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Old 12-12-2012, 11:49 AM
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Originally Posted by srry View Post
I'll try to be concise here (HA!), but basically I think I've worked myself into a slightly expensive situation, and I just need some advice on getting out of it... as cheaply as possible.

I've got this 347 Ford stroker I'm building and I made some rather bad decisions when it came time to get the thing machined. You see, I ordered my bottom end kit from Coast High Performance, and along with their kit, they (unknown to me at the time) sent me a rather expensive set of low tension plasma-moly rings. According to my machinist, plasma-moly rings require a much finer finish on the cylinder bore in order to live, and so I followed his recommendation, which cost me a few extra bucks. Unfortunately, in a bout of absent-mindedness, I completely forgot to ask him to use a torque plate, and my machinist never asked (he told me later he does not typically recommend this for street applications like mine... but that's under normal circumstances.) My machinist never saw my rings before he did the bore/hone, so he didn't realize they were low tension... and a while after the work had already been done, I realized what they were, did a little research on them, and realized that low tension rings really need a perfectly round bore to work correctly.

So, to sum it all up where I am at this point... I have cylinder bores that are honed specifically for these really expensive rings, but not torque plate honed, so they're not ideal. I'm worried I'm going to end up with an oil burner, especially with the already troublesome rod ratios of 347's.

At this point I can buy new plasma-moly rings that are NOT low-tension, but they are kinda big bucks (something like $140). And I already spent extra on the machining, when, if I'd known, I could have bought a set of cheapo rings from the beginning and been done with it. But does it REALLY matter? I am adamant at this point that I cannot keep throwing away money on useless parts that don't help me at all. I've run way over budget doing that kinda thing, and all the little "oh but it's only 100 bucks more" REALLY adds up. Do I just run with what I have, or drop even more money on new rings?
Are the rings un opened? just exchange them for the right ones. Total Seal is not that bad. they will usally help you change them out. Or the person you got the kit from.

Now your motor came with low tension rings if its a 87 or newer. I think??

Just put it together with what you have it will be fine. If your machine shop has bored and honed the cylinder it should be fine. Since the engine was setup for the rings you have best to not run different rings. Since you have them run them it will be fine. the original engine would last 100K miles with those rings. The factory also does not do such a hot job of boring them and people do re ring them without much problems.
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