Dave_B Posted October 29, 2012 Share Posted October 29, 2012 Does anyone know the compression height of '28 Master pistons? I bought some 40 something Olds pistons at Hershey. They are the same bore, 3.5", with the offset wrist pin and I think they might just work in a '28 Master.Dave Link to comment Share on other sites More sharing options...
Dave_B Posted October 29, 2012 Author Share Posted October 29, 2012 Here are a couple of pictures of the Olds pistons. They are 3 1/2" bore and 4" high, same as a '28 master. The compression height on these is 2 1/4". If that dimension is close to the '28 master piston I thought it would be an improvement over the cast iron ones. which leads to the original question, what is the compression of '28 master pistons?Dave Link to comment Share on other sites More sharing options...
pepcak Posted October 30, 2012 Share Posted October 30, 2012 Dave,you may try to estimate from these pictures. Or ask the guy... Do you happen to know what Olds to look for, seems I will be in need of pistons in few months....2 1927 Buick Master 6 Pistons 3 1 2" in Diameter | eBay Link to comment Share on other sites More sharing options...
Dave_B Posted October 30, 2012 Author Share Posted October 30, 2012 Pepcak,It's hard to tell from the picture. I sent him a question. I'll let you know as soon as I find something out. Dave Link to comment Share on other sites More sharing options...
Dave_B Posted October 30, 2012 Author Share Posted October 30, 2012 Pepcak,I found out the compression height of the 28 master pistons is 2 3/16, only 1/16 different from the Olds. It would raise the compression ratio a little if you used the Olds pistons in a Buick engine, but that would be a good thing. These pistons are for the Oldsmobile '41 to '48 238 c.i. six cylinder engine.If you are interested in them send me a pm.Dave Link to comment Share on other sites More sharing options...
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