My 273 1/4 Mile Time Slip With Video

gas ported rings are not allowed, total seal has gas ported spacers, which are legal also, can install metric rings, they are worth power. total seal makes spacers to install thinner rings in top two grooves . well worth the cost. use a napier second ring, can lower oil ring tension lot more then . a 1.2 mm top ring and a 1.5 second ring works very good. oil ring should be bout 6# pull.