Ken/Alabama Posted October 11, 2011 Share Posted October 11, 2011 Anyone know if the 36-37 V12 blocks can be bored to the later 2 7/8 size ? Link to comment Share on other sites More sharing options...
peecher Posted October 12, 2011 Share Posted October 12, 2011 Why not spot check a few places for wall thickness? You may find like I did with the '42 block that there was plenty of thickness there for an 1/8" overbore. Not sure if all these V12's blocks were cast with simular cylinder wall thicknesses? The water pump cavities are a little shallow for the '40 to ''48 water pumps so you may end up having to use the early style water pumps, maybe with a Skip's upgrade. Here are a couple of pics of the overbored '42 block with the standard Ford piston. Link to comment Share on other sites More sharing options...
Ken/Alabama Posted October 12, 2011 Author Share Posted October 12, 2011 Thanks Peecher for the reply. Are those pistons Ford V-8 pistons or are they V-12 pistons made to the 3 1/16 Ford size. If they are V-8 Ford I was just wondering about the wrist pin size and what has to be done to use them. I have a 42 block and could go this route. Link to comment Share on other sites More sharing options...
peecher Posted October 12, 2011 Share Posted October 12, 2011 Yes, those are 3-1/16" Ford flathead pistons. Wrist pin center to top dimension is slightly less, about .040". The compression loss is probably more than made up by the extra bore but you can always take a bit off the decks. The wrist pins are the same size as the V12's and fit the connecting rods with no mods. Link to comment Share on other sites More sharing options...
Ken/Alabama Posted October 13, 2011 Author Share Posted October 13, 2011 Thanks Peecher for the information, now you got me thinking about building a big bore V12. Standard bore V8 pistons are cheap and will help offset the cost of boring VS the high price of the V12 pistons and still have to cover the price of boring. BTW , just how many cubic inches does that give you by using the ford pistons ? Link to comment Share on other sites More sharing options...
peecher Posted October 13, 2011 Share Posted October 13, 2011 332 cubic inches. Link to comment Share on other sites More sharing options...
Guest frenchy dehoux Posted October 13, 2011 Share Posted October 13, 2011 The 1936 and 1937 block did not have the front engine mount part of the block they had the mount separate that you had to bolt on. Thanks Frenchy Link to comment Share on other sites More sharing options...
Ken/Alabama Posted October 15, 2011 Author Share Posted October 15, 2011 The 1936 and 1937 block did not have the front engine mount part of the block they had the mount separate that you had to bolt on.ThanksFrenchyMaybe the block I have is not a 36-37. Its not set up for hydraulic lifters so I thought had to be 36 or 37 . Didnt the hydraulic lifters come with the 38s? This block I have has the front mount cast on to it. I will take some pics and post them. Link to comment Share on other sites More sharing options...
CBoz Posted October 15, 2011 Share Posted October 15, 2011 Actually, '37 blocks did have the front engine mounts as part of the block, so if it's solid lifters and has the cast-in engine mounts, it's a '37. As you noted, the '38 was the first year of the hydraulic lifters. Link to comment Share on other sites More sharing options...
Guest frenchy dehoux Posted October 20, 2011 Share Posted October 20, 2011 That is correct the 37 did not have the two tubes inside the valve galleys area which were there to feed oil to the hydraulic lifters introduced in 1938 for the hydraulic lifters. Frenchy Link to comment Share on other sites More sharing options...
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