Q: Absolute minimum ring-gap on Silv-O-Lite Hyper pistons?
10-23-2001 | 02:07 AM
#1
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Junior Member
Joined: Mar 2001
Posts: 45
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From: Sterling Heights, MI 48313
Q: Absolute minimum ring-gap on Silv-O-Lite Hyper pistons?
Hello all.
I am currently rebuilding my '87 L98 350. I wont go into all the details, for I have a very narrow question - What is the Absolute minimum ring-gap to run on the top compression rings on my Silv's Hyper +.030 350 pistons? I have them filed to .022, and I have heard that this is enough; the minimum safe gap. Also, I have the middle rings gapped at .016, but I have been told this is fine. Thoughts on this? Advice? Anything is appreciated!
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1987 Trans am GTA
5.7 liter TPI / 700R4
Aus 9-bolt + 3.70 gear
I am currently rebuilding my '87 L98 350. I wont go into all the details, for I have a very narrow question - What is the Absolute minimum ring-gap to run on the top compression rings on my Silv's Hyper +.030 350 pistons? I have them filed to .022, and I have heard that this is enough; the minimum safe gap. Also, I have the middle rings gapped at .016, but I have been told this is fine. Thoughts on this? Advice? Anything is appreciated!
------------------
1987 Trans am GTA
5.7 liter TPI / 700R4
Aus 9-bolt + 3.70 gear
10-23-2001 | 06:32 AM
#2
Supreme Member
Joined: Aug 1999
Posts: 1,443
Likes: 0
From: College Station, Tex USA
Car: 89rs
Engine: 400Sb
Transmission: Tremec 3550
the most recent end gap number I have seen is .0065 inch for each inch of bore on street motors normally aspirated. That would make a .030 over 350 about .026" top gap. I think you can probably go .023 or .024 but i would not go much less than that.
Second rings do not require extra gap.
Second rings do not require extra gap.
10-23-2001 | 07:41 PM
#3
TGO Supporter
Joined: Aug 1999
Posts: 14,811
Likes: 1
From: Jackson County
i think the last set i used said 40% over factory end gaps for the top ring.
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ICON Motorsports
1st & 3rd
MM Black Diamond 538 F&AM
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ICON Motorsports
1st & 3rd
MM Black Diamond 538 F&AM
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