New piston/ring design
With the new pistons not having the ring pin and the oil ring now being a 3 piece vs a 1 piece design, oil control won't really be an issue.
So, we come to the lower 4th ring.
I've read lots of discussions on it's advantages from oil control to piston slap (piston rocking in the bore), but is the 4th ring really needed?
I had this discussion with my machinist, who specializes in flathead fords, runs Bonneville with an open coupe flathead, and his input was they actually dyno'd one with and without the 4th ring and gained 8hp without it.
That may not sound like much but when a stock engine is about 125-130hp, 8hp is a good gain.
So, has anyone else with Hudson experience, experimented with these.
I would guess Randy Maas and Uncommon Engineering probably build the most Hudson 6s.
I'm just trying to lay out my build plan for the new 308.
Machine work is almost done.
Decked, New exhaust seats, guides, a couple thread repairs, 3 angle seats....Lot's more port and bowl work once I get it.