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Showing results for tags 'head'.
Found 4 results
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I had my head milled, more than normal (.060) because I wanted to do some chamber work. I marked the gasket edge on the head and ground the area near the exhaust valves back closer to the gasket edge to unshroud the valves and did a little smoothing. Checked the resulting size and arrived at 70cc. I measured the head gasket that will be used and estimated (guessed) its' compressed thickness at .040 so it should add 8cc or so. Compression ratio = (cylinder displacement+chamber volume+head gasket volume) / (Chamber volume+head gasket volume) My numbers, all in cc's , (628+70+8) / (70+8 That puts me at 9.05:1. Close to maximum I think for a flathead. Probably be a premium fuel burner. Now the questions. How do those numbers compare to any measurements you folks have taken? Does the calculation above make sense to the collective wisdom here? There is a more smoothing that could be done to gain a few cc's if needed. edit to add: This is a 56 Plymouth 230 head. These were advertised originally at 8 or 8.1:1. With the .060 I removed they must have been way under the spec'ed ratio from the factory as the amount removed in the chamber work was not all that much.
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A few months ago, a got a '50 Desoto Custom, and I've been a lurker here since, looking up info and finding answers to common questions. I've got one I haven't found an answer for. My head has a "feature" I've not seen before, a hole In the #6 combustion chamber which goes into the water jacket. It lines up with a pipe plug, which I've removed. You can see daylight through the hole. Seems to me, water would pour into the cylinder. Is there supposed to be something there?
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Is there a way to tell when a head was manufactured? For instance, the '55 engine I have in my P15 has the following numbers & notations on the head: 12.10.54; 1616823-4; and a 'D' & 'N', with an arrow below it pointing to the 'D'. I assume the first is the date code, which would make sense for a '55 engine. This head also has the smaller hole for the temp gauge, because the '55 models had an electric sender unit. I have another head which I believe to be out of my 49 1st series (P15). It has the following notations on it. 12-1; and 1120803-8. The reason for asking is because my brother has an engine from a '51, which also used the capillary style temp sending unit. We had some things stolen from our cars in our parent's back yard, and we're trying to establish if the head I have is from the 49, or the 51. The one I have I had moved into the shop before already, possibly years ago, but I don't remember when. (My extra bell housing has also disappeared. - I assume stolen when the other stuff went missing.) Both of these engines were torn down back in the early '80's. Thanks.
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I will be putting the head back on my 1949 Chrysler Windsor 6 Cylinder. I bought new head bolts and gasket. I read I should use sealant on the head bolts. Pipe joint compound was recommended. Is Loctite ok for this job? Thanks for any response.
