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Discussion Starter #1
Can anyone explain the advantages of ***** rings.
I have 2 engines with them, one is KB hemi that has a ***** on the top and total seal on the second.
The other is bbc with ***** on top and conventional ring on the second.
Both are blown alky engines.
Reason I'm asking is that ***** rings are a pain to get hold of.
 

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Compression get's behind the lip on the ***** ring, pressing it to the cylinder to help seal. It dont need as much tension to get the job done that way. I had a set in my first SB2.2 headed engine and your right, they are much harder to find. (and cost much more too)
 

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Can anyone explain the advantages of ***** rings.
I have 2 engines with them, one is KB hemi that has a ***** on the top and total seal on the second.
The other is bbc with ***** on top and conventional ring on the second.
Both are blown alky engines.
Reason I'm asking is that ***** rings are a pain to get hold of.
for your application, a ***** is likely the best ring for the job.
 

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Butch
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Can anyone explain the advantages of ***** rings.
I have 2 engines with them, one is KB hemi that has a ***** on the top and total seal on the second.
The other is bbc with ***** on top and conventional ring on the second.
Both are blown alky engines.
Reason I'm asking is that ***** rings are a pain to get hold of.
I lke ***** rings in high rpm smal blocks, my pistons use .031" ***** more of a N/A type *****/Pressure Back

I would be willing to bet your .017" *****

The outer part of the ring land is .0785" and the ring is .062" with the top ring land turned down some to load the ring,,, see pic below

For small cube engines they have MINIMAL FRICTION which is why I use them and they seal up GOOD from 6000+

Here is a dimension chart from Speed-Pro
 

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Discussion Starter #7
Thanks for the replies. I guess I'll stay with the top ***** rings, despite the cost and availability. Have been waiting over 3 mths for a set.
Trmnatr, the ring grooves on my hemi are .080 and .055, the BBC is .080 and .052"

On the hemi I have, it has been fitted with Total seal 2nd ring. I've read some info lately about using a std ring in the second groove, with larger gap than the top to stop any pressure getting trapped between the rings. This makes a fair bit of sense to me. So, if thats the case, should I have a gapless second ring or conventional ring.
The Arias pistons that I got for my BBC came with a conventional second ring.
 

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Thanks for the replies. I guess I'll stay with the top ***** rings, despite the cost and availability. Have been waiting over 3 mths for a set.
Trmnatr, the ring grooves on my hemi are .080 and .055, the BBC is .080 and .052"

On the hemi I have, it has been fitted with Total seal 2nd ring. I've read some info lately about using a std ring in the second groove, with larger gap than the top to stop any pressure getting trapped between the rings. This makes a fair bit of sense to me. So, if thats the case, should I have a gapless second ring or conventional ring.
The Arias pistons that I got for my BBC came with a conventional second ring.
you already know the answer.
 

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Discussion Starter #9
"you already know the answer"

Is the right answer to run ***** on top with conventional second?

I'm relativly new to running blown alky and just want to get it right.
Many people still seem to be running gapless on the second ring, but I'm wondering if that's just old school thought. Is it that we've always run them like that, so it's right. Or is there other reasons/issues that I don't know about.
 

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"you already know the answer"

Is the right answer to run ***** on top with conventional second?

I'm relativly new to running blown alky and just want to get it right.
Many people still seem to be running gapless on the second ring, but I'm wondering if that's just old school thought. Is it that we've always run them like that, so it's right. Or is there other reasons/issues that I don't know about.
Yes.
 

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Are you telling us you have an .078 ***** top ring?

If so what is the bore dia.
 
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Are you telling us you have an .078 ***** top ring?

If so what is the bore dia.

The grooves are cut to .0787 on an .017....0783 on a .031

The ring face is .0625 and the step size is either .031 or .017.

The wider face allows more pressure to get behind the ring.
 
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"you already know the answer"

Is the right answer to run ***** on top with conventional second?

I'm relativly new to running blown alky and just want to get it right.
Many people still seem to be running gapless on the second ring, but I'm wondering if that's just old school thought. Is it that we've always run them like that, so it's right. Or is there other reasons/issues that I don't know about.
The Gapless Second has more to do with fuel control than it does ring seal.

However, if the top ring is doing its job the second ring is for oil control.

If you want the second ring to control compression, turn it over ....(please, don't do that)
 

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Butch
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The grooves are cut to .0787 on an .017....0783 on a .031

The ring face is .0625 and the step size is either .031 or .017.

The wider face allows more pressure to get behind the ring.
X2 and IMO the .031" ***** is more for high RPM N/A engines

Speed-Pro has no issues getting the rings in std moly. For steel you would be looking at Total Seal because as far as I know Speed-Pro doesnt offer a steel ***** as far as I know

I like the *****/Pressure Back/L Ring but the groove is IMPORTANT and the UPPER RING LAND is important too. Closer to the deck is best but usually doesnt happen. My valve pockets (23 degree chevy) are deep and pretty large so the top ring land is .200"down on one set and .210" on another set but the upper ring lands dont have pressure grooves and is turned down

Mark may remember but Childs & Albert used to take an .062" Dura-Moly and cut down the back of the ring to .0315" for an .030" spacer and would trim down the .062" part of the ring to .043" or so for a 1/16" groove and this allowed gas pressure to apply and they also did a .031" ***** where you use the spacer and machine the outside step in the ring to .0785"
 

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I work on diesel engines, they use what we call a keystone ring. Is this the same as a ***** ring? Just wondering.
 

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a keystone ring has a tapered and angled slot in the piston ring land...

some will say that it appears to liik like a pie cut slice of pizza.

the design will allow it to wedge and seal better under long and hard miles....

dont forget that most diesel engines have no crackcase vaccume to help rings seal as compared to a conventional engine.
 

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How will they hold up with a little spray? Like a 250 shot?

I got myself involved in a 331 right now, and a used set of Venolia pistons for *****.
 

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Some Top Fuel teams run a ***** ring in the top and second groove. So much combustion pressure gets past the top ring that the pressure actually helps to seal the second ring. Oil control is not a priority concern in Top Fuel engines.
 
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