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Ring gap goof #2755177
03/23/20 07:31 PM
03/23/20 07:31 PM
Joined: May 2016
Posts: 151
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Wirenut Offline OP
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Wirenut  Offline OP
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So what’s the largest second ring gap you ever ran because you daydreamed while filing ? Let’s say it was a 12 -1 rb bracket motor no power adders.
I know I can get a replacement. Just curious
G

Re: Ring gap goof [Re: Wirenut] #2755182
03/23/20 07:39 PM
03/23/20 07:39 PM
Joined: Aug 2003
Posts: 34,973
Bend,OR USA
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Cab_Burge Offline
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I've used them with .050 on the stock top rings and more on the second rings with no issuesup
I now make sure I have at least .020 on the top rings with .024 or bigger on the second ring with no power adder, I do add .006 to both rings or more onto the blown gas street motors I build to both rings, depending on the heads and carb sizes and expected power levels up (I've used .026 on the top ring and .034 on the second rings on a N/A B1 motor with a 4.495 (EDITED blush) bore size) that made 920+ HP on race gas on the dyno breaking it in with good results with no vacuum pump work I use the .0045 per 1 inch diameter on the top ring and .0050+ on the second ring on N/A drag race motors up
It is way better to have .003 + to much end gap than .0001 to little work twocents

Last edited by Cab_Burge; 03/24/20 02:35 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Ring gap goof [Re: Cab_Burge] #2755309
03/24/20 07:13 AM
03/24/20 07:13 AM
Joined: Jan 2003
Posts: 5,338
Abilene, Texas
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fastmark Offline
master
fastmark  Offline
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Posts: 5,338
Abilene, Texas
I agree with those numbers. I just built a motor with stock size rings. They were not ordered to file to fit. The top was .013 on a 4.360 bore. I had to file to get my .020. Just goes to show that you check everything.

Re: Ring gap goof [Re: Cab_Burge] #2755369
03/24/20 10:20 AM
03/24/20 10:20 AM
Joined: Jan 2003
Posts: 3,716
Moved to N.E. Tennessee
GomangoCuda Offline
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GomangoCuda  Offline
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Moved to N.E. Tennessee
Quote
B1 motor with a 4.995 bore size)

Cab, I think you need to tell us more about this engine.


In theory, there is no difference between theory and practice. In practice, there is.
Re: Ring gap goof [Re: Wirenut] #2755459
03/24/20 02:03 PM
03/24/20 02:03 PM
Joined: Dec 2006
Posts: 52
canada
W2-408 Offline
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canada
FWIW I don't even run a second ring at all on my 11.7:1 small block, and have the oil rings crimped down to really low tension. No vacuum pump, just the pan evac system. Going on the 3rd season without touching it and it still makes just as much power as it did when it was fresh, and doesn't use any oil.


Street car, 10.12 @ 132 with W2's and pump gas
Re: Ring gap goof [Re: GomangoCuda] #2755466
03/24/20 02:36 PM
03/24/20 02:36 PM
Joined: Aug 2003
Posts: 34,973
Bend,OR USA
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Cab_Burge Offline
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Bend,OR USA
Originally Posted by GomangoCuda
Quote
B1 motor with a 4.995 bore size)

Cab, I think you need to tell us more about this engine.

Dang my fingers and pour proof reading blush I fix it up It was and is 4.495 bore size up


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Ring gap goof [Re: W2-408] #2755695
03/25/20 09:17 AM
03/25/20 09:17 AM
Joined: May 2016
Posts: 151
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Wirenut Offline OP
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Wirenut  Offline OP
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Originally Posted by W2-408
FWIW I don't even run a second ring at all on my 11.7:1 small block, and have the oil rings crimped down to really low tension. No vacuum pump, just the pan evac system. Going on the 3rd season without touching it and it still makes just as much power as it did when it was fresh, and doesn't use any oil.


Really?

Re: Ring gap goof [Re: Wirenut] #2755813
03/25/20 01:35 PM
03/25/20 01:35 PM
Joined: Aug 2003
Posts: 34,973
Bend,OR USA
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Cab_Burge Offline
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I tried removing the stock 5/16 second ring from my old NHRA stocker legal 1970 street hemi, it didn't go any faster and it started oiling the plugs after one run, not fouling them but making them shiny whiney


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Ring gap goof [Re: Cab_Burge] #2755822
03/25/20 01:47 PM
03/25/20 01:47 PM
Joined: May 2016
Posts: 151
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Wirenut Offline OP
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Wirenut  Offline OP
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It would never occur to me to do that or that it would work!

Re: Ring gap goof [Re: Wirenut] #2755834
03/25/20 02:02 PM
03/25/20 02:02 PM
Joined: Aug 2003
Posts: 34,973
Bend,OR USA
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Cab_Burge Offline
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Joined: Aug 2003
Posts: 34,973
Bend,OR USA
Originally Posted by Wirenut
It would never occur to me to do that or that it would work!

Rumors and trash talk in the pits between runs, some guys will lie to you to see if you will buy it, I did realcrazy
Now I know better, learning by doing sometimes make you go backwards before you figure out which way to go to make more power or how to go faster shruggy
The good thing about learning that way is you never forget it whistling
All knowledge is good, even when it doesn't do what you hope for work up

Last edited by Cab_Burge; 03/25/20 02:03 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Ring gap goof [Re: Wirenut] #2755839
03/25/20 02:16 PM
03/25/20 02:16 PM
Joined: Jun 2003
Posts: 51,918
Romeo MI
MR_P_BODY Online content
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MR_P_BODY  Online Content
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I was gonna try it but I figured I wanted the piston stability more
wave

Re: Ring gap goof [Re: MR_P_BODY] #2756137
03/26/20 10:39 AM
03/26/20 10:39 AM
Joined: Sep 2003
Posts: 12,878
north of coder
moparx Offline
"Butt Crack Bob"
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north of coder
piston stability was on my mind as well, but i'm not an engine builder, just an assembler.
beer


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