Ken/Alabama Posted March 5, 2013 Share Posted March 5, 2013 Anyone know how far the later V12 blocks can be bored ? Link to comment Share on other sites More sharing options...
Guest zazothex Posted March 6, 2013 Share Posted March 6, 2013 Have always wondered this myself. I know Peecher can add something to this, as he's got a pre-war (42) block bored out. The OCee Rich book states that the v12 can be bumped up to the L8 standard 3 1/16, but qualifies it by saying 1 in every 8 or so would probably hit water and would need to be sleeved. I considered trying it when I did my rebuild, but everything about the 12 is so expensive, I would rather stick with it stock. Link to comment Share on other sites More sharing options...
1941 Posted March 6, 2013 Share Posted March 6, 2013 Dee Peecher can indeed weigh in on this. I myself am just now finishing assemblyon a 1942 block for my Continental. It has been bored out .60 over , with no problems.By the way, Dee has helped me immensly with this rebuild and assembly. Hoping to tour again this summer, after 4+ years of wait.Mike Lynch1941 Continental Cabriolet Link to comment Share on other sites More sharing options...
peecher Posted March 6, 2013 Share Posted March 6, 2013 (edited) I've never checked a postwar block closely for cylinder wall thickness but if it's simular to the approximate 5/16" thickness of the '42 blocks I would think that an overbore of 1/8" would be safe on a 2-7/8" postwar block. .060" oversize 2-15/16" pistons could then be used. Availabilty of these pistons might be a problem altho Mike Lynch evidently got a set. The 3-1/16" overbore on the '42 block is just about the limit in my opinion. Standard Head gaskets will just barely make the necessary seal on the 3-1/16" bore but should be just fine on the 3" bore. Edited March 6, 2013 by peecher (see edit history) Link to comment Share on other sites More sharing options...
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