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08-18-2019, 10:45 PM | #11 |
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Re: spiral or ring type piston pin retainers
I have been running round pin rings (CP) for over 2 years now (200 runs) in my 5.7 drag pak up to 8400 rpm and never had a problem with ring clips, pins or piston.
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08-19-2019, 12:10 AM | #12 | |
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Re: spiral or ring type piston pin retainers
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08-19-2019, 08:46 AM | #13 |
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Re: spiral or ring type piston pin retainers
I was in the engine machining and building world for many years and not once can I recall seeing round wire pin locks....from any of the major piston manufacturers.
Round snap ring type was common.....double per side and then spiral locks were the most common. Yes they tear up your fingers and usually end up with some blood involved. They made a tool for them but I developed a pretty easy method of getting them in and out.....no blood....usually... I would guess the round wire lock does not pound out the groove like a flat lock does making it harder to disassemble pistons after some use... I also assume the round wire lock groove is cut to fit the lock and if done wrong bad things happen...… I usually Learn something new everyday...but I'm sticking with spiral locks.....LOL
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Rich Biebel S/C 1479 |
08-19-2019, 08:52 AM | #14 |
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Re: spiral or ring type piston pin retainers
thanks guys for responses ,, I did get some helpful information from the piston manufacture as well that puts my mind at ease
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08-19-2019, 09:12 AM | #15 |
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Re: spiral or ring type piston pin retainers
The more I thought about it I do recall some old engines had round wire locks....maybe some foreign stuff......can't recall anymore exactly....its been to long....
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Rich Biebel S/C 1479 |
08-21-2019, 02:26 PM | #16 | |
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Re: spiral or ring type piston pin retainers
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08-21-2019, 03:31 PM | #17 | |
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Re: spiral or ring type piston pin retainers
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I'm not sure Rich, but I think that you might be referring to the doubled up Tru-Arc snap rings. Bob
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Bob Mulry 7516 STK A & M Motorsports |
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08-21-2019, 05:11 PM | #18 | |
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Re: spiral or ring type piston pin retainers
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Again, no failures. Also used single spiral locks too.
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08-21-2019, 07:05 PM | #19 | |
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Re: spiral or ring type piston pin retainers
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No Bob.....What Mark said was spot on about Tru Arcs....exactly what we used and how we installed them.. I was thinking of some old engines and oddball stuff that we occasionally worked on....Round wire locks... In my long working career I once worked in a pretty famous restoration shop here in NJ.....They did all old cars and specialized in Packards and other high end old cars....I worked on some real interesting cars for a while.....I worked in the mechanical end.....engines, drivelines,brakes, you name it. Was to slow a pace for me and the pay was poor.....Rich guys spending a fortune and we got paid coolie wages....LOL Like they say today.....He gone....that was me....
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Rich Biebel S/C 1479 |
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