the +.060" hypatecs I just bought came with cast hastings rings... as did the ones I had in it for the last 6 years - the bores were rooted, but the rings were still good
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| Cast vs Chrome Rings https://www.ausmini.com/forums/viewtopic.php?f=2&t=40936 |
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| Author: | Anto [ Thu Apr 10, 2008 10:13 am ] |
| Post subject: | Cast vs Chrome Rings |
I see that Hypatec pistons now generally come standard with chrome top rings (Hastings) which are apparently a lot better for a road car (ie, longer to bed in, but better longevity). The 1360 Hypatecs I fitted to my 1275, which isn't in the car yet, came with standard cast rings. So how much difference is there? Are the rings on my engine going to require replacing sooner rather than later because I don't have chrome top rings? Am I going to notice the difference? |
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| Author: | simon k [ Thu Apr 10, 2008 10:29 am ] |
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the +.060" hypatecs I just bought came with cast hastings rings... as did the ones I had in it for the last 6 years - the bores were rooted, but the rings were still good
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| Author: | drmini in aust [ Thu Apr 10, 2008 2:07 pm ] |
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Anto the cast rings are OK, in fact GR prefers them as they bed in sooner. 
I have chrome Hastings ones in the 1360, and one of GR's cast `Nippon' ringsets on the 1412's Hypatecs... |
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| Author: | KLAS [ Thu Apr 10, 2008 3:14 pm ] |
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IIRC chrome rings are more resistend to dirt particles, maybe of advantage in dusty locations or if running without airfilter. but they may anneal from the heat of operation and loose radial tension |
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| Author: | drmini in aust [ Thu Apr 10, 2008 3:23 pm ] |
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KLAS wrote: IIRC chrome rings are more resistend to dirt particles, maybe of advantage in dusty locations or if running without airfilter. but they may anneal from the heat of operation and loose radial tension
The same thing happens with plain cast rings. The 73mm Hypatecs in my 1412 stroker came out of GR's 1360 Elder 8 port dyno day motor- after 4 hours dyno running the cast top rings had lost 1/2 tension, so I got a Nippon ring set from him for my engine build.
Chrome rings are supposed to give reduced bore wear. Only downside is they do take longer to bed in. |
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