Which rings do I have?

I have a set of rings that came with a truck load of 55 DeSoto parts I got when I got my Fireflite convertible. They are for a 6 cylinder, full set. The package says they are 3 1/2 inch by 1/8th inch and STD size. I need to k now what they fit. The only engine I have found that is a 6 cyl MOPAR is a 289 cubic inch 1926-27 Chrysler E. Is that what I have? This is a Perfect Circle 2 in 1 Piston Ring Set, complete, in the box. At the end of the box it says "412 STD". Any help would be appreciated. Steve

Steve if you look in the "speedsters" forum look for super-sized speedster it has a 413 Chrysler industrial 6 cylinder engine. I think the 412 on your box is indicating the Cubic inches. The Chrysler straight 8's are 323.5 CI and sometimes are referred to as either 323CI or 324CI

I have a set of rings that came with a truck load of 55 DeSoto parts I got when I got my Fireflite convertible. They are for a 6 cylinder, full set. The package says they are 3 1/2 inch by 1/8th inch and STD size. I need to k now what they fit. The only engine I have found that is a 6 cyl MOPAR is a 289 cubic inch 1926-27 Chrysler E. Is that what I have? This is a Perfect Circle 2 in 1 Piston Ring Set, complete, in the box. At the end of the box it says "412 STD". Any help would be appreciated. Steve

Thanks for your info. I looked up the 413 engine. It has a bore of 4 1/16inch. These rings are 3 1/2 inch Can't be for that engine. I wonder if they are for one of the smaller industrial engines.

Yea I did the math and a 6 cylinder engine with a bore of 3.5 inches would need a stroke over 7 1/8 inches to have a 412 CI displacement. I have a set of .040" over 3 7/16" pistons for a 265 CI Chrysler which is the largest production 6 that I now of.

Steve, some time back I was looking at a website that listed ring sizes and most popular auto engines they fit. I don't recall if it was part of Sealed Power or another ring maunfacturer website. You might do a little Googling and see what you find. I'm sure that 3 1/2 by 1/8 is a very common size used by lots of engines.