciate hearing your feedback.
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When I don't know I'll tell you Andy - I don't know the answer to your question. As I recall, there was a 400 block that ended in 817 during the 70s. We all felt that it was the highest quality block that we produced. It was the only block that was cast using a single core to form all of the bores and bulkheads. So, it was a lot more dimensionally accurate then the multiple cylinder bore cored blocks.
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