CP Ring Gap SC7021
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Honda-Tech Member
Joined: Mar 2002
Posts: 2,302
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From: Calgary, AB, Canada
CP Ring Gap SC7021
After reading all the posts new and old on this subject the best I could see was earls recomended:
0.006 per inch of bore on the top ring and 0.0045 per inch of bore on the middle
I called Darius at CP and he recomended for < 450 crank hp:
0.0048 per inch of bore on the top ring and 0.006 per inch of bore on the middle
(0.016 gap for top & 0.020 gap for middle total gap on my 84.5mm turbo b20)
What do you guys think?
0.006 per inch of bore on the top ring and 0.0045 per inch of bore on the middle
I called Darius at CP and he recomended for < 450 crank hp:
0.0048 per inch of bore on the top ring and 0.006 per inch of bore on the middle
(0.016 gap for top & 0.020 gap for middle total gap on my 84.5mm turbo b20)
What do you guys think?
Joined: Jul 2004
Posts: 4,144
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From: Farmington, MN, USA
Re: CP Ring Gap SC7021 (legendboy)
After your math:
Darius at CP : Top .016
Mid .020
After doing the conversion on Earl's:
Top .020
Mid .015
I'm no genious, but I think one of them may have meant for their top dimension to be in the middle. Either way, I can't say who's right or wrong, I just wanted to post all of the side by side info. Give one of them a call and tell them your findings and see what they say.
Darius at CP : Top .016
Mid .020
After doing the conversion on Earl's:
Top .020
Mid .015
I'm no genious, but I think one of them may have meant for their top dimension to be in the middle. Either way, I can't say who's right or wrong, I just wanted to post all of the side by side info. Give one of them a call and tell them your findings and see what they say.
Thread Starter
Honda-Tech Member
Joined: Mar 2002
Posts: 2,302
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From: Calgary, AB, Canada
Re: CP Ring Gap SC7021 (stealthmode62)
No thats exactly it. Earl says run the top looser to that blow by gasses have a place to exit once they get trapped between the two rings. This is the way JE use to recomend their ring gap, but now it seems as though the thinking has changed on it.
The only posts I could find were fairly old, so i'm wondering if anybody else has any input on it
The only posts I could find were fairly old, so i'm wondering if anybody else has any input on it
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From: Orlando,FL
Re: (earl)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by earl »</TD></TR><TR><TD CLASS="quote">Don't go by my old posts....
I now use .018" upper and .020-.022" middle
Darius changed my thinking.</TD></TR></TABLE>
What's the theory behind running a tighter clearance on the top ring and a loser one on the second?
I now use .018" upper and .020-.022" middle
Darius changed my thinking.</TD></TR></TABLE>
What's the theory behind running a tighter clearance on the top ring and a loser one on the second?
Thread Starter
Honda-Tech Member
Joined: Mar 2002
Posts: 2,302
Likes: 1
From: Calgary, AB, Canada
Re: (earl)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by earl »</TD></TR><TR><TD CLASS="quote">Don't go by my old posts....
I now use .018" upper and .020-.022" middle
Darius changed my thinking.</TD></TR></TABLE>
haha well i'm glad i didn't get that far last night then!!!!
I now use .018" upper and .020-.022" middle
Darius changed my thinking.</TD></TR></TABLE>
haha well i'm glad i didn't get that far last night then!!!!
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