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Hi CS, I'll try to take a stab at the method I used... Sounds hard but it actually was fairly easy to do. 1) Cut a tube of cast iron with the ID the desired ID of the rings. Turn the OD 0.005 oversize. 2) Part off rings. 3) Lap or grind them to thickness. I used my surface grinder to...

Lessons Learned: 1) Piston rings can't be round enough... More to follow. 2) Despite making valve cages and drilling the valve guide and valve seat in the same lathe setup, the valves did not seal. This was probably due to drill walk when drilling through the cage and deformation of the...

Here she is running on propane... https://www.youtube.com/watch?v=1utX_u7DwiM John

I also use superglue. A little heat and the two halves break apart. A razor blade scrapes off the residue. To make my two piece bearings, I take some round stock and machine a little less than half way through to make a half round. I then cut the half round in half and superglue them...

I made new rings using a different method (a real winner!). This morning I ran a propane torch (unlit) into the carb opening and it ran! Only for a few seconds, but it ran. Ran very well too. Sounded great! Now I need to make a proper carb for it and I think she'll be a winner... John

It has had some cosmetic modifications but it very close to the print. Spark is getting to the plugs and I don't see any evidence of cross arcing to other cylinders. John

Latest update... Despite having good compression, I kept seeing oil coming out of the breather. So, I tore the whole engine down. I found a good amount of oil in 2 out of 4 cylinders. Upon examination of the piston rings, I could see that, in some spots, many showed no evidence of even...

Ahhhh! Now I see! Someday this young grasshopper will be a master too! Thanks, John

Thanks Mike, I'll give that a try... John

Hmmmmm. I think I know where you're going with that but I'm not sure. The engine had been set on my lathe cross slide, clamped down and "run-in" for about an hour. It got much looser after that and compression got better. Lots of cast iron in the oil! Could draw it with a magnet... John

Thanks Mike! Which Perry did you use? I mightgrab one to use until I get it running... John

After a year and a half making chips, I finally got my Panther Pup assembled. Problem is, she doesn't run! A found and fixed a few problems after which I was expecting it to roar to life but no dice. First, I found I wired the plugs wrong. I corrected this and now have a strong spark on each...

Looks terrific! Great work. John

Thanks Wizard, Remember the jacks are held in place by the side plates. I finger tip tightened them, then grabbed the screw heads with needle nose pliers 1/4 turn more. Then locked down the nut which loosened them somewhat. They were a snug fit between the throws but could still be pulled...

Hey Guys! I did it!!!! No significant warpage! The new material obtained locally (which was certified A311 Class B) worked like a champ! The crank is finished except for facing of the ends to length to get rid of the centers and to cut a keyway. Good day here! I use spray glue to put a...

Yes, true. Cold drawn is the same as cold formed but has a different name. The 1144 in the list are all different. Not just different names. The materials are not equivalent... -J

OK fellers, I bought a new rod of 1144 A311 Class B Yesterday from a local house (A311 Class B but not LaSalle according to the material certs). The real deal from Alro wasn't supposed to arrive til early next week and I didn't want to lose the weekend. Wouldn't you know it, the Alro...

Things are getting even more gnarled up with the 1144 deal: 1144 is available in: 1144M FatigueProof 1144 Stressproof and equivalent (ASTM A311) including TG&P 1144 Cold Formed 1144 Hot Rolled Alro stocks them all... Here's a link if you want to compare them all...

I'd like to thank George, Brian, Pete, Tom, Gail, John, et al. for responding with helpful information! I don't mean for this post to close the discussion, just to thank you all for your time... John

Thanks Brian, I'm still not 100% sure it's the McMaster material. There is a decent chance it's me or my technique. I don't feel comfortable complaining until I know for sure. I'm virtually certain it's not a grinding problem since the first crankshaft was fully turned, not ground. I...