Rubber plugs in corner seals
12-15-03, 01:36 PM
#1
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Rubber plugs in corner seals
Just curious why those rubber plugs are in the corner seals.....
Why design them that way?? I don't really see a point.
What would happen if you didn't use them at all?? I've never seen rubber inside an engine before! LOL.
Why design them that way?? I don't really see a point.
What would happen if you didn't use them at all?? I've never seen rubber inside an engine before! LOL.
12-15-03, 02:21 PM
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I beleive you can get onepeice, solid seals from Atkins...
but my question remains, what would happen if they weren't there?? When I dissasembled my engine there were several missing, but compression was fine with the exeption of the blown side seal.
but my question remains, what would happen if they weren't there?? When I dissasembled my engine there were several missing, but compression was fine with the exeption of the blown side seal.
12-15-03, 06:24 PM
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Yeah i'm pretty sure they're just there to aid in hot start cranking compression...
There was a good thread on here about it, or maybe over at nopistons.com or something.. i can't remember.
There was a good thread on here about it, or maybe over at nopistons.com or something.. i can't remember.
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12-16-03, 12:50 AM
#8
My opinion/theory on the matter is that they are there to *try* and prevent carbon buildup UNDER the apex seal, where the springs sit. At this, they fail miserably. The rubber turns rock solid in 20k miles, and often times they break up and fly out the exhaust.
I have built a lot of motors without them, and noticed NO difference in hot start, cold start, or compression, idle, boost, anything. Not even carbon buildup on teardown.
I have built a lot of motors without them, and noticed NO difference in hot start, cold start, or compression, idle, boost, anything. Not even carbon buildup on teardown.
12-16-03, 08:50 PM
#12
I think the spiral leaf spring 3rd gen corner seal springs are quite a bit better than the earlier wire sping design.
My low comp rotor Pineapple 3mm seal rebuild did not use the rubber corner seal inserts and it has always been VERY easy starting hot or cold- started RIGHT up when I installed it as well.
My low comp rotor Pineapple 3mm seal rebuild did not use the rubber corner seal inserts and it has always been VERY easy starting hot or cold- started RIGHT up when I installed it as well.
12-16-03, 11:21 PM
#13
I agree that the FD and later corner seal springs are much better in *design*. However, I find myself asking, once installed in a running engine, how much better they are in practice? The seal itself is the same, so it is no stronger. Once the seals and springs on teh side of the rotor get compressed when tightening down the stack (tension bolts) they never move again, in contrast to apex seals which are constantly moving.
Whast I'm saying is that, in my estimation, 2 equally built engines, one with s5 and earlier CS springs and one with 93 and later CS springs, would both perform the same under all conditions.
However, I have no actual data to back this up.
Whast I'm saying is that, in my estimation, 2 equally built engines, one with s5 and earlier CS springs and one with 93 and later CS springs, would both perform the same under all conditions.
However, I have no actual data to back this up.
12-17-03, 08:07 AM
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Originally posted by RotaryResurrection
I agree that the FD and later corner seal springs are much better in *design*. However, I find myself asking, once installed in a running engine, how much better they are in practice? The seal itself is the same, so it is no stronger. Once the seals and springs on teh side of the rotor get compressed when tightening down the stack (tension bolts) they never move again, in contrast to apex seals which are constantly moving.
Whast I'm saying is that, in my estimation, 2 equally built engines, one with s5 and earlier CS springs and one with 93 and later CS springs, would both perform the same under all conditions.
However, I have no actual data to back this up.
I agree that the FD and later corner seal springs are much better in *design*. However, I find myself asking, once installed in a running engine, how much better they are in practice? The seal itself is the same, so it is no stronger. Once the seals and springs on teh side of the rotor get compressed when tightening down the stack (tension bolts) they never move again, in contrast to apex seals which are constantly moving.
Whast I'm saying is that, in my estimation, 2 equally built engines, one with s5 and earlier CS springs and one with 93 and later CS springs, would both perform the same under all conditions.
However, I have no actual data to back this up.
