[/quote]

4.600 bore engine I would have top ring gap over .030 for N/A and a little more if forced induction or nitrous. A little extra gap doesn't hurt anything, not enough could get ugly fast. Dan [/quote]

No, .016", just tight enough so the feeler gauge by itself is held in the gap.

Diamond doesn't build engines, or rings.

And yes, it makes a difference.