Docmcg
Well-Known Member
Putting together the slant and need info on piston ring gap. Suggestions please, thanks, Steve.
Piston ring gap
- Thread starter Docmcg
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1WildRT
Well-Known Member
What pistons? It matters...
Docmcg
Well-Known Member
Stock after market .030 over.
Hellrats
Just another dumbass
Should be a card in the box. Follow their instructions. If not @RustyRatRod will know.
What will you be doing with the engine and how is it going to be built?
General rule of thumb is 0.004" for every 1" of cylinder bore diameter for na engines. I have found on the last few builds that the rings I bought (Hastings) put you in this range right out of the box but check them.
1WildRT
Well-Known Member
As long as the pistons aren't Hyperutectic (these aren't) that's a decent range as long as theres no super hard use....
Docmcg
Well-Known Member
Thanks for the info. Just finished installing the rings. Gapped the top at 15 and the second at 17-18. Actually lucked out and got all rings on without breaking any. Haven’t always been that lucky! This engine is for my A100 pickup. Probably won’t see more than occasional usage. Surely won’t be a heavy hauler!
That's puts them a little tight for my liking. That's only like a tic over .013". If it's in a truck hauling loads, or in a hot rod with higher than stock compression and all the other goodies, IMO it needs a good bit more. That's why I asked what he was doing with it.
1WildRT
Well-Known Member
From the Hastings website...
Bore size is 3.42 x .004 = .0136..... I'd say .015 is fine..
Bore size is 3.42 x .004 = .0136..... I'd say .015 is fine..
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