File fit rings
#21
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iTrader: (3)
I'd like to see a test with a blowby meter installed, with a properly setup gapped ring, vs a gapless..and see what is really going on. Conventional gapped rings aren't designed to seal sitting on engine stand with the engine off. I think its pretty much been proven many times by some pretty big time engine builders/race teams, that the low leakdown numbers when comparing gapless rings, have no real world relation to what is really going on once the engine is off the stand.
#23
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iTrader: (2)
I'd like to see a test with a blowby meter installed, with a properly setup gapped ring, vs a gapless..and see re what is really going on. Conventional gapped rings aren't designed to seal sitting on engine stand with the engine off. I think its pretty much been proven many times by some pretty big time engine builders/race teams, that the low leakdown numbers when comparing gapless rings, have no real world relation to what is really going on once the engine is off the stand.
#24
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when checking leak down on a fresh rebuild w/ file fit rings,I see 2% or less.Then on the other token,My engine ran like a mofo,some of the fastest speeds out of them.when leaked down,6 out of 8 cylinders had 40-50% leak down.go figure.
#25
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iTrader: (3)
I'd like to see a test with a blowby meter installed, with a properly setup gapped ring, vs a gapless..and see what is really going on. Conventional gapped rings aren't designed to seal sitting on engine stand with the engine off. I think its pretty much been proven many times by some pretty big time engine builders/race teams, that the low leakdown numbers when comparing gapless rings, have no real world relation to what is really going on once the engine is off the stand.
#26
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It be cool to be able to hook up a blow by meter, and monitor those numbers, as when its time to do a freshen up. I read a post on one of the sites like yellowbullet or speedtalk, where they had a used/ran engine that had super low leakdown numbers with gapless rings, and when they strapped it to the dyno, the blowby cfm under full throttle load was off the chart.
#28
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iTrader: (1)
When people are talking gapless rings, can they state if gapless top or 2nd ring ? Thanks.
Last edited by SB; 12-01-2015 at 06:35 PM. Reason: spelling
#30
Flatness of +/- .0005 = total deviation of .001. Not face flatness, but flatness as when you lay the ring on a table. Most "performance" rings are ground flat but, for example, Total Seals AP (Advanced Profile) rings are lapped and can achieve a much flatter surface to seal on the ring land in the piston. I would venture to say a 5/64 iron ring isn't even ground, but parted on a lathe and left with a machine finish. This is why I told the OP don't worry about the gap...that ring is losing a lot of seal just in it's inherent design.
The second ring is already .004 bigger at .029.
I have heard people running a gapless second ring, if they really sealed that well, wouldnt they cause problems on the first ring?
Thanks for the technical input rather than bickering(for every one not you)..