i run speed pro rings with alot of ring gap on my 32 skater 15psi boost @7500 rpm will have blowby in puke tank let it happen thats what puke tanks are for at least the rings wont expand and butt together it makes big power 1230 hp 1140 lb torque its old school roots blower set up but if it aint broke dont fix it

You still have to run a gap with total seals its just a two piece ring.The lower the block pressure the less power it takes to turn the rotating assembly.Thats why you make more power with a dry sump set up allmost negitive pressure.Robs problem seems to be high leakage on one engine.
Also if your running to much piston to cylinder wall clearance your rings wont last as long.

Yeah........REALLY!!!

Rob, what do you call loose as far as piston to cylinder clearance? Why do you have to replace the blocks? What is the bore now? If they are Gen VI blocks, they can go to 4.600. All and all, even at 15% on an sc engine with over 100 hours, that's not bad.

i agree that dry sump makes alot more power cause of less windage i run procam oil pans on my boats they are made my baker in michigan best oil pan for wet sump setup

Can you post a pic of that oilpan ?

I got a piar of 598's that will leak less than 5% right now. 14 holes will go less than 3%. They have not been fired in a month. So will Joe Murray's 598's.

I figured 15% was soso,Also meaning nothing is hurt. Gen 6 2001,The pistons call for 6.5, most are around 8 one is 10 and 11.theres alittle scuffing on the pistons,its been like that for the last 2 ring jobs, one is 30 and one is 60, I was thinking taking the 60 over to 70, but they say they don't make rings for them. I really didn't want to go past 70 over.I'm scared of it being thin.I see they make a ring for a 4.560.I wonder if thats a off the shelf piston?

Rob

]I got a piar of 598's that will leak less than 5% right now:
thats dayum G@@d #s BIG Daddy ,must be them big hp motors cause down here fresh off the dyno there seeing 8 to 10 %

maybe we should use these Speed Pro plasma for a game of ring toss

i will post a pic soon

You can Also try C&A rings.

I have 2 builds on Childs and Albert rings they have a zero gap setup very similar to speed pro.

Looks like they have your size as well.

Yeah 15% is the early end of getting tired.
Not bad, but not new. Another season it will probably be time.

"Uncle Dave"

Laveycraft 2750 Ilmor 710
Laveycraft 20.8 Sebring 406 SB