Cast ring gap
same but different
Joined: Jun 2007
Posts: 2,962
From: Central Missouri
Until someone can give you some Olds specific numbers here is what Hastings has to say about it....
https://www.hastingspistonrings.com/...sion-ring-gaps
https://www.hastingspistonrings.com/...sion-ring-gaps
Registered User
Joined: May 2018
Posts: 782
What engine size and what will it be used for?
What pistons are you using? New or Used?
Did you measure the ring grooves for ring thickness, clearance, and for Radial thickness?
Race, street, cruising?
Are you having the block honed professionally with a torque plate or doing a Ball-hone?
The main idea is to make sure the second ring has at least .002+ wider gap than the top ring.
Also, are both top and second rings cast, or do you have a ductile iron top ring and a cast second ring.
What pistons are you using? New or Used?
Did you measure the ring grooves for ring thickness, clearance, and for Radial thickness?
Race, street, cruising?
Are you having the block honed professionally with a torque plate or doing a Ball-hone?
The main idea is to make sure the second ring has at least .002+ wider gap than the top ring.
Also, are both top and second rings cast, or do you have a ductile iron top ring and a cast second ring.
Last edited by Battenrunner; Apr 4, 2019 at 08:53 PM.
Registered User
Joined: Nov 2008
Posts: 8,477
From: Central Fl
.0045 per inch on the top ring and .0055 per inch of bore on the second for your application. In addition, make sure you have at least .015 on the oil rails. Ring material is irrelevant.
Last edited by cutlassefi; Apr 5, 2019 at 05:44 AM.
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