George Rohrbach

Piston Identification Help ?

Recommended Posts

  I have been doing inventory on some of my parts. Last week was pistons, mostly Commander Big Six. Of course the easy ones were the Studebaker brand. However I do have some after market also. The way I identified  those was by measurement - fairly easy. 3.250 and up are 1934 to 1937. 3.3125 and up are 1948-1960, Iron ones are 1942.

  However, I have a set of 4 Aluminum ones, that mic out to 3.140. IMG_4041.thumb.jpeg.45ec4881d244db097f5f6b2909229042.jpeg

Which does not match. I thought the might be Champ, but they are 3 inch, and a .140  over does not seem logical. From what I can find, Rockne STD pistons start out at 3.125. If it was .015 over, that could be a match.

  Or come up with another idea? I have spent hours checking on the net, and could not find anything.

  The pistons are marked Silv-0-lite S-115. Just in case anyone has a old Silv-0-Lite catalog.

Thanks

Share this post


Link to post
Share on other sites

Any chance you can find the piston pin diameter and the compression height on a Rockne piston?

Share this post


Link to post
Share on other sites
On 2/25/2018 at 7:54 PM, Gary_Ash said:

George:

Try contacting the current manufacturer of Silv-o-lite pistons at http://www.uempistons.com.


 

George

Did you get a reply from them?

Gary , thanks for the link to this fantastic website.

Everyone should see this.

I wonder how helpful they are with early engine parts.

Share this post


Link to post
Share on other sites

The pistons may be Semi pistons which means they need to be cut down to size. Was a common practice back then, you need a special machine for sizing them is my understanding.

 

Marv.   

Share this post


Link to post
Share on other sites

George indicates his computer prevents him from a current response but the pistons turn out to be 1929 Commander 8 Model FD, with 250.4 cid.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now