Hya
Head is of - I am CC ing it and the Block tomorrow - Bigger valves, portwork , skimming, hardened exhaust valve seat to be done this coming week
BTW what is up with the 2 water passages being blocked of by the head gasket?
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| Cylinder head time https://slantsix.org/forum/viewtopic.php?t=34277 |
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| Author: | 68barracuda [ Fri Mar 13, 2009 5:50 pm ] |
| Post subject: | Cylinder head time |
Hya Head is of - I am CC ing it and the Block tomorrow - Bigger valves, portwork , skimming, hardened exhaust valve seat to be done this coming week BTW what is up with the 2 water passages being blocked of by the head gasket?
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| Author: | Joshie225 [ Fri Mar 13, 2009 5:55 pm ] |
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The water has to flow through the block before it comes up through the large transfer passages at the back of the block. Some also flows through the holes below the exhaust valves. If the big hole at the front of the block were let open most of the coolant would bypass the block and head. |
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| Author: | 68barracuda [ Fri Mar 13, 2009 11:27 pm ] |
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Thought as much - Is there any info that can be gained from the casting numbers on the head? I notice that the head does not have the casting dot... which means it has the revised combustion chamber if I understand Doug's article correctly BTW the valve springs are green in colour ...ideas on this? |
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| Author: | Joshie225 [ Fri Mar 13, 2009 11:49 pm ] |
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Do you know where your engine was cast? I'm wondering if your casting numbers would correspond to US or Mexico casting numbers or not. Good pictures are probably best for identifying pertinent features. The valve springs were probably color coded according to use, but unless we find someone that worked the assembly line back then the specific color and application may never be known. |
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| Author: | 68barracuda [ Sat Mar 14, 2009 9:13 am ] |
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Will take them tomorrow - as we had it the blocks where cast over here - local content by weight issue but stuff was imported as well BTW my chamber volume is 59cc the volume above piston at tdc is 29cc I need the gasket diameter and compressed thickness to finish my current calculation please
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| Author: | stonethk [ Sat Mar 14, 2009 9:17 am ] |
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The 225 I pulled out of a 71 d100 has the 5 plugs & extra ribbing- BF casting. The valve springs on it are green as well, dunno if this helps or not. |
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| Author: | 68barracuda [ Sat Mar 14, 2009 9:41 am ] |
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Got the info out of one of joshes other posts.. http://kb-silvolite.com/calc.php?action=comp used this tool 7.52  so to get to 9.5 i need .14 of the head - is this viable? |
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