Cast ring gap
April 4th, 2019, 12:54 PM
#2
same but different
Join Date: Jun 2007
Location: Central Missouri
Posts: 2,861
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
April 4th, 2019, 08:43 PM
#3
Registered User
Join Date: May 2018
Posts: 762
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; April 4th, 2019 at 08:53 PM.
April 5th, 2019, 05:40 AM
#4
Registered User
Join Date: Nov 2008
Location: Central Fl
Posts: 7,826
.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; April 5th, 2019 at 05:44 AM.
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