[Ronnieroadster]

Originally Posted by flatheadmurre

I´m not sure that many understand what low tension actually means...the only rings that has a tension spec is the oilrings...
Compression ring (first ring only) is forced against cylinderwall by compression and not by a set tension in it...
So if you go modern low tension you have to adress windage or oilcontrol will be the next issue in your new motor.
And if you go real narrow you need tight piston to ring fit...which means you need gasporting for the rings to work...
If resistance turning the engine over by hand would be reflected in horsepower gain it would be lovely...sadly that isn´t happening.

Following the practice used in today's engines especially in the area of piston and ring designs will help improve how our ancient old flatheads perform. Metric width rings already improve the reduction in drag due to the reduction in width. Gas ports are not needed to help the ring seal. As for windage and oil control the typical three piece oil control ring supplied with all pistons today easily eliminate any of those concerns. The days of using old wide and heavy rings has long past. From my experience using the modern style ring packs during my many long distance journeys with the flathead block I have found it to be a perfect combination. Adding to that the hundreds of flathead engines i have built using the modern type ring packs have all worked out really well.
Ronnieroadster