Bought some Summit piston rings for an engine I'm building and checked the gaps. Top ring has .020" and the second ring has .016" out of the box.
With a 4" bore I'd have thought it would be the other way around: .016" on the top (.004" per inch of bore) and .020" for the second ring (1.25 x the top ring gap).
I definitely haven't got the rings mixed up as the upper ring has a moly face and the second ring is plane iron. The details on the Summit website, don't help much beyond this, but they do say "File fit: No", which I guess means you don't have to file them to get a fit.
Anyone know what's going on here?