Piston ring gap?
- Thread starter Wicked_306
- Start date
bluevenom867
I will have images of molesting stuffed animals in
.
bluevenom867
I will have images of molesting stuffed animals in
Wicked_306 said:
You say you got speed pro's,I would look on there web site and see if they dont recogmend a gap or call them.
Most likely you will still have to file them for proper clearance. Sometimes the top rings will be really close, but the 2nd rings are almost never close.
I'd go .018-.020 on the top ring, and then add +.002 to that for your second ring gap. The oil rings will need nothing...
YES I SAID THE 2ND RING GAP WILL BE LARGER THEN THE 1ST, THIS IS THE NEW IMPROVED WAY. IT HELPS GET THE AIR TRAPPED BETWEEN THE RINGS OUT FOR BETTER SEAL AND LESS FLUTTER
Have you ever filed a ring before? Do you have a ring filer or will these have to be done with a flat file?
I'd go .018-.020 on the top ring, and then add +.002 to that for your second ring gap. The oil rings will need nothing...
YES I SAID THE 2ND RING GAP WILL BE LARGER THEN THE 1ST, THIS IS THE NEW IMPROVED WAY. IT HELPS GET THE AIR TRAPPED BETWEEN THE RINGS OUT FOR BETTER SEAL AND LESS FLUTTER
Have you ever filed a ring before? Do you have a ring filer or will these have to be done with a flat file?
bluevenom867
I will have images of molesting stuffed animals in
Rick 91GT said:
Ahh,I see your using that method now to,we did that with our Perfect Circle (Dana corp.)rings in the 408.No problems at all,and they seated just fine if anyone is wondering.
Yeah I've been doing it for over a year now with no issues, atleast your starting to see the ring manufactors re-word/change there instructions. Only ring I get that states the top larger is Total Seal, but I hear they will be changing as well 
giddyup306
Founding Member
- Oct 22, 2002
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Rick 91GT said:Yeah I've been doing it for over a year now with no issues, atleast your starting to see the ring manufactors re-word/change there instructions. Only ring I get that states the top larger is Total Seal, but I hear they will be changing as well
What he said. If you are using a bastard file be careful and make sure you are square.
bluevenom867
I will have images of molesting stuffed animals in
giddyup306 said:
Very true.
Also,you know the differance between the "Made in U.S.A" and the Chinese ring filers are?Almost $80!
But hey,most of the american made piece are metal,so you dont break them.
Only one other thing that I might be able to add...
Check with the manufacturer for which side of the ring to file. I think the oil rings on my Total Seals had to be filed on one side only, maybe it was the second rings. Not sure if anyone else does this though.
Check with the manufacturer for which side of the ring to file. I think the oil rings on my Total Seals had to be filed on one side only, maybe it was the second rings. Not sure if anyone else does this though.
EMW150
Founding Member
Rick 91GT said:Yeah I've been doing it for over a year now with no issues, atleast your starting to see the ring manufactors re-word/change there instructions. Only ring I get that states the top larger is Total Seal, but I hear they will be changing as well
Hey Rick, I agree. The old theory was that the top ring was exposed to more heat (since it's directly exposed to combustion) than the secondary ring which caused it to expand more and tighten the gap. The thinking now (which I feel is correct) is to gap the secondary larger to allow the combustion gas that gets past the top ring out instead of trapping it and lifting that top ring causing increased blowby.
EMW150
Founding Member
Rick 91GT said:Always file both sides of your rings, make sure you keep them square, and deburr them after filing.
Eric,I gave Bill some more info this morning on rockers for you, if you need anything you can always just call my cell 717-343-2108.
Cool, I like the sound of the Probe shaft setup. Bill told me about that. I'll probably go that route on the 342 since it's going to be revving quite a bit higher. For now I just want to get the 331 back up and running so I can see what it's going to do. I definately picked up in the 60' department last time out but the motor wasn't performing up high (valve springs) to see what I can get the 1/4 times down too. It was off by over 2 mph. Also I want one of those wings for next year. I checked Bill's out.
Rick 91GT said:
I won't argue that with regards to top and second rings, I've never seen otherwise. BUT, my oil control rings from Total Seal (both per piston) were to be filed from one side only. Each ring edge was not cut 90* to the circumference, as most rings are, but rather at a bout 45*. This angle should be retained as well.
Just make sure to check with the ring manufacturer.
This is more complicated than I thought. I dont have a ring grinder. Ill just have to use a flat file. This is my first ring job. So will the oil rings need to be grinded? Rick 91Gt said they wouldnt but some of you said I might have to grind one side. I guess I'll call Speed pro and find out if the oil rings need to be grinded. Thanks
Travis
Travis
Wicked_306 said:
Regardless of what Speedpro says I would put them in the cyl (every single one of them), and check the end gap. It would suck to kill a fresh motor because someone put the wrong rings in the right box. It does happen, but maybe it only happens to me.
EMW150
Founding Member
Wicked_306 said:
With Speed Pros you don't. I've never used Total Seal to know but apparently you do.
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