Between using Chrome and Molly Piston rings in a 350 small block 4-bolt main bored out.040 with Fuelly Cast Iron Heads, which would make the better ring and why? Please Note that motor is in a street machine that will see very little if any time at the track!
Fords....Ha! Only little girls dream of Ponies. REAL men wear Bowties
Chrome rings are alot of money and are used mostly in industrial engines that are in dirty conditions and there will wear a cylinders faster as chrome rings are so hard there seems to be more wear with them and require a corse finish.
Moly rings are less money and the moly finish on the rings help lubricate the cylinders and you can use a fine finish sush as a 280 grit.
If not mistaken, chrome rings require "round" cylinders b/c if the cylinders aren't round, they take forever to seat b/c the chrome is so hard that it takes a long time to wear the chrome coating down so the rings fit and seal properly.
I don't think it is a good idea to use chrome rings for a "dingle-berry" hone, "shade-tree" overhaul b/c the cylinders are usually worn unevenly so aren't really round to allow chrome rings to seat quickly unless you bore her oversize and change pistons.. Then the cylinders will be round again...