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#1 |
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I have always been told that an X was put into the core box when it was worn out.
Now, that could make sense or maybe there were some Racer types loose in the foundry who had found some really good core boxes and made sure that special projects used these pieces.
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Billy Nees 1188 STK, SS I'm not spending 100K to win 2K |
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#2 |
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This could be the smoking gun as to the great 283 intake travesty !! But the 'damage is already done ' !!! OMG the 283s are taking over the eliminator !!!
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#3 |
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Some additional links that may not be as useful, but refer to casting marks such as "CFD" (Central Foundry Division) and engine markings "F" (Flint) and "T" Tonawanda being used to identify origin.
https://www.mortec.com/location.htm https://www.mortec.com/locatpg2.htm http://hotrod.gregwapling.com/chevrolet/mckinnon.html https://news.pickuptrucks.com/2011/0...g-center-.html |
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#4 | |
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![]() Quote:
Never found any X castings for my LT1. LOL
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Ed Wright 4156 SS/JA |
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#5 |
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Billy, My buddies at Brodix tell me that as their Core boxes wear the port is cast smaller.
I was questioning them one day about their advertisement for port size and flow. I told them that what I buy never matches the advertised size and flow. Dave Roder told me it was because all the ads are done off the first production run and as they pour/cast more heads the ports get smaller. I'm no foundry expert so I just shut up and accepted the explanation. Probably what they wanted me to do, LoL. I would bet that the GM X means the mold/core box was modified. If the X was for worn out why would they be using them? No doubt the X castings I've seen always seem to have more intake volume.
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#6 | |
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#7 |
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Dwight, according to the source below and other sources the 461 and 461X casting numbers date back to 1961 (first 327 engines).
http://www.corvetteactioncenter.com/...gines-286.html http://www.chevytech.com/3c3782461.html |
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#8 |
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Interesting,
No 22542525 heads on the list. Olds Nascar head/
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Adger Smith (Former SS) |
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