If you’re building an engine with a lot of stroke, there’s a good chance you’ll need pistons that include a special oil ring support with the ring package.
That’s because, due to the nature of the piston head design, the oil ring groove interferes with the wrist pin bore. As a result, there’s a small gap in the groove and, if left unchecked, it could allow the oil scraper rings to gradually work loose and pull away from the ring groove.
Suffice it to say, when that happens, you’re going to have a bad day.
That’s why the piston experts over at RaceTec often include a specialized oil ring support with some of their piston kits to prevent that from happening.
Get all the details behind how these oil ring supports work, when and why you’ll need them, and how to install one properly in this quick video we found on the Summit Racing YouTube Channel.
All told, if you’re installing pistons and notice the ring groove intersects with the wrist pin bore, you’ve got to watch this video to avoid a potentially serious issue:
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