Alexis Sanchez Posted February 1, 2023 Share Posted February 1, 2023 Hello!! I'm Alex from Puerto Rico.Currently I have my car engine at the machine shop.I have to buy new pistons and rings sets .060.We had a conversation with " egge parts in California" and they are asking me what cubic inches is my engine 222,223 0r 239 ect ect? May someone help me ? Please!!! Link to comment Share on other sites More sharing options...
pont35cpe Posted February 1, 2023 Share Posted February 1, 2023 (edited) https://chopitkustom.com/general/how-to-calculate-cubic-inches-of-an-engine or Formula for Engine Displacement (Cubic Inches)? For those who don't, and wondered what it was, here it is: Bore squared (bore X bore), times Stroke, times Pi (3.14), times # of cylinders, ... Edited February 1, 2023 by pont35cpe (see edit history) Link to comment Share on other sites More sharing options...
Axial_Flow Posted February 2, 2023 Share Posted February 2, 2023 While I don't have the answer to your question, I have used Ross Racing Pistons for custom pistons. You can send them a sample piston and they can walk you through the measurements they need for a rough estimate. You will need to know your target finish bore size, very important for finding piston rings. 1 Link to comment Share on other sites More sharing options...
Alexis Sanchez Posted February 2, 2023 Author Share Posted February 2, 2023 Thanks a lot.I wiil do so.My target finish bore size is .060 Link to comment Share on other sites More sharing options...
Frank Tate Posted February 2, 2023 Share Posted February 2, 2023 According to wikipedia (take that with a grain of salt!), the 6 cylinder pontiac was only offered in the 222.7 cubic inch displacement (commonly referred to as a 223CID) in 1939 and 1940. The following website lists the 223 in 1939 as having a bore and stroke of 3 7/16 inches by 4 inches, so your target bore size is .060 inches over the 3 7/16 or 3.4375 +.060 = 3.4975 inches. http://www.carnut.com/specs/gen/pont30.html Hope that helps! Frank 2 Link to comment Share on other sites More sharing options...
straight8pontiac Posted February 2, 2023 Share Posted February 2, 2023 Alex...Using the "Standard Catalog of Pontiac" by John Gunnell, the 1940 6 cylinder was 222.7 cu.in. Its bore was listed as 3 7/16". Good luck in your rebuild... Dave 2 Link to comment Share on other sites More sharing options...
Alexis Sanchez Posted February 2, 2023 Author Share Posted February 2, 2023 Thank you all!!!! Link to comment Share on other sites More sharing options...
Bloo Posted February 3, 2023 Share Posted February 3, 2023 Now is anyone able to tell from the casting number if it is really still the 1940 block? I'm not sure, but the engine stamping number might be a better way to tell. It is on the left side of the block, up high, at the front, right next to the head. Maybe the Standard Catalog would have a list of engine numbers? I agree with everyone else here that it is 222.7, if it is the original block. Link to comment Share on other sites More sharing options...
straight8pontiac Posted February 4, 2023 Share Posted February 4, 2023 Everyone...Using the Standard Catalog by Gunnell, the Series 25 six engine numbers are starting with 6-595801 and ending 6-761162. The Series 26 six engine has the same engine numbers. As Bloo mentioned the engine numbers are at the front left corner of the block. I hope this helps... Dave Link to comment Share on other sites More sharing options...
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