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Jun/Jul 2008Subscribe NowEngine videos online! Check out the GEM video index on YouTube, the quickest way to find gas engine videos on the Internet. We’ve done the searching, all you have to do is the watching! Click below for GEM engine video index. |
Rusty Hopper's Modeler's CornerO-ring RamblingsHello again everyone. The other day a friend of mine asked me about using an o-ring instead of piston rings in a scale engine. I love the idea, and I use o-rings in most of the models I build. Further, sometimes I install a cast ring in the ring groove below the o-ring. After the engine is broken in I'll pull the o-ring and install another cast ring, which gives it great compression. The o-ring method will give you some piston slap as you are running only one "ring," and it is at the top of the piston. In my experience this hasn't caused any problems. If you want to run an o-ring, here is the way I do it. First, fit the piston close to your bore size -just so it passes smoothly through the bore. Next, cut the groove you normally would for a regular cast ring. I have found that each o-ring needs a custom fit as they come in many ... 797 of 3670 characters shown.
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