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Bored&Stroked · 09-01-2022, 01:38 PM

They should - and it should be documented with the rings. If it was mine, I'd call Hastings and ask them (or whomever supplied your pistons/rings).

Here are their general recommendations - which would work fine in your application:

Minimum gap tolerances must be observed in order to prevent the ring ends from butting together as the ring expands when the engine approaches operating temperature. Hastings recommends a MINIMUM of .0035 gap per inch of cylinder diameter. Example: 4″ (bore) x .0035 = .0 14 minimum gap.

So, with a 3.187 bore engine, the minimum ring gap would be .011 to .012. The top-ring usually gets a bit hotter than the 2nd one, so you could use a gap of .013 on the top and .012 on the middle and you'll be fine.

09-01-2022, 01:38 PM	#2
Bored&Stroked Senior Member Join Date: Jan 2011 Location: Central Ohio Posts: 5,910	Re: Ring gap They should - and it should be documented with the rings. If it was mine, I'd call Hastings and ask them (or whomever supplied your pistons/rings). Here are their general recommendations - which would work fine in your application: Minimum gap tolerances must be observed in order to prevent the ring ends from butting together as the ring expands when the engine approaches operating temperature. Hastings recommends a MINIMUM of .0035 gap per inch of cylinder diameter. Example: 4″ (bore) x .0035 = .0 14 minimum gap. So, with a 3.187 bore engine, the minimum ring gap would be .011 to .012. The top-ring usually gets a bit hotter than the 2nd one, so you could use a gap of .013 on the top and .012 on the middle and you'll be fine.