a sell Posted March 25, 2017 Share Posted March 25, 2017 (edited) I am looking to find some replacement connecting rods for my old engine (not Ford). The originals are 2 piece connecting rods with a 1/16" spacer on each side between the cap and the rod. I am researching replacements. The original rods are 1-1/2" journal diameter X 1-7/8", wrist pin is 27/32", center to center length is 7-3/8" but could be up to 5/16" or 3/8" longer. Replaceable insert bearings might also be a plus. Can someone tell me the measurements of the model A connecting rods? Edited March 25, 2017 by a sell Wrong wrist pin number (see edit history) Link to comment Share on other sites More sharing options...
herm111 Posted September 18, 2017 Share Posted September 18, 2017 On 3/25/2017 at 1:05 PM, a sell said: I am looking to find some replacement connecting rods for my old engine (not Ford). The originals are 2 piece connecting rods with a 1/16" spacer on each side between the cap and the rod. I am researching replacements. The original rods are 1-1/2" journal diameter X 1-7/8", wrist pin is 27/32", center to center length is 7-3/8" but could be up to 5/16" or 3/8" longer. Replaceable insert bearings might also be a plus. Can someone tell me the measurements of the model A connecting rods? Mr. A-Sell, Model A rods will not replace them at all. 1.500 bore, close to 1.500wide, and C to c is 7.500 I think you have 1927-28 4 cylinder Chevy Rods. Look for Casting No. on the rod of 346740, or 344649, and they should have a dipper on the cap. They have a Std. Bore of 1.500, 1.875 Wide, and C to C is 7.375 Herm, Link to comment Share on other sites More sharing options...
a sell Posted October 22, 2017 Author Share Posted October 22, 2017 Thank you Herm, yes I have Chevrolet 4 cylinder connecting rods. That is what I am trying to get away from. Someone posted that they thought Durant, or Star 4 cylinder rods were 1/2" longer and could be easily adapted to the Chevrolet 4 with the same wrist pin diameter. I was looking to confirm this info but..... Link to comment Share on other sites More sharing options...
040under Posted April 12, 2021 Share Posted April 12, 2021 (edited) You can use Model A rods, I'm using 34- 41 Plymouth rods for higher compression. You must build up the crank for Ply rods, I do the clam shell method to build the crank up. You can also use Model A Valves and seats ( the larger than stock ) A slightly more modern cam configuration helps, as stock is good for about 2500 RPM. Edited April 12, 2021 by 040under more info (see edit history) Link to comment Share on other sites More sharing options...
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