Call Kevin Studaker at Total Seal. Let him know your combo.
Talked to Kevin at TS: he said “the gapless top-ring setup should be considered a race-only deal, and is really not appropriate for a Street / Strip type of build.“. He explained that the gapless top-ring will create so much more pan vacuum that it will pull oil from the top end and could create top-end oiling issues at slow engine speeds. Further explained that gapless 2nd ring is safer for a build that will see low RPM duty.
This is hard to quantify. Even a fully dedicated, 100% race only car is going to see considerably more time at idle and rolling through the pits than actual race time. While my car is 98% race these days, and sees very little street time (I don’t even own street tires for it) I find myself leery of the oil pull issue. On the flip-side, it’ll have roller lifters and roller rockers…. How much oil could it need?
hmmmm….. I suppose I’ll talk to my machinist again.
edit: Talked to my machinist. He’s used them and says he’s never seen issues arise, but also cannot identify any measurable performance gains. Says they are popular with the Stock Eliminator guys who are willing to pay for every last fraction of HP. Probably will just save the $$$ for somewhere else.
sorry to waste your time.…..