I putting a 351W Ford pump gas street motor together for my 1940 ford Tudor street rod, I ordered a set of pistons from Race Tec, Auto Tec along with a set of 1/16,1/16,3/16 standard tension oil rings. It came with a set of Hasting rings, I'm use to using Total Seal or some other brands like Seal Power or Speed Pro file to fit.
These Hasting have a lot of more ring overlap in the bores before filing and the oil ring rails seem to be a lot softer than the other brands I've used in the past
On my set, 4.030 1/16,1/16, 3/16 standard tension oil rings I could not fit the rings into the bores with out making the ends overlap each other, I see right at .130 + over lap on the 2nd rings so far, I had to file the oil ring rails a bunch to get their recommended .015+ end gap and ended up with .050 + on a lot of them
I'm going to start filing the top rings later this afternoon after finishing fitting the 2nd rings on the passenger side of the motor today
My concerns are for all of you that end up using these rings to be very careful when filing them on a electric ring filer like the Pro Form filer I use, it ground through the oil ring rails ends in a big hurry
I like to see more gap then the minimum by .002 to ,004 depending on the intended use of the motor, I do widen the 2nd ring by .003 to .006 more than the top ring gap also
IHTHs