performance implications of bad rings?

[isnms]

What are the performance implications of bad rings?
does it sap horsepower, decrease gas mileage, cause misfire,....

I know one thing for sure, you use a quart of oil every four days :aigo:
The machinist did a leakdown and determined the rings had not sealed properly. He is replacing them now under warranty.

 

[GrimJack]

It'll decrease your power, increase your spool time, and make your oil black with soot.

 

[MK3Brent]

After reading about how leak-down tests are performed: Will a leak down test rate air leaking through valves? More importantly, valve stem seals?

 

[GrimJack]

???

Valve stem seals are made to keep out oil, not air. The combustion is held in the cylinder by the valve itself, not the seal.

Short answer - no, leakdown test will not diagnose leaky valve stem seals.

 

[isnms]

It'll decrease your power, increase your spool time, and make your oil black with soot.

Yes Very black oil.

Whoo-Hoo I can look forward to more power and quicker spool
Thanks Grim.