And down the Rabbit Hole we go......
I built my motor after 3 years of research and reading and talking to people, and reading threads like this
So many variables, for this motor and thousands of variations. You can have the original CYLS honed, or do what many do and get them from EMW who I believe source them from a MFG in Nevada. The Pistons are Keith Black, and the Ring Set Hastings is for a Ford 2.3 liter 4cyl, so nothing is universal, and variables bring variables.
Some (Len Hoffman/Jake Raby) say leave the rings alone and after trying this discovered that to increase the ring gap increases crankcase pressure and oil consumption. Note that BOTH are referring to the Hastings set, not just any set, and I imagine that there are ring sets that could have little or no gap. THESE sets would bring disaster and bind/break in the cyl bore.
In this case it makes sense that the Piston manufacturer, and largest distributor of the KB pistons says to increase ring gap, and with varying instructions. Then again, EMW sells the Hastings set and says to increase the gap on the top ring so who is right? How little is too little? how large is too large? I think it would be a great poll to ask for those who run the KB pistons, what their ring gaps were.
I decided to take a middle road. I had measurements from .018 to .020, (checked in ALL CYLS) and wanted all to be equal so I increased all ring gaps to .020. What was notable was the the gaps were all uneven and angled on the top ring. I filed them square and even. The second ring (with dot) was .015 and square. 3500 miles so far, and the motor runs strong, no issues. Great compression and no oil burning so far.
My lesson learned was to NOT be anal about it. In the end its a gray topic. GO for balance, and ENJOY.
on another note, Stugray, If I remember correctly, you had an interesting public discussion with a legend on this topic