Conventional rings like Speed Pro or J-E etc.have been shown to make more power if the gap is set correctly and a light tension
oil ring is used. Rings sets like Total Seal, that make the second ring into a compression ring instead of an
oil scraper, require higher tension
oil rings which create drag and power loss when compared to a light tension ring.
Dyno tests of convensional rings show the same amount of blow-by at full throttle as the gapless style even though when the engine is not running, the leak down is better with the gapless rings.